Document:

EXHIBIT 4.2

                          SUPPLEMENTAL INDENTURE NO. 1

                                 By and Between

                         SENIOR HOUSING PROPERTIES TRUST

                                       and

                       STATE STREET BANK AND TRUST COMPANY

                               As of June 21, 2001

             SUPPLEMENTAL TO THE INDENTURE DATED AS OF JUNE 21, 2001

                      ------------------------------------

                         SENIOR HOUSING PROPERTIES TRUST

            10.125% Junior Subordinated Debentures due June 15, 2041

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                                TABLE OF CONTENTS
<S>                <C>                                                                                           <C>

ARTICLE I           DEFINITIONS...................................................................................1
         1.1.       Definition of Terms...........................................................................1
ARTICLE II          GENERAL TERMS AND CONDITIONS OF THE DEBENTURES................................................3
         2.1.       Designation and Principal Amount..............................................................3
         2.2.       Stated Maturity...............................................................................4
         2.3.       Form and Payment; Minimum Transfer Restriction................................................4
         2.4.       Procedure for Distribution of Debentures to Holders of Trust Preferred
                    Securities; Global Debenture; Depositary......................................................4
         2.5.       Interest......................................................................................5
         2.6.       Applicability of Discharge, Defeasance and Covenant Defeasance Provisions.....................6
ARTICLE III         REDEMPTION OF THE DEBENTURES..................................................................6
         3.1.       Tax Event or Investment Company Event Redemption..............................................6
         3.2.       Optional Redemption by Company................................................................6
         3.3.       Payment of Redemption Price if Preferred Securities are Book-entry............................6
ARTICLE IV          EXTENSION OF INTEREST PAYMENT PERIOD..........................................................7
         4.1.       Extension of Interest Payment Period..........................................................7
         4.2.       Notice of Extension...........................................................................8
ARTICLE V           COVENANTS.....................................................................................8
         5.1.       Additional Covenants of the Company...........................................................8
ARTICLE VI          EVENTS OF DEFAULT.............................................................................9
         6.1.       Events of Default.............................................................................9
ARTICLE VII         SUBORDINATION OF DEBENTURES...................................................................9
         14.1.      Agreement to Subordinate.....................................................................10
         14.2.      When Distribution Must be Paid Over..........................................................10
         14.3.      Note By Company..............................................................................11
         14.4.      Subrogation..................................................................................11
         14.5.      Relative Rights..............................................................................11
         14.6.      Subordination May Not Be Impaired by Company.................................................11
         14.7.      Distribution or Notice to Representative.....................................................11
         14.8.      Authorization of Trustee to Effectuate Subordination of the Debentures.......................12
ARTICLE VIII        EFFECTIVENESS................................................................................12
ARTICLE IX          MISCELLANEOUS................................................................................12
         9.1.       Separablity..................................................................................12
         9.2.       Supplemental Indenture Controls..............................................................12
         9.3.       Governing Law................................................................................12
         9.4.       Counterparts.................................................................................12

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                                       i

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         This SUPPLEMENTAL INDENTURE NO. 1 (this "Supplemental  Indenture") made
and entered into as of June 21, 2001 between SENIOR HOUSING  PROPERTIES TRUST, a
Maryland real estate investment trust (the "Company"), and STATE STREET BANK AND
TRUST COMPANY, a Massachusetts trust company, as Trustee (the "Trustee"),

                                WITNESSETH THAT:

         WHEREAS,  the Company and the Trustee have  executed  and  delivered an
Indenture,  dated as of June 21, 2001 (the "Base  Indenture" and,  together with
this Supplemental Indenture, the "Indenture") to provide for the future issuance
of the Company's junior  subordinated  debt securities (the  "Securities") to be
issued from time to time in one or more series;

         WHEREAS,  pursuant  to the  terms of the Base  Indenture,  the  Company
desires to provide for the  establishment  of a series of its Securities,  to be
known as its  10.125%  Junior  Subordinated  Debentures  due June 15,  2041 (the
"Debentures"),  the  form  and  substance  of such  Debentures  and  the  terms,
provisions  and  conditions  thereof  to be set  forth as  provided  in the Base
Indenture and this Supplemental Indenture;

         WHEREAS,  SNH Capital Trust I, a Maryland business trust (the "Trust"),
has offered to the purchasers  (the  "Underwriters")  named in Schedule A to the
Underwriting  Agreement,  dated June 18,  2001 (the  "Underwriting  Agreement"),
among  the  Representatives  of the  several  Underwriters,  SNH  Capital  Trust
Holdings  as sponsor of the Trust (the  "Sponsor"),  the Trust and the  Company,
$25,000,000   aggregate  liquidation  amount  of  its  10.125%  Trust  Preferred
Securities (the "Trust Preferred Securities"), representing undivided beneficial
interests in the assets of the Trust,  and proposes to invest the proceeds  from
the sale of the Trust  Preferred  Securities,  together with the proceeds of the
sale by the Trust to the  Sponsor,  as  designee  of the  Company,  of  $773,200
aggregate liquidation amount of its Common Securities,  in $25,773,200 aggregate
principal amount of the Debentures; and

         WHEREAS,  pursuant to the  Underwriting  Agreement,  the Trust has also
granted to the Underwriters an option to acquire up to an additional  $3,750,000
aggregate  liquidation  amount  of  its  Trust  Preferred  Securities  to  cover
overallotments,  and proposes to invest the proceeds from any sale of such Trust
Preferred Securities, together with the proceeds of the sale by the Trust to the
Sponsor,  as designee of the Company,  of up to an additional $116,000 aggregate
liquidation amount of its Common  Securities,  up to an $3,866,000 in additional
aggregate principal amount of the Debentures;

         NOW, THEREFORE,  in consideration of the purchase and acceptance of the
Debentures by the Trust,  and for the purpose of setting  forth,  as provided in
the Base  Indenture,  the form and  substance of the  Debentures  and the terms,
provisions and  conditions  thereof,  the Company  covenants and agrees with the
Trustee as follows:

                                   ARTICLE I
                                   DEFINITIONS

         1.1. Definition of Terms. The following definitions supplement, and, to
the extent  inconsistent  with,  replace the  definitions  in Section 101 of the
Indenture:

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         (a)  the  term  "Trust  Preferred  Securities"  as  used  herein  means
"Preferred Securities" as such term is used in the Trust Agreement; and

         (b) the  following  terms have the meanings  given to them in the Trust
Agreement:  (i) Business  Day,  (ii) Closing  Date,  (iii)  Distributions,  (iv)
Guarantee, (v) Investment Company Event, (vi) Liquidation Amount, (vii) Property
Trustee, (viii) Regular Trustee, (ix) Sponsor and (x) Tax Event.

         "Additional Interest" has the meaning specified in Section 2.5(a).

         "Additional Sums" means such additional  amounts as may be necessary in
order that the amount of Distributions due and payable by the Trust on the Trust
Preferred  Securities and Common Securities that at any time remain  outstanding
in  accordance  with the terms  thereof  shall not be reduced as a result of any
additional taxes, duties, assessments and other governmental charges of whatever
nature,  imposed by the United States  government or any other taxing  authority
(but not  including  withholding  taxes  imposed on  holders  of such  Preferred
Securities and Common Securities).

         "Common Security" means an undivided  beneficial interest in the assets
of the Trust.

         "Common  Stock" means common  shares of beneficial  interest,  $.01 par
value per share, of the Company,  or any other stock of any class of the Company
which has no  preference  in respect of dividends  or of amounts  payable in the
event of any voluntary or involuntary liquidation,  dissolution or winding up of
the Company and which is not subject to redemption by the Company.

         "Coupon Rate" has the meaning specified in Section 2.5(a).

         "Extension Period" has the meaning specified in Section 4.1(a).

         "Global Debenture" has the meaning specified in Section 2.4(a).

         "Interest Payment Date" has the meaning specified in Section 2.5.

         "Debentures"  has the meaning  specified in the second  recital to this
Supplemental Indenture.

         "Optional Redemption Price" has the meaning specified in Section 3.2.

         "Obligations" has the meaning specified in Section 14.1(a).

         "Record Date" has the meaning specified in Section 2.5(a).

         "Representatives" has the meaning specified in Section 14.2.

         "Securities"  has the meaning  specified  in the first  recital to this
Supplemental Indenture.

         "Senior  Indebtedness of the Company" means (i) any indebtedness of the
Company for  borrowed or  purchased  money,  whether or not  evidenced by bonds,
debentures, notes or other

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written  instruments,  (ii) obligations of the Company for  reimbursement  under
letters of credit, banker's acceptances, security purchase facilities or similar
facilities  issued for the account of the  Company,  (iii) any  indebtedness  or
other obligations of the Company with respect to commodity contracts  (including
but not limited to contracts  in the spot,  forward and  markets,  options,  and
contracts  for   differences),   interest  rate   commodity  and  currency  swap
agreements,  cap,  floor  and  collar  agreements,  currency  spot  and  forward
contracts,  and other  similar  agreements or  arrangements  designed to protect
against  fluctuations in commodity prices,  currency exchange or interest rates,
and (iv) any guarantees,  endorsements  (other than by endorsement of negotiable
instruments  for collection in the ordinary course of business) or other similar
contingent  obligations  in respect of obligations of others of a type described
in (i), (ii) or (iii) above,  whether or not such  obligation is classified as a
liability on a balance sheet  prepared in  accordance  with  generally  accepted
accounting  principles,  in each case listed in (i), (ii),  (iii) and (iv) above
whether  outstanding on the date of execution of this Supplemental  Indenture or
thereafter  incurred,  other  than  obligations  ranking  on a  parity  with the
Debentures or ranking junior to the Debentures;  provided, however, that "Senior
Indebtedness  of the  Company"  does not include  obligations  of the Company to
trade creditors.

         "Special Event" has the meaning specified in Section 3.1.

         "Special Event Redemption  Price" has the meaning  specified in Section
3.1.

         "Trust"  has  the  meaning  specified  in the  third  recital  to  this
Supplemental Indenture.

         "Trust Agreement" means the Amended and Restated Trust Agreement of SNH
Capital Trust I dated as of June 21, 2001 among SNH Capital Trust  Holdings,  as
Sponsor,  State Street Bank and Trust Company, as Property Trustee,  the Regular
Trustees  named  therein  and the  holders,  from  time to  time,  of  undivided
beneficial  interests  in the assets of the Trust,  as the same may be modified,
amended  or  supplemented  from time to time,  including  all  exhibits  and the
provisions of the Trust  Indenture Act that are deemed to be a part of the Trust
Agreement .

         "Trust  Preferred  Securities"  has the meaning  specified in the third
recital to this Supplemental Indenture.

         "Trust  Securities" means the Common Securities and the Trust Preferred
Securities.

         "Underwriters"  has the meaning  specified in the third recital to this
Supplemental Indenture.

         "Underwriting Agreement" has the meaning specified in the third recital
to this Supplemental Indenture.

                                   ARTICLE II
                 GENERAL TERMS AND CONDITIONS OF THE DEBENTURES

         2.1.  Designation and Principal Amount.  There is hereby authorized one
series  of  Securities,  to  be  designated  the  "10.125%  Junior  Subordinated
Debentures due June 15, 2041," in the initial  aggregate  principal amount of up
to  $29,639,200,  subject to the right of the  Company to reopen such series for
issuances  of  additional  securities  of such  series and except as

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provided in Section 306 of the Base Indenture. The Debentures (together with the
Trustee's  certificate of authentication)  shall be substantially in the form of
Exhibit  A  hereto,  which  is  hereby  incorporated  in and made a part of this
Supplemental Indenture.

         2.2. Stated Maturity. The Stated Maturity of the Debentures is June 15,
2041, provided, however, the Debentures may be earlier redeemed at the option of
the Company as provided in Article III below.

         2.3. Form and Payment; Minimum Transfer Restriction.

         (a) The  Debentures  shall be issued to the  Property  Trustee in fully
registered  definitive form without coupons in minimum  denominations of $25 and
integral  multiples  of $25 in excess  thereof.  Principal  and  interest on the
Debentures  issued in  definitive  form will be  payable,  the  transfer of such
Debentures will be registrable  and such  Debentures  will be  exchangeable  for
Debentures bearing identical terms and provisions at the Corporate Trust Office;
provided,  however,  that  payment of interest  may be made at the option of the
Company by check mailed to the registered holder at such address as shall appear
in the Register. Notwithstanding the foregoing, so long as the registered holder
of any Debentures is the Property  Trustee,  the payment of the principal of and
interest  (including  Additional  Interest and Additional  Sums, if any) on such
Debentures  held by the Property  Trustee will be made at such place, or by wire
transfer of immediately available funds to such account, as may be designated by
the  Property  Trustee.  The Register  for the  Debentures  shall be kept at the
Corporate Trust Office,  and the Trustee is hereby  appointed  registrar for the
Debentures.

         (b) The  Debentures  may be  transferred  or exchanged  only in minimum
denominations  of $25 and integral  multiples of $25 in excess thereof,  and any
attempted transfer, sale or other disposition of Debentures in a denomination of
less than $25 shall be deemed to be void and of no legal effect whatsoever,  and
any such transferee  shall be deemed not to be the holder of such Debentures for
any purpose,  including but not limited to the receipt of payments in respect of
such  Debentures  and  such  transferee  shall  be  deemed  to have no  interest
whatsoever in such Debentures.

         2.4.  Procedure  for  Distribution  of  Debentures  to Holders of Trust
Preferred Securities; Global Debenture; Depositary. If distributed to holders of
Trust Preferred  Securities pursuant to Section 9.4 of the Trust Agreement,  the
Debentures  will be  issued  to  such  holders  in the  same  form as the  Trust
Preferred  Securities  that  such  Debentures  replace  in  accordance  with the
following procedures:

         (a) So long as Debentures are eligible for book-entry  settlement  with
the  Depositary,  the Debentures  will initially be issued in the form of one or
more registered  global  securities  without coupons ("Global  Debentures") that
will be  deposited  with,  or on  behalf  of,  a  Depositary,  who  shall be the
Depositary for the Trust Preferred Securities.  Initially,  the Depositary shall
be The Depository  Trust Company  ("DTC"),  or any successor  Depositary for the
Trust Preferred Securities,  and the Global Debenture shall be registered in the
name of DTC's nominee, Cede & Co. Except under the circumstance described below,
the Debentures will not be issuable in definitive  form.  Unless and until it is
exchanged in whole or in part for the individual Debentures represented thereby,
a Global Debenture may not be transferred  except as

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a whole by DTC to a  nominee  of DTC or by a  nominee  of DTC to DTC or  another
nominee of DTC or by DTC or any nominee of DTC to a successor  depositary or any
nominee of such successor.

         (b) So long as DTC or its nominee is the  registered  owner of a Global
Debenture,  DTC or such nominee, as the case may be, will be considered the sole
owner or holder of the Debentures  represented by such Global  Debenture for all
purposes under this Supplemental Indenture. Except as described below, owners of
beneficial  interest in Debentures  evidenced by a Global  Debenture will not be
entitled to have any of the  individual  Debentures  represented  by such Global
Debenture  registered in their names, will not receive or be entitled to receive
physical  delivery of any such  Debentures  in  definitive  form and will not be
considered   the  owners  or  holders   thereof  under  the  Indenture  or  this
Supplemental Indenture.

         (c) If DTC is at any time  unwilling,  unable or ineligible to continue
as depositary and a successor  depositary is not appointed by the Company within
90 days, the Company will issue individual Debentures in exchange for the Global
Debenture or Global Debentures  representing such Debentures.  In addition,  the
Company  may at  any  time  and  in its  sole  discretion,  subject  to  certain
limitations  set  forth  in the  Indenture,  determine  not to have  any of such
Debentures represented by one or more Global Debentures and, in such event, will
issue  individual  Debentures  in exchange  for the Global  Debenture  or Global
Debentures representing the Debentures.  Individual Debentures so issued will be
issued in denominations of $25 and integral multiples thereof.

         (d) If the Debentures are distributed to holders of the Trust Preferred
Securities  pursuant to the terms of the Trust  Agreement,  the Company will use
its best efforts to list the  Debentures on the New York Stock  Exchange or such
other  stock  exchange  or  other  organization,  if any,  on  which  the  Trust
Securities are then listed.

         (e) Each Global Debenture shall bear substantially the following legend
on the face thereof:

         UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF
         THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO ISSUER
         OR ITS AGENT FOR REGISTRATION OF TRANSFER,  EXCHANGE,  OR PAYMENT,  AND
         ANY  CERTIFICATE  ISSUED IS  REGISTERED IN THE NAME OF CEDE & CO. OR IN
         SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED  REPRESENTATIVE OF DTC
         (AND ANY  PAYMENT IS MADE TO CEDE & CO. OR TO SUCH  OTHER  ENTITY AS IS
         REQUESTED  BY AN  AUTHORIZED  REPRESENTATIVE  OF  DTC),  ANY  TRANSFER,
         PLEDGE,  OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR TO ANY PERSON
         IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO., HAS AN
         INTEREST HEREIN.

         2.5.  Interest.  (a) Each  Debenture  will bear interest at the rate of
10.125% per annum (the "Coupon Rate") from and including June 21, 2001 until the
principal thereof becomes due and payable, and will bear interest on any overdue
principal at the Coupon Rate and (to the extent that payment of such interest is
enforceable under applicable law) on any overdue  installment of interest at the
Coupon Rate ("Additional  Interest") until paid, compounded

                                      -5-
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quarterly,  payable  (subject  to the  provisions  of Article IV)  quarterly  in
arrears  on the 15th day of  September,  December,  March  and June of each year
(each,  an "Interest  Payment  Date"),  commencing  on September 15, 2001 to the
Person in whose name such  Debenture is  registered  at the close of business on
the Record Date next preceding such Interest Payment Date. The "Record Date" for
payment of interest  will be one Business Day before the Interest  Payment Date,
unless such Debenture is registered to a holder other than the Property  Trustee
or a nominee of the  Depositary,  in which case the Record  Date for  payment of
interest  will be the  fifteenth  calendar  day before the  applicable  Interest
Payment Date, whether or not a Business Day. Until  liquidation,  if any, of the
Trust,  each Debenture will be held in the name of the Property Trustee in trust
for the benefit of the holders of the Trust Securities.

         (b) The amount of  interest  payable for any period will be computed on
the basis of a 360-day year of twelve 30-day months.  In the event that any date
on which  interest  is payable on the  Debentures  is not a Business  Day,  then
payment of interest payable on such date will be made on the next succeeding day
which is a Business Day (and without any interest or other payment in respect of
any such  delay),  with the same  force  and  effect as if made on the date such
payment was originally payable.

         2.6.  Applicability  of Discharge,  Defeasance and Covenant  Defeasance
Provisions. The Discharge and Covenant Defeasance provisions in Article Thirteen
of the Base Indenture will apply to the Debentures. The Defeasance provisions in
Article Thirteen of the Base Indenture will not apply to the Debentures.

                                  ARTICLE III
                          REDEMPTION OF THE DEBENTURES

         3.1. Tax Event or Investment  Company Event Redemption.  If a Tax Event
or  Investment  Company  Event  (either a "Special  Event")  shall  occur and be
continuing,  the Company may redeem the  Debentures  at any time within 180 days
following the occurrence of that Special  Event,  in whole but not in part, at a
redemption  price (the "Special  Event  Redemption  Price") equal to 100% of the
principal  amount of the Debentures plus accrued and unpaid interest  thereon to
the Redemption Date.

         3.2. Optional Redemption by Company.  The Company shall have the option
to redeem the  Debentures  at any time on or after June 15, 2006, in whole or in
part, at a redemption price (the "Optional  Redemption  Price") equal to 100% of
the principal  amount of the Debentures plus accrued and unpaid interest thereon
to the Redemption Date.

         3.3.   Payment  of  Redemption   Price  if  Preferred   Securities  are
Book-entry.  If the Preferred  Securities are in book-entry-only  form, in order
for the Property  Trustee to meet the  obligation set forth in Section 4.2(d) of
the Trust  Agreement,  the  Company  shall  deposit  with the  Trustee an amount
sufficient to pay the Special Event Redemption Price or the Optional  Redemption
Price,  as the case may be, by 10:00 a.m.,  New York City time, on the date such
Special Event Redemption Price or Optional Redemption Price, as the case may be,
is to be paid.

                                      -6-
<PAGE>

                                   ARTICLE IV
                      EXTENSION OF INTEREST PAYMENT PERIOD

         4.1. Extension of Interest Payment Period.

         (a) So long as no  Event  of  Default  under  Section  501 of the  Base
Indenture (as  supplemented by Section 6.1 of this  Supplemental  Indenture) has
occurred and is continuing, the Company shall have the right, at any time during
the term of the  Debentures,  from time to time to defer the payment of interest
and  Additional  Sums, if any, by extending the interest  payment period of such
Debentures  for a period not exceeding 20  consecutive  quarters (an  "Extension
Period").  No Extension  Period shall extend  beyond the Stated  Maturity of the
Debentures.  To the extent  permitted  by  applicable  law,  accrued  and unpaid
interest and Additional  Sums, the payment of which has been deferred because of
an Extension  Period imposed  pursuant to this Section 4.1, will bear Additional
Interest compounded  quarterly.  At the end of the Extension Period, the Company
shall pay all interest then accrued and unpaid on the Debentures,  including any
Additional  Interest and Additional  Sums, if applicable,  to the holders of the
Debentures in whose names the  Debentures  are registered in the Register on the
first  Record  Date  preceding  the  end of the  Extension  Period.  Before  the
termination  of any Extension  Period,  the Company may elect to (i) shorten the
Extension  Period or (ii) further  extend such Extension  Period,  provided that
such period together with all such further  extensions  thereof shall not exceed
20  consecutive  quarters,  or extend  beyond the Stated  Maturity.  At any time
following the  termination  of any Extension  Period and upon the payment of any
accrued and unpaid Additional Interest and Additional Sums, if applicable,  then
due,  the  Company  may elect to begin a new  Extension  Period,  subject to the
foregoing requirements.  No interest or Additional Sums shall be due and payable
during an Extension Period, except at the end thereof.

         (b) During any such Extension Period, the Company shall not (i) declare
or pay any dividends or distributions on, or redeem, purchase, acquire or make a
liquidation  payment with respect to, any of the Company's  shares of beneficial
interest,  (ii) make any payment of principal of or interest or premium, if any,
on, or repay,  repurchase or redeem any  indebtedness  or debt securities of the
Company  that  rank on a parity  with or junior  to the  Debentures  in right of
payment or (iii) make any  guarantee  payments  with respect to any guarantee by
the Company of  indebtedness or debt securities of any Subsidiary of the Company
if such  guarantee  ranks on parity with or junior to the Debentures in right of
payment  (other than (A)  dividends or  distributions  payable  solely in Common
Stock,  (B)  any  reclassification  of any  class  of the  Company's  shares  of
beneficial  interest,  (C) any  declaration of a dividend in connection with the
implementation  of a plan  of the  Company  providing  for the  issuance  by the
Company to all  holders  of its Common  Stock of rights  entitling  the  holders
thereof to  subscribe  for or  purchase  shares of Common  Stock or any class or
series of preferred  shares,  which rights are (x) deemed to be transferred with
such shares of Common Stock, (y) issued in respect of future issuances of Common
Stock and (z) not  exercisable  until the  occurrence  of a  specified  event or
events (a "Rights Plan"), (D) the issuance of any shares of beneficial  interest
of the Company  under any Rights Plan or the  redemption  or  repurchase  of any
rights  distributed  pursuant to a Rights Plan, (E) payments under the Guarantee
relating to the Trust  Preferred  Securities,  and (F) purchases of Common Stock
issued under,  or issued  pursuant to rights issued under,  any of the Company's
benefit plans for its trustees, officers, employees,  consultants or advisors or
the  directors,  officers,  employees,  consultants or advisors of the Company's
advisor).

                                      -7-
<PAGE>

         4.2. Notice of Extension.

         (a) If the  Property  Trustee  is the  only  registered  Holder  of the
Debentures  at the time the  Company  elects  to  begin,  shorten  or  extend an
Extension  Period,  the Company  shall give written  notice to the Trust and the
Trustee of its election to begin,  shorten or extend any Extension  Period on or
before the earlier of (i) one  Business  Day before the Record Date for the next
succeeding  Interest  Payment Date or (ii) subject to  applicable  law and stock
exchange  rules,  the date the Trust is required to give notice of an  Extension
Period to the New York Stock Exchange or any other securities  exchange or other
applicable self-regulatory organization where the Trust Preferred Securities are
then listed.  The Company  shall cause the Trust to give notice of the Company's
election to begin,  shorten or extend an Extension Period to the holders of such
Trust Preferred Securities.

         (b) If the Property Trustee is not the only Holder of the Debentures at
the time the Company elects to begin, shorten or extend an Extension Period, the
Company shall give the Holders of the Debentures,  the Regular  Trustees and the
Trustee  written  notice of its  election  to  begin,  shorten  or  extend  such
Extension  Period at least 10 Business Days prior to the earlier of (i) the next
succeeding  Interest  Payment Date or (ii) subject to  applicable  law and stock
exchange  rules,  the date the Trust is required to give notice of an  Extension
Period to the New York Stock Exchange or any other securities  exchange or other
applicable self-regulatory organization where the Trust Preferred Securities are
then listed.

         (c) The quarter in which any notice is given pursuant to paragraphs (a)
or (b) of  this  Section  4.2  shall  be  counted  as one of the 20  consecutive
quarters permitted in the maximum Extension Period permitted under Section 4.1.

                                    ARTICLE V
                                    COVENANTS

         5.1. Additional  Covenants of the Company. In addition to the covenants
of the Company set forth in Article Ten of the Base  Indenture,  for the benefit
of the Holders of the Debentures:

         (a) The  Company  covenants  and agrees  (i) to  maintain  directly  or
indirectly 100% ownership of the Common Securities; provided that any successors
or assigns of the Company  permitted  by the Base  Indenture  may succeed to the
Company's ownership of the Common Securities, (ii) not to voluntarily terminate,
wind-up or liquidate the Trust,  except (A) in connection with a distribution of
the Debentures to the holders of the Trust  Preferred  Securities in liquidation
of the Trust or (B) in connection with any merger, consolidation or amalgamation
of the Trust permitted by the Trust  Agreement,  and (iii) to use its reasonable
efforts,  consistent  with the terms and provisions of the Trust  Agreement,  to
cause the Trust to  remain  classified  as a  grantor  trust for  United  States
Federal income tax purposes.

         (b) The  Company  covenants  and agrees  that if and so long as (i) the
Trustee is the Holder of all the  Debentures on behalf of the Trust and (ii) the
Company has elected, and has not revoked such election,  to pay Additional Sums,
the  Company  shall pay to the  Trust  the  Additional  Sums in  respect  of the
Preferred Securities and Common Securities.

                                      -8-
<PAGE>

                                   ARTICLE VI
                                EVENTS OF DEFAULT

         6.1.  Events of Default.  With respect to the  Debentures  issued under
this  Supplemental  Indenture,  Section  501 of the  Base  Indenture  is  hereby
replaced in its entirety as follows:

         "Event of Default" means any one of the following  events (whatever the
reason for such Event of Default  and  whether or not it shall be  voluntary  or
involuntary  or be effected  by  operation  of law or pursuant to any  judgment,
decree  or  order  of  any  court  or  any  order,  rule  or  regulation  of any
administrative or governmental body):

         (a) default in the payment of any  interest  upon the  Debentures  when
such interest  becomes due and payable,  and  continuance  of such default for a
period of 30 days, except during a during an Extension Period; or

         (b) default in the payment of the principal of the Debentures when they
become due and payable at their Maturity; or

         (c) default in the  performance  of, or breach of, any  covenant of the
Company in the Indenture  (other than a covenant a default in whose  performance
or whose breach is elsewhere  in this Section  specifically  dealt with or which
has been expressly  included in the Indenture solely for the benefit of a series
of Securities  other than the  Debentures),  and  continuance of such default or
breach for a period of 60 days after  there has been  given,  by  registered  or
certified  mail, to the Company by the Trustee or to the Company and the Trustee
by the Holders of at least a majority  in  principal  amount of the  Outstanding
Debentures a written notice  specifying  such default or breach and requiring it
to be remedied and stating that such notice is a "Notice of Default"  hereunder;
or

         (d) the Company or any Significant Subsidiary pursuant to or within the
meaning of any Bankruptcy Law (i) commences a voluntary  case,  (ii) consents to
the entry of an order for relief  against it in an  involuntary  case,  or (iii)
consents to the appointment of a Custodian of it or for all or substantially all
of its property, or

         (e) a court of competent  jurisdiction  enters an order or decree under
any  Bankruptcy  Law  that:  (i)  is  for  relief  against  the  Company  or any
Significant  Subsidiary in an involuntary case, (ii) appoints a Custodian of the
Company or any Significant  Subsidiary or for all or substantially all of either
of  its  property,  or  (iii)  orders  the  liquidation  of the  Company  or any
Significant  Subsidiary,  and the order or decree remains unstayed and in effect
for 90 days.

                                  ARTICLE VII
                           SUBORDINATION OF DEBENTURES

         Article  Fourteen  of the Base  Indenture  shall read as  follows  with
respect to Debentures issued under this Supplemental Indenture:

         14.1. Agreement to Subordinate. Each Holder of Debentures covenants and
agrees by its acceptance thereof, that the obligation of the Company to make any
payment on account of

                                      -9-
<PAGE>

the principal of and interest on the  Debentures  (the  "Obligations")  shall be
subordinate  and junior in right of payment to the Company's  obligations to the
holders of Senior Indebtedness of the Company.

         (a)  In  the  case  of  any   bankruptcy,   insolvency,   receivership,
conservatorship,  reorganization, readjustment of debt, marshaling of assets and
liabilities or similar proceedings or any dissolution, liquidation or winding-up
of or relating to the Company as a whole, whether voluntary or involuntary,  all
obligations  of  the  Company  due  or  to  become  due  to  holders  of  Senior
Indebtedness  of the Company  shall be  entitled to be paid in full,  in cash or
other permitted consideration,  or otherwise provided for, before any payment of
the Obligations shall be made by the Company.

         (b) In the event and during the  continuation of any default beyond any
grace period in the payment of principal of or interest on or any other monetary
amounts due any Senior  Indebtedness,  or in the event that any event of default
with respect to any Senior  Indebtedness  shall have  occurred and be continuing
and shall have resulted in such Senior  Indebtedness  becoming or being declared
due and payable  prior to the date on which it would  otherwise  have become due
and  payable,  unless and until such  event of  default  shall have been  cured,
waived or  remedied or shall have  ceased to exist and such  acceleration  shall
have been  rescinded or annulled or all amounts due on such Senior  Indebtedness
are paid in full in cash or other permitted consideration, or otherwise provided
for, then no payment of the Obligations shall be made by the Company.

         14.2.  When  Distribution  Must be Paid  Over.  In the  event  that the
Trustee or any Holder of Debentures receives from the Company any payment of any
Obligations  at a time  when  the  Trustee  or such  Holder  of  Debentures,  as
applicable,  has actual  knowledge  that such payment is  prohibited  by Section
14.1(a) or (b) hereof,  such payment shall be held by the Trustee or such Holder
of Debentures in trust for the benefit of, and shall be paid  forthwith over and
delivered  upon written  request to, the holders of Senior  Indebtedness  of the
Company,   as  their   interests  may  appear,   or  their  agent,   trustee  or
representative (a  "Representative")  under the indenture or other agreement (if
any) pursuant to which Senior  Indebtedness of the Company may have been issued,
as their respective  interests may appear, for application to the payment of all
obligations with respect to Senior  Indebtedness of the Company remaining unpaid
to the extent necessary to pay such obligations in full in accordance with their
terms,  after giving effect to any concurrent  payment or distribution to or for
the holders of Senior Indebtedness of the Company.

         With respect to the holders of Senior Indebtedness of the Company,  the
Trustee  undertakes to perform only such  obligations on the part of the Trustee
as are  specifically  set forth in this  Article,  and no implied  covenants  or
obligations  with respect to the holders of Senior  Indebtedness  of the Company
shall be read into this Indenture against the Trustee.  The Trustee shall not be
deemed to owe any fiduciary  duty to the holders of Senior  Indebtedness  of the
Company,  and shall not be liable to any such  holders if the Trustee  shall pay
over or  distribute  to or on behalf of Holders of  Debentures or the Company or
any other Person money or assets to which any holders of Senior  Indebtedness of
the Company shall be entitled by virtue of this Article,  except if such payment
is made as a  result  of the  willful  misconduct  or  gross  negligence  of the
Trustee.

                                      -10-
<PAGE>

         14.3. Notice By Company.  The Company shall promptly notify the Trustee
of any facts known to the Company that would cause a payment of any  Obligations
to violate  this  Article,  but failure to give such notice shall not affect the
subordination  of the  Debentures to the Senior  Indebtedness  of the Company as
provided in this Article.

         14.4.  Subrogation.  After  all  obligations  with  respect  to  Senior
Indebtedness  of the Company are paid in full, and until the Debentures are paid
in full,  Holders of Debentures  shall be subrogated to the rights of holders of
Senior Indebtedness of the Company to receive distributions applicable to Senior
Indebtedness of the Company to the extent that  distributions  otherwise payable
to the  Holders  of  Debentures  have  been  applied  to the  payment  of Senior
Indebtedness of the Company.  A distribution  made under this Article to holders
of Senior  Indebtedness  of the Company that  otherwise  would have been made to
Holders of Debentures is not, as between the Company and Holders of  Debentures,
a payment by the Company on the Securities.

         14.5.  Relative  Rights.  This Article  defines the relative  rights of
Holders of Debentures and holders of Senior Indebtedness of the Company. Nothing
in this Indenture shall:

                  (1) impair,  as between the Company and Holders of Debentures,
         the obligation of the Company, which is absolute and unconditional,  to
         pay  principal of and interest on the  Debentures  in  accordance  with
         their terms;

                  (2) affect the relative  rights of Holders of  Debentures  and
         creditors of the Company other than their rights in relation to holders
         of Senior Indebtedness of the Company; or

                  (3)  prevent  the  Trustee  or any Holder of  Debentures  from
         exercising its available remedies upon an Event of Default,  subject to
         the rights of holders and owners of Senior  Indebtedness of the Company
         to receive  distributions and payments  otherwise payable to Holders of
         Debentures.

         If the Company  fails  because of this  Article to pay  principal of or
interest on a Debenture on the due date,  unless  during an Extension  Period in
accordance  with  Section 4.1 of  Supplemental  Indenture  No. 1, the failure is
still an Event of Default.

         14.6.  Subordination  May Not Be Impaired  by Company.  No right of any
holder of Senior Indebtedness of the Company to enforce the subordination of the
Debentures  shall be impaired by any act or failure to act by the Company or any
Holder  of  Debentures  or by the  failure  of the  Company  or  any  Holder  of
Debentures to comply with this Indenture.

         14.7. Distribution or Notice to Representative. Whenever a distribution
is to be made or a  notice  given  to  holders  of  Senior  Indebtedness  of the
Company,   the   distribution  may  be  made  and  the  notice  given  to  their
Representative.

         Upon any payment or distribution  of assets of the Company  referred to
in this Article,  the Trustee and the Holders of Debentures shall be entitled to
rely upon any order or decree  made by any court of  competent  jurisdiction  or
upon any certificate of such  Representative  or of the  liquidating  trustee or
agent or other Person making any  distribution  to the Trustee or to the

                                      -11-
<PAGE>

holders for the purpose of ascertaining  the Persons  entitled to participate in
such  distribution,  the holders of the Senior  Indebtedness  of the Company and
other  indebtedness  of the  Company,  the amount or amounts  thereof or payable
thereon,  the amount or amounts paid or distributed  thereon and all other facts
pertinent thereto or to this Article.

         14.8.  Authorization  of Trustee  to  Effectuate  Subordination  of the
Debentures. Each Holder of Debentures, by its acceptance thereof, authorizes and
expressly  directs  the  Trustee  on its  behalf to take  such  action as may be
necessary  or  appropriate  to  effectuate,  as  between  the  Holders  of  such
Debentures  and  the  holders  of  Senior  Indebtedness  of  the  Company,   the
subordination  provided in this Article,  and appoints the Trustee to act as the
Holders' of Debentures attorney-in-fact for any and all such purposes.

                                  ARTICLE VIII
                                 EFFECTIVENESS

         This  Supplemental  Indenture shall be effective for all purposes as of
the date and time this Supplemental Indenture has been executed and delivered by
the  Company  and the  Trustee  in  accordance  with  Article  Nine of the  Base
Indenture.  As supplemented  hereby,  the Base Indenture is hereby  confirmed as
being in full force and effect.

                                   ARTICLE IX
                                  MISCELLANEOUS

         9.1.  Separability.  In the event any  provisions of this  Supplemental
Indenture  shall be held  invalid  or  unenforceable  by any court of  competent
jurisdiction,  such holding  shall not  invalidate or render  unenforceable  any
other provision hereof or any provision of the Indenture.

         9.2.  Supplemental  Indenture Controls. To the extent that any terms of
this Supplemental  Indenture or the Notes are inconsistent with the terms of the
Indenture,  the terms of this  Supplemental  Indenture or the Notes shall govern
and supersede such inconsistent terms.

         9.3.  Governing Law. This  Supplemental  Indenture shall be governed by
and construed in accordance with the law of the State of New York.

         9.4.  Counterparts.  This  Supplemental  Indenture  may be  executed in
several counterparts,  each of which shall be an original and all of which shall
constitute but one and the same instrument.

                                      -12-
<PAGE>

         IN WITNESS  WHEREOF,  the  Company  and the  Trustee  have  caused this
Supplemental  Indenture  to be  executed  as an  instrument  under seal in their
respective corporate names as of the date first above written.

                                           SENIOR HOUSING PROPERTIES TRUST

                                           By:  /s/ David J. Hegarty
                                                Name: David J. Hegarty
                                                Title: President

                                           STATE STREET BANK AND TRUST
                                           COMPANY, as Trustee

                                           By:  /s/ Paul D. Allen
                                                Name: Paul D. Allen
                                                Title: Vice President

<PAGE>

                                    EXHIBIT A

                 [FORM OF FACE OF JUNIOR SUBORDINATED DEBENTURE]

               10.125% Junior Subordinated Notes due June 15, 2041

                         SENIOR HOUSING PROPERTIES TRUST

No. ___                                                                 $ ___

         Senior Housing  Properties  Trust, a real estate  investment trust duly
organized and existing under the laws of Maryland  (herein called the "Company",
which  term  includes  any  successor  Person  under the  Indenture  hereinafter
referred   to),   for   value    received,    hereby    promises   to   pay   to
 ..................................., or registered assigns, the principal sum of
 ..................... Dollars on June 15, 2041.

         Reference is hereby made to the further  provisions  of this  Debenture
set forth on the reverse hereof, which further provisions shall for all purposes
have the same effect as if set forth at this place.

         In Witness  Whereof,  the Company has caused this instrument to be duly
executed.

                                          SENIOR HOUSING PROPERTIES TRUST

                                          By:_____________________________
                                                Name:
                                                Title:

Dated: _______

This is one of the Debentures of the series  designated  therein  referred to in
the within-mentioned Indenture.

STATE STREET BANK AND TRUST COMPANY,
as Trustee

By:__________________________________
      Name:
      Title:

<PAGE>

             [FORM OF REVERSE OF THE JUNIOR SUBORDINATED DEBENTURE]

                         SENIOR HOUSING PROPERTIES TRUST

            10.125% Junior Subordinated Debentures due June 15, 2041

         Capitalized terms used herein have the meanings assigned to them in the
Indenture (as defined below) unless otherwise indicated.

         1.  Indenture.  The  Company  issued its  10.125%  Junior  Subordinated
Debentures due June 15, 2041 (the "Debentures") as part of a series issued under
a Junior  Subordinated  Indenture  dated as of June 21, 2001 and a  Supplemental
Indenture No. 1 dated as of June 21, 2001  (collectively,  the "Indenture") each
between the Company and State  Street Bank and Trust  Company,  as Trustee  (the
"Trustee").  The terms of the  Debentures  include those stated in the Indenture
and those made a part of the  Indenture by reference to the Trust  Indenture Act
of 1939 as in effect on the date of the Indenture. The Debentures are subject to
all such terms,  and the Holders of the Debentures are referred to the Indenture
and the Trust Indenture Act of 1939 for a statement of such terms.  The terms of
the  Indenture  shall govern any  inconsistencies  between the Indenture and the
Debentures. The Debentures are unsecured subordinated general obligations of the
Company. The Debentures issued pursuant to said Supplemental Indenture No. 1 are
in the initial aggregate  principal amount of up to $29,639,200,  subject to the
right of the  Company  set forth in the  Indenture  to reopen the  series  which
comprises the Debentures.

         2. Interest.  Senior Housing  Properties  Trust, a Maryland real estate
investment (the "Company")  promises to pay interest on the principal  amount of
this Debenture at the rate and in the manner specified below.

         This Debenture will bear interest at the rate of 10.125% per annum (the
"Coupon  Rate") from and  including  June 21, 2001 until the  principal  thereof
becomes due and payable,  and will bear interest on any overdue principal at the
Coupon Rate and (to the extent  that  payment of such  interest  is  enforceable
under applicable law) on any overdue  installment of interest at the Coupon Rate
("Additional  Interest") until paid, compounded  quarterly,  payable (subject to
the  provisions  of the  Indenture)  quarterly  in  arrears  on the  15th day of
September,  December,  March and June of each year (each,  an "Interest  Payment
Date"),  commencing  on  September  15,  2001 to the  Person in whose  name such
Debenture  is  registered  at the  close of  business  on the  Record  Date next
preceding such Interest Payment Date.

         The  "Record  Date" for payment of interest  will be one  Business  Day
before the Interest  Payment  Date,  unless such  Debenture is  registered  to a
holder other than the Property Trustee or a nominee of the Depositary,  in which
case the Record Date for payment of interest will be the fifteenth  calendar day
before the  applicable  Interest  Payment  Date,  whether or not a Business Day.
Until liquidation, if any, of the Trust, the Debentures will be held in the name
of the  Property  Trustee in trust for the  benefit of the  holders of the Trust
Securities.

         The amount of  interest  payable for any period will be computed on the
basis of a 360-day year of twelve 30-day  months.  In the event that any date on
which  interest is payable on the

                                      A-2
<PAGE>

Debentures is not a Business Day, then payment of interest  payable on such date
will be made on the next succeeding day which is a Business Day (and without any
interest or other payment in respect of any such delay), with the same force and
effect as if made on the date such payment was originally payable.

         THE INDEBTEDNESS OF THE COMPANY EVIDENCED BY THIS DEBENTURE,  INCLUDING
THE PRINCIPAL  HEREOF AND INTEREST  HEREON,  IS, TO THE EXTENT AND IN THE MANNER
SET FORTH IN THE  INDENTURE,  SUBORDINATE  AND JUNIOR IN RIGHT OF PAYMENT TO THE
PRIOR PAYMENT IN FULL IN CASH OR OTHER PERMITTED  CONSIDERATION OF THE COMPANY'S
OBLIGATIONS  TO HOLDERS OF SENIOR  INDEBTEDNESS  OF THE COMPANY.  EACH HOLDER OF
THIS DEBENTURE,  BY ACCEPTANCE  HEREOF, (A) AGREES TO AND SHALL BE BOUND BY SUCH
PROVISIONS  OF THE  INDENTURE AND ALL OTHER  PROVISIONS  OF THE  INDENTURE,  (B)
AUTHORIZES  AND  DIRECTS THE TRUSTEE ON HIS BEHALF TO TAKE SUCH ACTION AS MAY BE
NECESSARY OR  APPROPRIATE TO EFFECTUATE  THE  SUBORDINATION  SO PROVIDED AND (C)
APPOINTS THE TRUSTEE HIS ATTORNEY-IN-FACT FOR ANY AND ALL SUCH PURPOSES.

         3. Extension of Interest Payment Period. So long as no Event of Default
under the Indenture has occurred and is  continuing,  the Company shall have the
right, at any time during the term of the Debentures, from time to time to defer
the payment of interest and  Additional  Sums, if any, by extending the interest
payment  period of such  Debenture  for a period not  exceeding  20  consecutive
quarters (an "Extension  Period").  No Extension  Period shall extend beyond the
Stated  Maturity of the Debentures.  To the extent  permitted by applicable law,
accrued and unpaid  interest and Additional  Sums, the payment of which has been
deferred because of an Extension Period imposed pursuant to the Indenture,  will
bear  Additional  Interest  compounded  quarterly.  At the end of the  Extension
Period,  the  Company  shall pay all  interest  then  accrued  and unpaid on the
Debentures,   including  any  Additional   Interest  and  Additional   Sums,  if
applicable,  to the holders of the  Debentures in whose names the Debentures are
registered  in the  Register on the first Record Date  preceding  the end of the
Extension Period.

         Before the termination of any Extension  Period,  the Company may elect
to (i) shorten  the  Extension  Period or (ii)  further  extend  such  Extension
Period,  provided  that such period  together  with all such further  extensions
thereof shall not exceed 20  consecutive  quarters,  or extend beyond the Stated
Maturity. At any time following the termination of any Extension Period and upon
the payment of any accrued and unpaid  Additional  Interest and Additional Sums,
if applicable,  then due, the Company may elect to begin a new Extension Period,
subject to the foregoing  requirements.  No interest or Additional Sums shall be
due and payable during an Extension Period, except at the end thereof.

         Subject to certain  exceptions set forth in the  Indenture,  during any
such Extension Period, the Company shall not (i) declare or pay any dividends or
distributions  on, or redeem,  purchase,  acquire or make a liquidation  payment
with respect to, any of the Company's shares of beneficial  interest,  (ii) make
any  payment of  principal  of or interest  or  premium,  if any,  on, or repay,
repurchase  or redeem any  indebtedness  or debt  securities of the Company that
rank on a parity with or junior to the  Debentures  in right of payment or (iii)
make any  guarantee  payments  with  respect to any  guarantee by the Company of
indebtedness  or  debt  securities  of any  Subsidiary  of

                                      A-3
<PAGE>

the Company if such  guarantee  ranks on parity with or junior to the Debentures
in right of payment.

         The  Company  shall give notice of its  election  to begin,  shorten or
extend an Extension Period as provided in the Indenture.

         4. Tax Event of Investment Company Event Redemption.  If a Tax Event or
Investment  Company  Event  (either  a  "Special  Event")  shall  occur  and  be
continuing,  the  Company may redeem the  Debenture  at any time within 180 days
following the occurrence of that Special  Event,  in whole but not in part, at a
redemption  price equal to 100% of the principal  amount of the Debentures  plus
accrued and unpaid interest thereon to the Redemption Date.

         5. Optional Redemption. The Company shall have the option to redeem the
Debentures  at any time on or after  June 15,  2006,  in whole or in part,  at a
redemption  price equal to 100% of the principal  amount of the Debentures  plus
accrued and unpaid interest thereon to the Redemption Date.

         6.  Denominations,   Transfer  and  Exchange.  The  Debentures  may  be
transferred  or  exchanged  only in minimum  denominations  of $25 and  integral
multiples of $25 in excess thereof,  and any attempted  transfer,  sale or other
disposition of Debentures in a denomination  of less than $25 shall be deemed to
be void and of no legal  effect  whatsoever,  and any such  transferee  shall be
deemed not to be the holder of such  Debentures  for any purpose,  including but
not limited to the receipt of  payments in respect of such  Debentures  and such
transferee shall be deemed to have no interest whatsoever in such Debentures.

         7.   Authentication.   This   Debenture   shall  not  be  valid   until
authenticated by the manual signature of the Trustee or an authenticating agent.

         8. Persons Deemed Owners.  The Company,  the Trustee,  and any agent of
the  Company  or  Trustee  may deem  and  treat  the  Person  in whose  name the
Debentures  are  registered  as the  absolute  owner for  purposes of  receiving
payment of principal and interest.

         9.  Defaults  and  Remedies.  In the case of an Event of  Default  with
respect to the Debentures  shall have occurred and be continuing,  the principal
hereof may be declared, and upon such declaration shall become, due and payable,
in the manner, with the effect and subject to the provisions provided for in the
Indenture.

         10. Actions of Holders.  The Indenture contains  provisions  permitting
the holders of not less than a majority in principal  amount of the  Debentures,
subject to certain  provisions  and exceptions as provided for in the Indenture,
to (a) waive  certain  past Events of Defaults  and their  consequences  and (b)
direct the time,  method and place of conducting  any  proceeding for any remedy
available  to the Trustee or for  exercising  any trust power  conferred  on the
Trustee.

         11.  Governing Law. This Debenture  shall be governed by, and construed
in accordance with, the laws of the State of New York.

         12. No Personal  Liability.  THE ARTICLES OF AMENDMENT AND  RESTATEMENT
ESTABLISHING SENIOR HOUSING PROPERTIES TRUST DATED

                                      A-4
<PAGE>

SEPTEMBER 20, 1999, A COPY OF WHICH,  TOGETHER WITH ALL AMENDMENTS  THERETO (THE
"DECLARATION"), IS DULY FILED IN THE OFFICE OF THE DEPARTMENT OF ASSESSMENTS AND
TAXATION  OF THE  STATE OF  MARYLAND,  PROVIDES  THAT THE NAME  "SENIOR  HOUSING
PROPERTIES  TRUST" REFERS TO THE TRUSTEES UNDER THE DECLARATION  COLLECTIVELY AS
TRUSTEES,  BUT NOT  INDIVIDUALLY  OR PERSONALLY,  AND THAT NO TRUSTEE,  OFFICER,
SHAREHOLDER,  EMPLOYEE  OR AGENT OF THE  COMPANY  SHALL BE HELD TO ANY  PERSONAL
LIABILITY,  JOINTLY OR SEVERALLY,  FOR ANY OBLIGATION OF, OR CLAIM AGAINST,  THE
COMPANY.  ALL PERSONS  DEALING WITH THE COMPANY,  IN ANY WAY, SHALL LOOK ONLY TO
THE ASSETS OF THE COMPANY FOR THE PAYMENT OF ANY SUM OR THE  PERFORMANCE  OF ANY
OBLIGATION.

                                      A-5
<PAGE>

         FOR VALUE RECEIVED, the undersigned hereby sell(s) and transfer(s) unto

_______________________________________________________________________________.

     (please insert Social Security or other identifying number of assignee)

_______________________________________________________________________________.

_______________________________________________________________________________.

_______________________________________________________________________________.

PLEASE  PRINT  OR  TYPEWRITE  NAME AND  ADDRESS,  INCLUDING  POSTAL  ZIP CODE OF
ASSIGNEE

the within Debenture and all rights thereunder,  hereby irrevocably constituting
and appointing

_______________________________________________________________________________.

_______________________________________________________________________________.

_______________________________________________________________________________.

agent to transfer said Debenture on the books of the Company, with full power of
substitution in the premises.

Dated: __________________ __, ____

NOTICE:  The  signature  to this  assignment  must  correspond  with the name as
written  upon the face of the  within  instrument  in every  particular  without
alteration or enlargement, or any change whatever.

                                      A-6EXHIBIT 4.3

              ----------------------------------------------------

                              AMENDED AND RESTATED

                                 TRUST AGREEMENT

                                      among

                           SNH CAPITAL TRUST HOLDINGS

                                   as Sponsor,

                       STATE STREET BANK AND TRUST COMPANY
                              as Property Trustee,

                                       and

                        THE REGULAR TRUSTEES NAMED HEREIN

                                   Relating to

                               SNH CAPITAL TRUST I

                            Dated as of June 21, 2001

              ----------------------------------------------------

<PAGE>

 Certain Sections of this Trust Agreement relating to Sections 310 through 318,
                 inclusive, of the Trust Indenture Act of 1939:

Trust Indenture                                                     Trust
  Act Section                                                  Agreement Section

ss.310 (a)(1)...............................................................8.7
       (a)(2)...............................................................8.7
       (a)(3)....................................................Not Applicable
       (a)(4)...............................................................2.7
       (a)(5)...............................................................8.7
       (b)..................................................................8.8
       (c).......................................................Not Applicable
ss.311 (a).................................................................8.12
       (b).................................................................8.12
       (c).......................................................Not Applicable
ss.312......................................................................5.7
ss.313 (a).................................................................8.13
       (b).......................................................Not Applicable
       (c).................................................................8.13
       (d).................................................................8.13
ss.314 (a).................................................................8.14
       (b).......................................................Not Applicable
       (c).................................................................8.15
       (d).......................................................Not Applicable
       (e)............................................................1.1, 8.15
ss.315 (a).............................................................8.1, 8.3
       (b)..................................................................8.2
       (c)..................................................................8.1
       (d).............................................................8.1, 8.3
       (e).......................................................Not Applicable
ss.316 (a).............................................................6.1, 8.2
       (b)..................................................................6.8
       (c)..................................................................6.7
ss.317 (a).............................................................2.7, 8.1
       (b)..................................................................5.9
ss.318 (a)................................................................10.10

----------------------
NOTE:    This reconciliation and tie shall not, for any purpose, be deemed to be
         part of the Trust Agreement.

<PAGE>
<TABLE>
<CAPTION>

                                                  Table of Contents

                                                                                                               Page
<S>     <C>         <C>        <C>                                                                               <C>

ARTICLE 1           DEFINED TERMS.................................................................................1
         SECTION 1.1            Definitions.......................................................................1

ARTICLE 2           ESTABLISHMENT OF THE TRUST....................................................................9
         SECTION 2.1            Name..............................................................................9
         SECTION 2.2            Principal Place of Business; Registered Agent....................................10
         SECTION 2.3            Organizational Expenses..........................................................10
         SECTION 2.4            Issuance of the Preferred Securities.............................................10
         SECTION 2.5            Subscription and Purchase of Debt Securities; Issuance of the
                                Common Securities................................................................10
         SECTION 2.6            Declaration of Trust.............................................................11
         SECTION 2.7            Authorization to Enter into Certain Transactions.................................11
         SECTION 2.8            Assets of Trust..................................................................15
         SECTION 2.9            Title to Trust Property..........................................................15

ARTICLE 3           PAYMENT ACCOUNT..............................................................................15
         SECTION 3.1            Payment Account..................................................................15

ARTICLE 4           DISTRIBUTIONS; REDEMPTION; EXCHANGE..........................................................16
         SECTION 4.1            Distributions....................................................................16
         SECTION 4.2            Redemption.......................................................................17
         SECTION 4.3            Intentionally Omitted............................................................19
         SECTION 4.4            Special Event Exchange or Redemption.............................................19
         SECTION 4.5            Subordination of Common Securities...............................................21
         SECTION 4.6            Payment Procedures...............................................................22
         SECTION 4.7            Tax Returns and Reports..........................................................22
         SECTION 4.8            Payment of Taxes, Duties, Etc., of the Trust.....................................22
         SECTION 4.9            Payments under Indenture.........................................................22

ARTICLE 5           TRUST SECURITIES CERTIFICATES................................................................22
         SECTION 5.1            Initial Ownership................................................................22
         SECTION 5.2            The Trust Securities Certificates................................................22
         SECTION 5.3            Delivery of Trust Securities Certificates........................................23
         SECTION 5.4            Registration of Transfer and Exchange of Preferred Securities;
                                Restrictions on Transfer.........................................................23
         SECTION 5.5            Mutilated, Destroyed, Lost or Stolen Trust Securities Certificates...............24
         SECTION 5.6            Persons Deemed Securityholders...................................................24
         SECTION 5.7            Access to List of Securityholders' Names and Addresses...........................25
         SECTION 5.8            Maintenance of Office or Agency..................................................25
         SECTION 5.9            Appointment of Paying Agent......................................................25
         SECTION 5.10           Ownership of Common Securities by Sponsor........................................26
         SECTION 5.11           Global Securities; Non-Global Securities; Common Securities
                                Certificate......................................................................26

</TABLE>

<PAGE>
<TABLE>
<CAPTION>

                                                  Table of Contents
                                                     (continued)
                                                                                                               Page
<S>     <C>    <C>    <C>    <C>    <C>    <C>

         SECTION 5.12           Notices to Clearing Agency.......................................................27
         SECTION 5.13           Definitive Preferred Securities Certificates.....................................27
         SECTION 5.14           Rights of Securityholders........................................................28

ARTICLE 6           ACT OF SECURITYHOLDERS; MEETINGS; VOTING.....................................................28
         SECTION 6.1            Limitations on Voting Rights.....................................................28
         SECTION 6.2            Notice of Meetings...............................................................30
         SECTION 6.3            Meetings of Preferred Securityholders............................................30
         SECTION 6.4            Voting Rights....................................................................31
         SECTION 6.5            Proxies, Etc.....................................................................31
         SECTION 6.6            Securityholder Action by Written Consent.........................................31
         SECTION 6.7            Record Date for Voting and Other Purposes........................................31
         SECTION 6.8            Acts of Securityholders..........................................................32
         SECTION 6.9            Inspection of Records............................................................33

ARTICLE 7           REPRESENTATIONS AND WARRANTIES...............................................................33
         SECTION 7.1            Representations and Warranties of the Property Trustee...........................33
         SECTION 7.2            Representations and Warranties of Sponsor........................................34

ARTICLE 8           THE TRUSTEES.................................................................................34
         SECTION 8.1            Certain Duties and Responsibilities..............................................34
         SECTION 8.2            Notice of Defaults...............................................................37
         SECTION 8.3            Certain Rights of Property Trustee...............................................38
         SECTION 8.4            Not Responsible for Recitals or Issuance of Securities...........................40
         SECTION 8.5            May Hold Securities..............................................................41
         SECTION 8.6            Compensation; Indemnity; Fees....................................................41
         SECTION 8.7            Property Trustee Required; Eligibility of Trustees...............................42
         SECTION 8.8            Conflicting Interests............................................................42
         SECTION 8.9            Resignation and Removal; Appointment of Successor................................42
         SECTION 8.10           Acceptance of Appointment by Successor...........................................43
         SECTION 8.11           Merger, Conversion, Consolidation or Succession to Business......................44
         SECTION 8.12           Preferential Collection of Claims Against Sponsor or Trust.......................44
         SECTION 8.13           Reports by Property Trustee......................................................44
         SECTION 8.14           Reports to the Property Trustee..................................................44
         SECTION 8.15           Evidence of Compliance with Conditions Precedent.................................45
         SECTION 8.16           Number of Trustees...............................................................45
         SECTION 8.17           Delegation of Power..............................................................45

ARTICLE 9           DISSOLUTION, LIQUIDATION AND MERGER..........................................................45
         SECTION 9.1            Dissolution upon Expiration Date.................................................45
         SECTION 9.2            Early Dissolution................................................................46
         SECTION 9.3            Dissolution......................................................................46
         SECTION 9.4            Liquidation......................................................................46
         SECTION 9.5            Mergers, Consolidations or Replacements of the Trust.............................48

</TABLE>

                                      (ii)
<PAGE>
<TABLE>
<CAPTION>

                                                  Table of Contents
                                                     (continued)
                                                                                                               Page
<S>     <C>         <C>        <C>                                                                              <C>

ARTICLE 10          MISCELLANEOUS PROVISIONS.....................................................................49
         SECTION 10.1           Limitation of Rights of Securityholders..........................................49
         SECTION 10.2           Amendment........................................................................49
         SECTION 10.3           Separability.....................................................................50
         SECTION 10.4           Governing Law....................................................................50
         SECTION 10.5           Payments Due on Non-Business Day.................................................50
         SECTION 10.6           Successors.......................................................................50
         SECTION 10.7           Headings.........................................................................51
         SECTION 10.8           Reports, Notices and Demands.....................................................51
         SECTION 10.9           Agreement Not to Petition........................................................51
         SECTION 10.10          Trust Indenture Act; Conflict with Trust Indenture Act...........................51
         SECTION 10.11          Acceptance of Terms of Trust Agreement, Guarantee and
                                Indenture........................................................................52
         SECTION 10.12          Counterparts.....................................................................52

EXHIBIT A - Certificate of Trust of SNH Capital Trust I

EXHIBIT B - Form of Common Securities of SNH Capital Trust I

EXHIBIT C - Form of Preferred Securities of SNH Capital Trust I

</TABLE>

                                     (iii)

<PAGE>

         AMENDED AND RESTATED TRUST  AGREEMENT,  dated as of June 21, 2001 among
(i) SNH  CAPITAL  TRUST  HOLDINGS,  a Maryland  business  trust  (including  any
successors or assigns, the "Sponsor"), (ii) State Street Bank and Trust Company,
a  Massachusetts  trust  company,  as property  trustee (in such  capacity,  the
"Property  Trustee"  and, in its  personal  capacity  and not in its capacity as
Property Trustee, the "Bank"), (iii) Gerard M. Martin, an individual,  and Barry
M.  Portnoy,  an  individual,  each  of  whose  address  is c/o  Senior  Housing
Properties  Trust,  400 Centre Street,  Newton,  Massachusetts  02458 (each,  an
"Regular Trustee" and,  collectively,  the "Regular Trustees" and,  collectively
with the  Property  Trustee,  the  "Trustees")  and (iv) the several  Holders as
hereinafter defined.

                              W I T N E S S E T H:

         WHEREAS,  the Sponsor and certain of the Trustees have  heretofore duly
declared and created a business  trust  pursuant to the Maryland  Business Trust
Act by the entering into of that certain  Declaration of Trust,  dated as of May
4, 2001 (the  "Original  Trust  Agreement"),  and by the execution and filing by
certain of the Trustees with the State Department of Assessments and Taxation of
Maryland of the Certificate of Trust, filed on May 4, 2001,  attached as Exhibit
A, for the sole purpose of issuing and selling certain  securities  representing
undivided  beneficial  interests in the assets of the Trust (as defined  herein)
and investing the proceeds  thereof in the Debt Securities (as defined  herein);
and

         WHEREAS,  the parties  hereto  desire to amend and restate the Original
Trust  Agreement in its entirety as set forth herein to provide for, among other
things,  (i) the issuance and sale of the Common  Securities (as defined herein)
by the  Trust to the  Sponsor,  (ii)  the  issuance  and  sale of the  Preferred
Securities  (as  defined  herein)  by the  Trust  pursuant  to the  Underwriting
Agreement (as defined  herein) and (iii) the  acquisition  by the Trust from the
Parent of all of the right, title and interest in the Debt Securities;

         NOW, THEREFORE,  in consideration of the agreements and obligations set
forth herein and for other good and valuable  consideration,  the sufficiency of
which is hereby  acknowledged,  each party, for the benefit of the other parties
and for the benefit of the Holders of the  Preferred  Securities,  hereby amends
and restates the Original Trust Agreement in its entirety and agrees as follows:

                                   ARTICLE 1
                                  DEFINED TERMS

         SECTION 1.1  Definitions.  For all  purposes  of this Trust  Agreement,
except as otherwise expressly provided or unless the context otherwise requires:

                  (a) the  terms  defined  in this  Article  have  the  meanings
         assigned to them in this  Article and include the plural as well as the
         singular;

                  (b) all other  terms used herein that are defined in the Trust
         Indenture  Act,  either  directly  or by  reference  therein,  have the
         meanings assigned to them therein;
<PAGE>

                  (c) unless the context otherwise requires, any reference to an
         "Article" or a "Section" refers to an Article or a Section, as the case
         may be, of this Trust Agreement; and

                  (d) the words  "herein,"  "hereof" and  "hereunder"  and other
         words of similar  import  refer to this Trust  Agreement as a whole and
         not to any particular Article, Section or other subdivision.

         "Act" has the meaning specified in Section 6.8.

         "Additional  Amount" means, with respect to the Trust  Securities,  the
amount of Additional Interest (as defined in the Indenture), if any, paid by the
Parent on the Debt Securities.

         "Additional  Sums"  means,  with respect to the Trust  Securities,  the
amount of  Additional  Sums (as defined in the  Indenture),  if any, paid by the
Parent on the Debt Securities.

         "Affiliate" of any specified  Person means any other Person directly or
indirectly  controlling  or  controlled  by or under  direct or indirect  common
control with such specified Person,  provided,  however that an Affiliate of the
Sponsor or the Parent shall be deemed not to include the Trust. For the purposes
of this  definition,  "control"  when used with respect to any specified  Person
means the power to direct the management  and policies of such Person,  directly
or indirectly,  whether through the ownership of voting securities,  by contract
or  otherwise;  and the  terms  "controlling"  and  "controlled"  have  meanings
correlative to the foregoing.

         "Applicable   Procedures"  means,  with  respect  to  any  transfer  or
transaction  involving a Global Certificate or beneficial interest therein,  the
rules and procedures of the Euroclear  system, of Clearstream  Banking,  societe
anonyme (or its  successor),  and of the Clearing  Agency for such security,  in
each case to the extent  applicable  to such  transaction  and as in effect from
time to time.

         "Bank"  has  the  meaning  specified  in the  preamble  to  this  Trust
Agreement.

         "Bankruptcy Event" means, with respect to any Person:

                  (a) such  Person,  pursuant  to or within  the  meaning of any
         Bankruptcy  Law (i)  commences a voluntary  case,  (ii) consents to the
         entry of an order for relief  against  it in an  involuntary  case,  or
         (iii)  consents to the  appointment  of a Custodian of it or for all or
         substantially all of its property, or

                  (b) a court  of  competent  jurisdiction  enters  an  order or
         decree under any  Bankruptcy  Law that:  (i) is for relief against such
         Person in an involuntary case, (ii) appoints a Custodian of such Person
         or for all or  substantially  all of its property,  or (iii) orders the
         liquidation of such Person,  and the order or decree  remains  unstayed
         and in effect for 90 days.

         "Bankruptcy  Laws" means Title 11,  United  States  Bankruptcy  Code of
1978, as amended,  or any similar United States federal or state law relating to
bankruptcy, insolvency,

                                       2
<PAGE>

receivership,  winding-up,  liquidation,  reorganization or relief of debtors or
any amendment to, succession to or change in any such law.

         "Board of  Trustees"  means either the board of trustees of the Sponsor
or any committee of that board duly authorized to act hereunder.

         "Book-Entry  Preferred  Securities  Certificates"  means  a  beneficial
interest in the Preferred  Securities  Certificates,  ownership and transfers of
which shall be made through  book  entries by a Clearing  Agency as described in
Section 5.11.

         "Business  Day" means any day other than a Saturday  or Sunday or a day
on which banking institutions in New York, New York or in Boston,  Massachusetts
are  authorized or required by law or executive  order to remain closed or a day
on which the  Corporate  Trust Office of the Property  Trustee or the  corporate
trust office of the Indenture Trustee, is closed for business.

         "Clearing  Agency"  means an  organization  registered  as a  "clearing
agency"  pursuant  to Section 17A of the  Securities  Exchange  Act of 1934,  as
amended. The Depository Trust Company will be the initial Clearing Agency.

         "Clearing  Agency  Participant"  means a broker,  dealer,  bank,  other
financial  institution  or other  Person  for whom from time to time a  Clearing
Agency effects book-entry transfers and pledges of securities deposited with the
Clearing Agency.

         "Closing  Date"  means the first Time of  Delivery  (as  defined in the
Underwriting  Agreement),  which date is also the date of execution and delivery
of this Trust Agreement.

         "Commission" means the Securities and Exchange Commission, as from time
to time  constituted,  created  under the  Securities  Exchange Act of 1934,  as
amended,  or,  if at any  time  after  the  execution  of this  instrument  such
Commission  is not existing and  performing  the duties now assigned to it under
the Trust Indenture Act, then the body performing such duties at such time.

         "Common  Securities   Certificate"   means  a  certificate   evidencing
ownership of Common Securities, substantially in the form attached as Exhibit B.

         "Common Security" means an undivided  beneficial interest in the assets
of the Trust,  having a  Liquidation  Amount  with  respect to the assets of the
Trust of $25.00 and having the rights provided therefor in this Trust Agreement,
including the right to receive  Distributions and a Liquidation  Distribution as
provided herein.

         "Common  Stock" means common  shares of beneficial  interest,  $.01 par
value per share, of the Parent.

         "Corporate Trust Office" means the principal  corporate trust office of
the  Property  Trustee  at which at any  particular  time  its  corporate  trust
business  shall be  administered,  which office at the date hereof is located at
Boston, Massachusetts, Attention: Paul D. Allen.

                                       3
<PAGE>

         "Debt  Security  Redemption  Date"  means,  with  respect  to any  Debt
Securities to be redeemed  under the  Indenture,  the date fixed for  redemption
thereof under the Indenture.

         "Debt Securities" means up to $29,639,200 aggregate principal amount of
10.125%  Junior  Subordinated  Debentures of the Parent  issued  pursuant to the
Indenture.

         "Definitive Preferred Securities Certificates" means either or both (as
the  context  requires)  of (x)  Preferred  Securities  Certificates  issued  in
certificated,  fully  registered  form as  provided  in Section  5.11(b) and (y)
Preferred Securities Certificates issued in certificated,  fully registered form
as provided in Section 5.13.

         "Direct Action" has the meaning specified in Section 6.8.

         "Distribution Date" has the meaning specified in Section 4.1(a).

         "Distributions"   means  amounts   payable  in  respect  of  the  Trust
Securities as provided in Section 4.1.

         "Early Dissolution Event" has the meaning specified in Section 9.2.

         "Event  of  Default"  means the  occurrence  of an  Indenture  Event of
Default,  whatever the reason for such Indenture Event of Default and whether it
shall be voluntary or involuntary or be effected by operation of law or pursuant
to any judgment,  decree or order of any court or any order,  rule or regulation
of any administrative or governmental body.

         "Exchange Agent" means any exchange agent appointed pursuant to Section
4.4(h).

         "Exchange Notice" has the meaning specified in Section 4.4(b).

         "Expiration Date" has the meaning specified in Section 9.1.

         "Global  Certificate"  means a Preferred Security that is registered in
the Securities Register in the name of a Clearing Agency or a nominee thereof.

         "Guarantee" means the Guarantee Agreement executed and delivered by the
Parent and State Street Bank and Trust Company,  a Massachusetts  trust company,
as guarantee trustee,  contemporaneously with the execution and delivery of this
Trust Agreement, for the benefit of the Holders of the Preferred Securities,  as
amended from time to time.

         "Holder"  means a Person in whose name a Trust  Securities  Certificate
representing  a Trust  Security is  registered,  such Person  being a beneficial
owner within the meaning of the Maryland Business Trust Act.

         "Indenture" means the Junior Subordinated  Indenture,  dated as of June
21, 2001, between the Parent and the Indenture  Trustee,  as supplemented by the
Supplemental Indenture No. 1 thereto, dated as of June 21, 2001, as the same may
be amended or supplemented from time to time.

         "Indenture  Event of Default" means an "Event of Default" as defined in
the Indenture.

                                       4
<PAGE>

         "Indenture  Trustee"  means  State  Street  Bank and Trust  Company,  a
Massachusetts trust company, as trustee under the Indenture.

         "Investment  Company Event" means the receipt by the Property  Trustee,
on behalf of the Trust, of an Opinion of Counsel,  rendered by a law firm having
a national tax and securities  practice (which Opinion of Counsel shall not have
been  rescinded  by such law  firm),  to the  effect  that,  as a result  of the
occurrence  of a change in law or regulation  or a change in  interpretation  or
application of law or regulation by any legislative  body,  court,  governmental
agency or regulatory  authority (a "Change in 1940 Act Law"), there is more than
an  insubstantial  risk that the Trust is or will be considered  an  "investment
company" that is required to be registered  under the 1940 Act,  which Change in
1940 Act Law becomes  effective on or after the date of original issuance of the
Preferred Securities under this Trust Agreement.

         "Lien" means any lien, pledge, charge,  encumbrance,  mortgage, deed of
trust, adverse ownership interest, hypothecation,  assignment, security interest
or preference,  priority or other security agreement or preferential arrangement
of any kind or nature whatsoever.

         "Liquidation  Amount" means an amount with respect to the assets of the
Trust equal to $25.00 per Trust Security.

         "Liquidation Date" means each date on which Debt Securities or cash are
to  be  distributed  to  Holders  of  Trust  Securities  in  connection  with  a
dissolution and liquidation of the Trust pursuant to Section 9.4(a).

         "Liquidation Distribution" has the meaning specified in Section 9.4(d).

         "Maryland  Business Trust Act" means Title 12 of the  Corporations  and
Associations  Article of the  Annotated  Code of Maryland,  as it may be amended
from time to time.

         "1940 Act" means the Investment Company Act of 1940, as amended.

         "Officers'  Certificate"  means a certificate signed by the Chairman of
the Board, a Trustee, a Vice Chairman of the Board, the Chief Executive Officer,
the Chief Operating  Officer,  the Chief Financial  Officer,  the President or a
Vice President,  and, by the Treasurer, an Assistant Treasurer,  the Controller,
the Secretary or an Assistant  Secretary,  of the Sponsor,  and delivered to the
Property Trustee. Any Officers' Certificate delivered with respect to compliance
with a condition or covenant provided for in this Trust Agreement shall include:

                  (a) a  statement  that  each  officer  signing  the  Officers'
         Certificate  has read the  covenant or  condition  and the  definitions
         relating  thereto;  a brief  statement  of the  nature and scope of the
         examination  or  investigation  undertaken by each officer in rendering
         the Officers' Certificate;

                  (b) a statement that each officer has made such examination or
         investigation  as, in such  officer's  opinion,  is necessary to enable
         such  officer to express an informed  opinion as to whether or not such
         covenant or condition has been complied with; and

                                       5
<PAGE>

                  (c) a  statement  as to  whether,  in the opinion of each such
         officer, such condition or covenant has been complied with.

         "Opinion of  Counsel"  means a written  opinion of counsel,  who may be
counsel for the Trust,  the Property  Trustee or the Sponsor,  and who may be an
employee of any thereof, and who shall be acceptable to the Property Trustee.

         "Optional  Redemption  Price"  means  with  respect  to  the  Preferred
Securities, 100% of the Liquidation Amounts thereof, plus accumulated and unpaid
Distributions,  if any, to the date fixed for redemption if redeemed  during the
twelve-month  period  commencing  June  15 of  each  year.  In  the  event  of a
redemption  of  Trust  Securities  upon the  occurrence  of a Tax  Event,  Trust
Securities  shall be  redeemed  at the  redemption  price of  $25.00  per  Trust
Security and all accumulated and unpaid Distributions, if any, to the date fixed
for redemption.

         "Original Trust Agreement" has the meaning specified in the recitals to
this Trust Agreement.

         "Outstanding", when used with respect to Trust Securities, means, as of
the  date of  determination,  all  Trust  Securities  theretofore  executed  and
delivered under this Trust Agreement, except:

                  (a) Trust Securities  theretofore  cancelled by the Securities
         Registrar or delivered to the Securities  Registrar for cancellation or
         tendered for conversion;

                  (b) Trust  Securities for whose payment or redemption money in
         the necessary amount has been  theretofore  deposited with the Property
         Trustee or any Paying  Agent for the Holders of such Trust  Securities;
         provided that, if such Trust  Securities are to be redeemed,  notice of
         such redemption has been duly given pursuant to this Trust Agreement;

                  (c)  Trust  Securities  which  have  been  exchanged  for Debt
         Securities pursuant to Section 4.4; and

                  (d) Trust  Securities  which have been paid or in exchange for
         or in lieu of which  other  Trust  Securities  have been  executed  and
         delivered pursuant to Section 5.5;

provided,  however,  that in  determining  whether the Holders of the  requisite
Liquidation  Amount of the Outstanding  Trust Securities have given any request,
demand,  authorization,  direction,  notice, consent or waiver hereunder,  Trust
Securities owned by the Sponsor,  any Trustee or any Affiliate of the Sponsor or
any Trustee shall be disregarded and deemed not to be  Outstanding,  except that
(a) in determining  whether any Trustee shall be fully protected in relying upon
any such request, demand,  authorization,  direction, notice, consent or waiver,
only Trust Securities that a Responsible  Officer of the Property Trustee, or an
individual  Regular  Trustee,  as the case may be, actually knows to be so owned
shall be so disregarded  and (b) the foregoing  shall not apply at any time when
all of the Outstanding Trust Securities are owned by the Sponsor, one or more of
the Regular Trustees and/or any such Affiliate.  Trust Securities so owned which
have been  pledged in good faith may be regarded as  Outstanding  if the pledgee
establishes to the

                                       6
<PAGE>

satisfaction  of the  Securities  Registrar the  pledgee's  right so to act with
respect to such Trust  Securities and that the pledgee is not the Sponsor or any
Affiliate of the Sponsor.

         "Owner" means each Person who is the  beneficial  owner of a Book-Entry
Preferred  Securities  Certificate  as  reflected in the records of the Clearing
Agency or, if a Clearing Agency  Participant is not the Owner, then as reflected
in the records of a Person  maintaining  an account  with such  Clearing  Agency
(directly or indirectly, in accordance with the rules of such Clearing Agency).

         "Parent" means Senior Housing  Properties Trust, a Maryland real estate
investment trust and its successors and assigns.

         "Paying  Agent"  means any paying agent or  co-paying  agent  appointed
pursuant to Section 5.9.

         "Payment  Account" means a segregated  non-interest  bearing  corporate
trust  account  maintained  by the  Property  Trustee with the Bank in its trust
department for the benefit of the  Securityholders  in which all amounts paid in
respect of the Debt Securities will be held and from which the Property  Trustee
shall make payments to the Securityholders in accordance with Section 4.1.

         "Person" means any individual, corporation, partnership, joint venture,
association,   joint  stock  company,   trust,   limited  liability  company  or
corporation,   unincorporated  organization  or  government  or  any  agency  or
political subdivision thereof.

         "Preferred  Securities  Certificate"  means  a  certificate  evidencing
ownership of Preferred Securities, substantially in the form attached as Exhibit
C.

         "Preferred  Security"  means an  undivided  beneficial  interest in the
assets of the Trust,  having a Liquidation  Amount with respect to the assets of
the Trust of $25.00  and  having  the  rights  provided  therefor  in this Trust
Agreement,  including  the  right to  receive  Distributions  and a  Liquidation
Distribution as provided herein.

         "Property   Trustee"  means  the  commercial   bank  or  trust  company
identified  as the  "Property  Trustee" in the preamble to this Trust  Agreement
solely  in its  capacity  as  Property  Trustee  of  the  Trust  and  not in its
individual  capacity,  or its  successor  in interest in such  capacity,  or any
successor property trustee appointed as herein provided.

         "Redemption  Date"  means,  with  respect to any Trust  Security  to be
redeemed, each Debt Security Redemption Date.

         "Redemption  Price" means,  with respect to any Trust Security,  $25.00
per Trust Security,  plus  accumulated and unpaid  Distributions  (including any
Additional Sums) to the date of redemption.

         "Regular  Trustee" means each individual  named as a Regular Trustee in
the  preamble to this Trust  Agreement,  each solely in his  capacity as Regular
Trustee  of the  Trust  and not in his  individual  capacity,  or  such  Regular
Trustee's  successor in interest in such capacity,  or any

                                       7
<PAGE>

successor  in  interest  in such  capacity,  or any  successor  Regular  Trustee
appointed as herein provided.

         "Relevant Trustee" has the meaning specified in Section 8.9.

         "Responsible  Officer" when used with respect to the Property  Trustee,
means the chairman or any vice-chairman of the board of directors,  the chairman
or any vice-chairman of the executive  committee of the board of directors,  the
chairman  of the  trust  committee,  the  president,  any  vice  president,  the
secretary,  any assistant secretary, the treasurer, any assistant treasurer, the
cashier,  any assistant  cashier,  any trust officer or assistant trust officer,
the controller or any assistant  controller or any other officer of the Property
Trustee  customarily  performing  functions similar to those performed by any of
the above  designated  officers  and also means,  with  respect to a  particular
corporate  trust  matter,  any other  officer  to whom such  matter is  referred
because of his knowledge of and familiarity with the particular subject.

         "Securities  Register" and  "Securities  Registrar" have the respective
meanings specified in Section 5.4.

         "Securityholder"  or  "Holder"  means a Person  in  whose  name a Trust
Security or Securities is registered in the Securities Register; any such Person
shall be deemed to be a  beneficial  owner  within the  meaning of the  Maryland
Business Trust Act.

         "Special Event" means a Tax Event or an Investment Company Event.

         "Sponsor"  has the  meaning  specified  in the  preamble  to this Trust
Agreement.

         "Sponsor Indemnified Person" has the meaning specified in Section 8.6.

         "Successor Property Trustee" has the meaning specified in Section 8.9.

         "Successor Securities" has the meaning specified in Section 9.5.

         "Super Majority" has the meaning specified in Section 8.2.

         "Tax Event" means the receipt by the Property Trustee, on behalf of the
Trust,  of an Opinion of Counsel,  rendered by a law firm having a national  tax
and securities  practice (which Opinion of Counsel shall not have been rescinded
by such law  firm),  to the effect  that,  as a result of any  amendment  to, or
change  (including  any  announced  prospective  change)  in,  the  laws (or any
regulations  thereunder)  of the United States or any political  subdivision  or
taxing authority  thereof or therein affecting  taxation,  or as a result of any
official  administrative  pronouncement  or judicial  decision  interpreting  or
applying  such laws or  regulations,  which  amendment or change is effective or
such  pronouncement or decision is announced on or after the date of issuance of
the Preferred  Securities under this Trust Agreement and does not pertain to the
use of the proceeds of the issuance of the Debt  Securities,  there is more than
an insubstantial risk in each case after the date thereof that (i) the Trust is,
or will be  within 90 days  after the date  thereof,  subject  to United  States
federal  income  tax with  respect  to income  received  or  accrued on the Debt
Securities,  (ii) interest  payable by the Parent on the Debt Securities is not,
or will not be, within 90 days after the date thereof,  deductible,  in whole or
in part, for United States federal

                                       8
<PAGE>

income tax  purposes  or (iii) the Trust is, or will be within 90 days after the
date  thereof,  subject to more than de minimus  amount of other taxes,  duties,
assessments or other governmental charges.

         "Trust"  means  the  Maryland   business  trust  continued  hereby  and
identified on the cover page of this Trust Agreement.

         "Trust  Agreement" means this Amended and Restated Trust Agreement,  as
the same  may be  modified,  amended  or  supplemented  in  accordance  with the
applicable provisions hereof, including all exhibits hereto,  including, for all
purposes  of this  Trust  Agreement  and any  such  modification,  amendment  or
supplement,  the  provisions of the Trust  Indenture Act that are deemed to be a
part of and govern this Trust Agreement and any such modification,  amendment or
supplement, respectively.

         "Trust Indenture Act" means the Trust Indenture Act of 1939 as in force
at the date as of which this instrument was executed; provided, however, that in
the event the Trust  Indenture  Act of 1939 is amended  after such date,  "Trust
Indenture Act" means, to the extent  required by any such  amendment,  the Trust
Indenture Act of 1939 as so amended.

         "Trust Property" means (a) the Debt Securities, (b) any cash on deposit
in, or owing to, the Payment  Account and (c) all proceeds and rights in respect
of the  foregoing  to be held by the Property  Trustee  pursuant to the terms of
this Trust Agreement for the benefit of the Securityholders.

         "Trust  Security"  means  any  one  of  the  Common  Securities  or the
Preferred Securities.

         "Trust Securities  Certificate"  means any one of the Common Securities
Certificates,  the Global  Certificates or the Definitive  Preferred  Securities
Certificates.

         "Trustees"  means,  collectively,  the Property Trustee and the Regular
Trustees.

         "Underwriting Agreement" means the Underwriting Agreement,  dated as of
June 18, 2001, among the Parent,  the Sponsor and UBS Warburg LLC, Salomon Smith
Barney Inc., A.G. Edwards & Sons, Inc., First Union Securities, Inc., Prudential
Securities  Incorporated,  Credit  Suisse  First Boston  Corporation  and Tucker
Anthony Incorporated, as representatives of the several underwriters.

                                   ARTICLE 2
                           ESTABLISHMENT OF THE TRUST

         SECTION 2.1 Name.  The Trust  continued  hereby  shall be known as "SNH
Capital  Trust I", as such name may be modified from time to time by the Regular
Trustees  following  written  notice to the Holders of Trust  Securities and the
other  Trustees,  in which name the  Trustees  may conduct  the  business of the
Trust,  make and execute  contracts and other instruments on behalf of the Trust
and sue and be sued.

                                       9
<PAGE>

         SECTION 2.2 Principal Place of Business; Registered Agent.

              (a) The address of the principal office of the Trust is c/o Senior
Housing Properties Trust, 400 Centre Street, Newton, Massachusetts 02458 or such
other  address as the Regular  Trustees may  designate by written  notice to the
Sponsor.  The address of the Maryland  office of the Trust is c/o Ballard  Spahr
Andrews & Ingersoll, LLP, 300 East Lombard Street, Baltimore,  Maryland 21202 or
such other address as the Regular  Trustees may  designate by written  notice to
the Sponsor.

              (b) The name of the  resident  agent of the  Trust in the State of
Maryland is James J. Hanks,  Jr., 300 East Lombard Street,  Baltimore,  Maryland
21202.  The resident agent is a citizen of and resides in the State of Maryland.
At any time, the Regular Trustees may designate by written notice to the Sponsor
another  resident agent who is a citizen of and resides in the State of Maryland
or which is a Maryland corporation.

         SECTION   2.3   Organizational   Expenses.   The   Sponsor   shall  pay
organizational expenses of the Trust as they arise or shall, upon request of any
Trustee,  promptly  reimburse  such Trustee for any such  expenses  paid by such
Trustee. The Sponsor shall make no claim upon the Trust Property for the payment
of such expenses.

         SECTION 2.4 Issuance of the Preferred Securities. On June 18, 2001, the
Sponsor  and the  Trust  executed  and  delivered  the  Underwriting  Agreement.
Contemporaneously  with the  execution and delivery of this Trust  Agreement,  a
Regular  Trustee,  on behalf of the  Trust,  shall  execute in  accordance  with
Section 5.2 and deliver to or at the direction of the Underwriters  named in the
Underwriting Agreement Preferred Securities Certificates, in an aggregate amount
of 1,000,000  Preferred  Securities  having an aggregate  Liquidation  Amount of
$25,000,000,  against receipt of the aggregate  purchase price of such Preferred
Securities of  $25,000,000,  which amount the Regular  Trustees  shall  promptly
deliver, or cause to be delivered,  to the Property Trustee. If the Underwriters
exercise  their  over-allotment  option  granted  pursuant  to the  Underwriting
Agreement,  then upon exercise of the  over-allotment  option in accordance with
the terms of the Underwriting  Agreement,  a Regular  Trustee,  on behalf of the
Trust,  shall  execute in  accordance  with Section 5.2 and deliver to or at the
direction of the  Underwriters  named in the  Underwriting  Agreement  Preferred
Securities  Certificates,  in an  aggregate  amount of up to 150,000  additional
Preferred  Securities  having an  aggregate  Liquidation  Amount of  $3,750,000,
against receipt of the aggregate purchase price of such Preferred  Securities of
up to $3,750,000,  which amount the Regular Trustees shall promptly deliver,  or
cause to be delivered, to the Property Trustee.

         SECTION 2.5 Subscription  and Purchase of Debt Securities;  Issuance of
the Common Securities. Contemporaneously with the execution and delivery of this
Trust Agreement,  the Regular Trustees,  on behalf of the Trust, shall subscribe
to and purchase from the Parent Debt  Securities,  registered in the name of the
Property  Trustee (in its  capacity as such) and having an  aggregate  principal
amount equal to $25,773,200, and, in satisfaction of the purchase price for such
Debt Securities,  the Property Trustee, on behalf of the Trust, shall deliver to
the  Parent  the sum of  $25,773,200.  Contemporaneously  therewith,  a  Regular
Trustee,  on behalf of the Trust,  shall execute in accordance  with Section 5.2
and deliver to the Sponsor Common Securities Certificates registered in the name
of the Sponsor,  in an aggregate  amount of 30,928 Common  Securities  having an
aggregate Liquidation Amount of $773,200 against receipt by the Property

                                       10
<PAGE>

Trustee of the  aggregate  purchase  price of such  Common  Securities  from the
Sponsor  of  the  sum  of  $773,200.   If  the   Underwriters   exercise   their
over-allotment option granted pursuant to the Underwriting Agreement,  then upon
exercise  of the  over-allotment  option  in  accordance  with the  terms of the
Underwriting  Agreement,  the Regular  Trustees,  on behalf of the Trust,  shall
subscribe to and purchase  from the Parent Debt  Securities,  registered  in the
name of the  Property  Trustee (in its capacity as such) and having an aggregate
principal  amount of up to $3,866,000 and, in satisfaction of the purchase price
for such Debt Securities,  the Property Trustee,  on behalf of the Trust,  shall
deliver to the Parent the sum of up to $3,866,000.  Contemporaneously therewith,
a Regular  Trustee,  on behalf of the Trust,  shall execute in  accordance  with
Section 5.2 and deliver to the Sponsor Common Securities Certificates registered
in the name of the  Sponsor,  in an aggregate  amount of up to 4,640  additional
Common  Securities  having an  aggregate  Liquidation  Amount of up to  $116,000
against receipt by the Property Trustee of the aggregate  purchase price of such
Common Securities from the Sponsor of the sum of up to $116,000.

         SECTION 2.6 Declaration of Trust. The exclusive  purposes and functions
of the Trust are (a) to issue and sell  Trust  Securities  and use the  proceeds
from such sale to acquire the Debt  Securities,  (b) to  distribute  the Trust's
income as provided in this Trust Agreement and (c) to engage in only those other
activities  necessary or incidental  thereto.  The Trust shall not borrow money,
issue debt or reinvest proceeds derived from investments, mortgage or pledge any
of its assets or otherwise  undertake (or permit to be undertaken)  any activity
that would cause the Trust not to be classified for United States federal income
tax purposes as a grantor  trust.  The Sponsor  hereby  appoints the Trustees as
trustees of the Trust,  to have all the rights,  powers and duties to the extent
set forth herein,  and the Trustees hereby accept such  appointment,  subject to
the terms and conditions  hereof.  The Property  Trustee hereby declares that it
will hold the Trust  Property  in trust upon and subject to the  conditions  set
forth herein for the benefit of the Trust and the  Securityholders.  The Regular
Trustees  shall have all  rights,  powers  and  duties  set forth  herein and in
accordance with applicable law with respect to accomplishing the purposes of the
Trust.

         SECTION 2.7 Authorization to Enter into Certain Transactions.

              (a) The  Trustees  shall  conduct  the  affairs  of the  Trust  in
accordance  with the terms of this Trust  Agreement.  Subject to the limitations
set forth in Section 2.6 and paragraph  (b) of this  Section,  and in accordance
with  the  following  provisions  (i) and  (ii),  the  Trustees  shall  have the
exclusive  power,  duty and the  authority  to cause  the Trust to engage in the
following activities:

                  (i) As among the Trustees, each Regular Trustee shall have the
         exclusive  power and  authority  to act on  behalf  of the  Trust  with
         respect to the following matters:

                           (A) to issue and sell the Trust Securities, provided,
                  however,  that the Trust may issue no more than one  series of
                  Preferred  Securities  and no more  than one  series of Common
                  Securities,  and,  provided,  further,  that there shall be no
                  interests  in the Trust other than the Trust  Securities,  and
                  the  issuance  of  Trust   Securities   shall  be  limited  to
                  simultaneous  issuance of both Preferred Securities and Common
                  Securities  on the Closing  Date and any other date  Preferred
                  Securities  and Common  Securities  are sold  pursuant  to the
                  over-allotment option granted to the Underwriters named in the
                  Underwriting  Agreement,  subject  to the

                                       11
<PAGE>

                  issuance  of Trust  Securities  pursuant  to  Section  5.5 and
                  Successor Securities pursuant to Section 9.5;

                           (B) to cause the Trust to enter into, and to execute,
                  deliver  and  perform  on behalf of the Trust,  a  certificate
                  depository  agreement  and  such  other  agreements  as may be
                  necessary  or  incidental  to the purposes and function of the
                  Trust;

                           (C) to assist in the  registration  of the  Preferred
                  Securities  under the Securities Act of 1933, as amended,  and
                  under state securities or blue sky laws, and the qualification
                  of this Trust  Agreement as a trust  indenture under the Trust
                  Indenture Act;

                           (D)  to  assist  in  the  listing  of  the  Preferred
                  Securities upon such securities exchange or exchanges, if any,
                  as shall be determined by the Sponsor and the  registration of
                  the Preferred  Securities under the Securities Exchange Act of
                  1934,  as  amended,  and the  preparation  and  filing  of all
                  periodic and other reports and other documents pursuant to the
                  foregoing   (only  to  the   extent   that  such   listing  or
                  registration is requested by the Sponsor);

                           (E) to appoint a Paying Agent, a Securities Registrar
                  and an  authenticating  agent in  accordance  with this  Trust
                  Agreement;

                           (F) to the extent and in the manner  provided in this
                  Trust  Agreement,  to wind up the affairs of and liquidate the
                  Trust  and to  prepare,  execute  and  file a  certificate  of
                  cancellation  with the State  Department  of  Assessments  and
                  Taxation in  accordance  with the  provisions  of the Maryland
                  Business Trust Act;

                           (G)  unless   otherwise   required  by  the  Maryland
                  Business  Trust Act or the Trust  Indenture Act, to execute on
                  behalf of the Trust (either  acting alone or together with any
                  other  Regular   Trustees)  any  documents  that  the  Regular
                  Trustees  have the power to  execute  pursuant  to this  Trust
                  Agreement;

                           (H) to take any action incidental to the foregoing as
                  the Trustees  may from time to time  determine is necessary or
                  advisable to give effect to the terms of this Trust  Agreement
                  including, but not limited to:

                           (i)      causing  the Trust not to be deemed to be an
                                    investment company required to be registered
                                    under the 1940 Act;

                           (ii)     causing  the  Trust  to  be  classified  for
                                    United States federal income tax purposes as
                                    a grantor trust; and

                           (iii)    cooperating  with the Sponsor to ensure that
                                    the  Debt  Securities  will  be  treated  as
                                    indebtedness of the Parent for United States
                                    federal income tax purposes;

                                       12
<PAGE>

                  provided  that such  action does not  adversely  affect in any
                  material  respect the interests of  Securityholders  except as
                  otherwise provided in Section 10.2(a); and

                           (I) to execute all documents or instruments,  perform
                  all duties and powers,  and do all things for and on behalf of
                  the  Trust  in all  matters  necessary  or  incidental  to the
                  foregoing.

                  (ii) As among the  Trustees,  the Property  Trustee shall have
         the  power,  duty and  authority  to act on behalf  of the  Trust  with
         respect to the following matters:

                           (A) the establishment of the Payment Account;

                           (B) the  receipt  of and  taking  title  to the  Debt
                  Securities;

                           (C) the  collection  of interest,  principal  and any
                  other  payments made in respect of the Debt  Securities in the
                  Payment Account;

                           (D) the  distribution  from  the  Trust  Property  of
                  amounts  owed to the  Securityholders  in respect of the Trust
                  Securities;

                           (E) the  exercise  of all of the  rights,  powers and
                  privileges of a holder of the Debt Securities;

                           (F) the sending of notices of default,  other notices
                  and other  information  regarding the Trust Securities and the
                  Debt Securities to the Securityholders in accordance with this
                  Trust Agreement;

                           (G)  the   distribution  of  the  Trust  Property  in
                  accordance with the terms of this Trust Agreement;

                           (H) to the extent  provided in this Trust  Agreement,
                  the winding up of the affairs of and liquidation of the Trust;

                           (I) after an Event of Default of which a  Responsible
                  Officer of the Property  Trustee has knowledge,  the taking of
                  any action incidental to the foregoing as the Property Trustee
                  may from time to time  determine  is necessary or advisable to
                  give effect to the terms of this Trust  Agreement  and protect
                  and  conserve  the  Trust  Property  for  the  benefit  of the
                  Securityholders  (without  consideration  of the effect of any
                  such action on any particular Securityholder);

                           (J) subject to this Section 2.7(a)(ii),  the Property
                  Trustee shall have none of the duties, liabilities,  powers or
                  the  authority  of the Regular  Trustees  set forth in Section
                  2.7(a)(i);

                           (K)  to  act  as  Paying  Agent   and/or   Securities
                  Registrar to the extent appointed as such hereunder; and

                           (L)  the  taking  and   holding  of  title  to  Trust
                  Property.

                                       13
<PAGE>

              (b) So long as this Trust Agreement  remains in effect,  the Trust
(or the  Trustees  acting on  behalf  of the  Trust)  shall  not  undertake  any
business,  activities  or  transaction  except as expressly  provided  herein or
contemplated  hereby.  In  particular,  notwithstanding  anything  in this Trust
Agreement to the contrary,  the Trust shall not, and the Trustees  shall not and
shall not cause the Trust to

                  (i) invest any proceeds received by the Trust from holding the
         Debt  Securities  (rather,  the  Trustees  shall  distribute  all  such
         proceeds  to the  Securityholders  pursuant  to the terms of this Trust
         Agreement and the Trust Securities),  acquire any investments or engage
         in any activities not  authorized by this Trust  Agreement,  (ii) sell,
         assign,  transfer,  exchange,  mortgage,  pledge,  set-off or otherwise
         dispose of any of the Trust Property or interests therein, including to
         Securityholders,  except as expressly  provided herein,  (iii) take any
         action  that  would  cause the Trust to fail or cease to  qualify  as a
         "grantor  trust" for United States  federal  income tax purposes,  (iv)
         make any loans or incur any  indebtedness  for borrowed  money or issue
         any other debt,  (v) take or consent to any action that would result in
         the placement of a Lien on any of the Trust Property,  (vi) possess any
         power or otherwise act in such a way as to vary the Trust assets or the
         terms of the Trust Securities in any way whatsoever except as permitted
         by the terms of this Trust Agreement,  or (vii) issue any securities or
         other evidences of beneficial  ownership of, or beneficial interest in,
         the Trust other than the Trust  Securities.  The Regular Trustees shall
         defend all claims and demands of all Persons at any time  claiming  any
         Lien on any of the Trust Property  adverse to the interest of the Trust
         or the Securityholders in their capacity as Securityholders.

              (c) In  connection  with  the  issue  and  sale  of the  Preferred
Securities,  the Sponsor shall have the right and  responsibility  to assist the
Trust with respect to, or effect on behalf of the Trust,  the following  actions
(and any actions taken by the Sponsor in furtherance  of the following  prior to
the date of this  Trust  Agreement  are hereby  ratified  and  confirmed  in all
respects):

                  (i) to file by the Trust with the Commission and to execute on
         behalf of the Trust a registration statement on the appropriate form in
         relation to the Preferred Securities, including any amendments thereto;

                  (ii) to  determine  the states and  foreign  jurisdictions  in
         which to take appropriate  action to qualify or register for resale all
         or part of the  Preferred  Securities  and to do any and all such acts,
         other  than  actions  which must be taken by or on behalf of the Trust,
         and advise  the  Trustees  of  actions  they must take on behalf of the
         Trust,  and  prepare  for  execution  and  filing any  documents  to be
         executed  and  filed by the Trust or on  behalf  of the  Trust,  as the
         Sponsor  deems  necessary  or  advisable  in order to  comply  with the
         applicable laws of any such states and foreign jurisdictions;

                  (iii) to the extent  necessary,  to prepare  for filing by the
         Trust  with the  Commission  and to  execute  on  behalf of the Trust a
         registration  statement on Form 8-A relating to the registration of the
         Preferred  Securities  under Section  12(b) or 12(g) of the  Securities
         Exchange Act of 1934, as amended,  including any amendments thereto (it
         being understood that neither the Trust, the Sponsor nor the Parent has
         any obligation under the Indenture,  the Underwriting  Agreement or the
         Trust Agreement to register any

                                       14
<PAGE>

         Trust Securities under the Securities Exchange Act of 1934, as amended,
         or to list any Trust Securities on any securities exchange);

                  (iv) to  negotiate,  and to execute and deliver,  on behalf of
         the Trust, the Underwriting Agreement; and

                  (v) any other actions necessary or incidental to carry out any
         of the foregoing activities.

                  (vi)  Notwithstanding  anything  herein to the  contrary,  the
         Regular  Trustees are authorized and directed to conduct the affairs of
         the Trust and to operate the Trust so that the Trust will not be deemed
         to be an "investment  company" required to be registered under the 1940
         Act, or taxed as a  corporation  for United States  federal  income tax
         purposes  and  so  that  the  Debt   Securities   will  be  treated  as
         indebtedness  of the  Parent  for  United  States  federal  income  tax
         purposes. In this connection,  the Sponsor and the Regular Trustees are
         authorized to take any action,  not  inconsistent  with applicable law,
         the  Certificate  of Trust or this  Trust  Agreement,  that each of the
         Sponsor and the Regular  Trustees  determines in their discretion to be
         necessary or desirable for such  purposes,  so long as such action does
         not  adversely  affect in any  material  respect the  interests  of the
         Holders of the  Preferred  Securities  except as otherwise  provided in
         Section 10.2(a).

         SECTION 2.8 Assets of Trust.  The assets of the Trust shall  consist of
only the Trust Property.

         SECTION 2.9 Title to Trust Property.  Legal title to all Trust Property
shall be vested at all times in the  Property  Trustee (in its capacity as such)
and shall be held and  administered  by the Property  Trustee for the benefit of
the Trust and the  Securityholders in accordance with this Trust Agreement.  The
Securityholders  shall  not have  legal  title to any part of the  assets of the
Trust,  but shall have an  undivided  beneficial  interest  in the assets of the
Trust.

                                    ARTICLE 3
                                 PAYMENT ACCOUNT

         SECTION 3.1 Payment Account.

              (a) On or prior to the Closing  Date,  the Property  Trustee shall
establish  the  Payment  Account.  The  Property  Trustee  and any  agent of the
Property Trustee shall have exclusive  control and sole right of withdrawal with
respect  to the  Payment  Account  for the  purpose  of making  deposits  in and
withdrawals  from the Payment Account in accordance  with this Trust  Agreement.
All monies and other property deposited or held from time to time in the Payment
Account  shall be held by the  Property  Trustee in the Payment  Account for the
exclusive  benefit  of  the  Securityholders  and  for  distribution  as  herein
provided,  including  (and  subject to) any  priority of payments  provided  for
herein.

              (b) The Property  Trustee  shall  deposit in the Payment  Account,
promptly  upon  receipt,  all  payments of  principal of or interest on, and any
other payments or proceeds with respect to, the Debt Securities. Amounts held in
the  Payment  Account  shall not be  invested by the  Property  Trustee  pending
distribution thereof.

                                       15
<PAGE>

                                   ARTICLE 4
                       DISTRIBUTIONS; REDEMPTION; EXCHANGE

         SECTION 4.1 Distributions.

              (a) Distributions on the Trust Securities shall be cumulative, and
shall accrue from the date of original issuance, or the most recent Distribution
Date (as defined herein) and, except in the event that the Parent  exercises its
right to defer the payment of interest  on the Debt  Securities  pursuant to the
Indenture,  shall be payable  quarterly  in  arrears on each March 15,  June 15,
September 15 and  December 15 of each year,  commencing  on  September  15, 2001
(which dates correspond to the interest  payment dates on the Debt  Securities),
when,  as and if  available  for  payment by the  Property  Trustee,  as further
described  in  paragraph  (c)  of  this  Section  4.1.  If  any  date  on  which
Distributions  are otherwise  payable on the Trust  Securities is not a Business
Day, then the payment of such Distributions shall be made on the next succeeding
day which is a Business  Day (and no interest  shall  accrue for the period from
and after such date until the next succeeding  Business Day) with the same force
and effect as if made on such date (each date on which Distributions are payable
in accordance with this Section 4.1(a), a "Distribution Date").

              (b) The Trust Securities  represent undivided beneficial interests
in the Trust Property,  and the  Distributions  on the Trust Securities shall be
payable at a rate of 10.125%  per annum of the  Liquidation  Amount of the Trust
Securities,  such rate being the rate of interest payable on the Debt Securities
to be held by the Property Trustee. The amount of Distributions  payable for any
period shall be computed on the basis of a 360-day year of twelve 30-day months.
For periods less than a full month, Distributions shall reflect interest on Debt
Securities  computed  on the basis of the  number  of  elapsed  days  based on a
360-day year of twelve 30-day months.  The amount of  Distributions  payable for
any period shall include the Additional Amounts, if any.

              (c)  Distributions  on the Trust  Securities  shall be made by the
Property  Trustee  from  the  Payment  Account  and  shall  be  payable  on each
Distribution  Date only to the extent  that the Trust has funds then on hand and
available in the Payment Account for the payment of such Distributions.

              (d)  Distributions  on the  Trust  Securities  with  respect  to a
Distribution  Date shall be payable to the Holders thereof as they appear on the
Securities  Register for the Trust Securities on the relevant record date, which
shall be the date which is one Business Day before such Distribution Date if the
Preferred  Securities  are in the  form  of a  Global  Certificate,  unless  the
Preferred Securities are no longer in the form of a Global Certificate, in which
case the relevant  record date with respect to a Distribution  Date shall be the
date which is 15 days before such  Distribution  Date (whether or not a Business
Day).

                                       16
<PAGE>

         SECTION 4.2 Redemption.

              (a) Upon an optional redemption (as set forth in the Indenture) of
Debt  Securities,  the proceeds from such redemption  shall be applied to redeem
Trust Securities having an aggregate  Liquidation  Amount equal to the aggregate
principal  amount of the Debt  Securities  so redeemed by the Parent,  including
pursuant to Section 4.4, at the Optional  Redemption Price, and upon a mandatory
redemption (as set forth in the Indenture) of Debt Securities, the proceeds from
such redemption shall be applied to redeem Trust Securities, having an aggregate
Liquidation  Amount  equal  to  the  aggregate  principal  amount  of  the  Debt
Securities so redeemed by the Parent, at the Redemption Price. The Trust may not
redeem fewer than all the Outstanding  Trust  Securities  unless all accrued and
unpaid  Distributions  have been paid on all Trust  Securities for all quarterly
Distribution periods terminating on or prior to the date of redemption.

              (b) Notice of redemption (which notice will be irrevocable)  shall
be given by the Property Trustee by first-class  mail,  postage prepaid,  mailed
not less  than 30 nor more  than 60 days  prior  to the  Redemption  Date to the
Sponsor and each Holder of Trust  Securities  to be redeemed,  at such  Holder's
address as it appears in the  Securities  Register.  All  notices of  redemption
shall state:

                  (i) the Redemption Date;

                  (ii) the Redemption Price or the Optional Redemption Price, as
         the case may be;

                  (iii)  the  record  date  for  the  determination  of  Holders
         entitled  to  receive  payment  of the  Redemption  Price  or  Optional
         Redemption Price, as the case may be, as provided in Section 4.2(d);

                  (iv) the CUSIP number;

                  (v) if less than all of the Outstanding  Trust  Securities are
         to be redeemed, the identification and the aggregate Liquidation Amount
         of the particular Trust Securities to be redeemed; and

                  (vi) that on the Redemption  Date, the Redemption Price or the
         Optional  Redemption  Price,  as the case may be,  will  become due and
         payable  upon  each  such  Trust  Security  to  be  redeemed  and  that
         Distributions  thereon will cease to accrue on and after said date; and
         the place or places where such Trust  Securities  are to be surrendered
         for payment of the Redemption Price or the Optional  Redemption  Price,
         as the case may be.

              (c) The Trust Securities redeemed on each Redemption Date shall be
redeemed at the Redemption Price or the Optional  Redemption  Price, as the case
may  be,  with  the  proceeds  from  the  contemporaneous   redemption  of  Debt
Securities. Redemptions of the Trust Securities shall be made and the Redemption
Price or the Optional  Redemption Price, as the case may be, shall be payable on
each  Redemption  Date only to the extent  that the Trust has

                                       17
<PAGE>

funds then on hand and available in the Payment  Account for the payment of such
Redemption Price or the Optional Redemption Price, as the case may be.

              (d) If the  Property  Trustee  gives a  notice  of  redemption  in
respect of any Preferred Securities, then, by 12:00 noon, New York City time, on
the Redemption  Date,  subject to Section 4.2(c),  the Property Trustee will, so
long as and to the extent the Preferred Securities are in book-entry-only  form,
irrevocably deposit with the Clearing Agency for the Preferred  Securities funds
sufficient to pay the applicable  Redemption Price. If the Preferred  Securities
are no longer in book-entry only form, the Property Trustee,  subject to Section
4.2(c),  will irrevocably  deposit with the Paying Agent funds sufficient to pay
the applicable  Redemption Price or Optional  Redemption  Price, as the case may
be, on such Preferred  Securities  held in  certificated  form and will give the
Paying Agent irrevocable  instructions and authority to pay the Redemption Price
or the Optional  Redemption  Price,  as the case may be, to the Holders  thereof
upon surrender of their Preferred Securities  Certificates.  Notwithstanding the
foregoing,  Distributions  payable  on or prior to the  Redemption  Date for any
Trust  Securities  called for redemption shall be payable to the Holders of such
Trust  Securities  as they  appear  on the  Securities  Register  for the  Trust
Securities on the relevant record dates for the related  Distribution  Dates. If
notice of  redemption  shall have been given and funds  deposited  as  required,
then, upon the date of such deposit, all rights of Securityholders holding Trust
Securities  so  called  for  redemption  will  cease,  except  the right of such
Securityholders  to receive  the  Redemption  Price or the  Optional  Redemption
Price, as the case may be, but without interest;  and such Trust Securities will
cease to be  Outstanding.  In the event  that any date on which  any  Redemption
Price or the Optional  Redemption Price, as the case may be, is payable is not a
Business Day, then payment of the  Redemption  Price or the Optional  Redemption
Price,  as the  case  may be,  payable  on such  date  will be made on the  next
succeeding  day which is a  Business  Day (and  without  any  interest  or other
payment  in respect of any such  delay),  in each case,  with the same force and
effect as if made on such date.  Payment of the Redemption Price or the Optional
Redemption Price, as the case may be, shall be made to the Holders of such Trust
Securities as they appear on the Securities Register for the Trust Securities on
the relevant record date, which for so long as the Preferred  Securities  remain
in book-entry  form only shall be the date which is one Business Day before such
Redemption  Date. If the Preferred  Securities are no longer in book-entry  form
only, the relevant record date shall be the fifteenth day before such Redemption
Date (whether or not a Business Day).

              (e) If less than all the  Outstanding  Trust  Securities are to be
redeemed on a Redemption  Date, then the aggregate  Liquidation  Amount of Trust
Securities  to be  redeemed  shall be  allocated  on a pro rata basis  (based on
Liquidation  Amounts) among the Common  Securities and the Preferred  Securities
that are to be redeemed.  The  particular  Preferred  Securities  to be redeemed
shall be  selected  not more than 60 days  prior to the  Redemption  Date by the
Property Trustee from the Outstanding Preferred Securities not previously called
for  redemption,  by lot or by such other method as the Property  Trustee  shall
deem fair and appropriate and which may provide for the selection for redemption
of  portions  (equal  to  $25.00  or an  integral  multiple  of $25.00 in excess
thereof) of the  Liquidation  Amount of the Preferred  Securities.  The Property
Trustee  shall  promptly  notify  the  Securities  Registrar  in  writing of the
Preferred  Securities  selected for redemption and, in the case of any Preferred
Securities selected for partial redemption, the Liquidation Amount thereof to be
redeemed;  it  being  understood  that,  in the  case  of  Preferred  Securities
registered  in the name of and held of record  by the  Clearing

                                       18
<PAGE>

Agency (or any successor) or any nominee,  the  distribution  of the proceeds of
such  redemption  will be made in accordance with the procedures of the Clearing
Agency or its  nominee.  For all  purposes of this Trust  Agreement,  unless the
context  otherwise  requires,  all  provisions  relating  to the  redemption  of
Preferred  Securities  shall  relate,  in the case of any  Preferred  Securities
redeemed  or to be  redeemed  only in part,  to the  portion of the  Liquidation
Amount of Preferred Securities which has been or is to be redeemed. In the event
of any  redemption  in part,  the Trust  shall  not be  required  to (i)  issue,
register the transfer of or exchange of any Preferred  Security  during a period
beginning at the opening of business 15 days before any selection for redemption
of Preferred Securities and ending at the close of business on the earliest date
in which the relevant  notice of  redemption is deemed to have been given to all
Holders of Preferred  Securities to be so redeemed or (ii) register the transfer
of or exchange of any Preferred Securities so selected for redemption,  in whole
or in part, except for the unredeemed portion of any Preferred  Securities being
redeemed in part.

              (f) In the  event  of  any  redemption,  the  Trust  shall  not be
required to issue,  register  the  transfer of or register  the  exchange of any
Preferred  Security during a period beginning at the opening of business 15 days
before  any  Redemption  Date  and  ending  at the  close  of  business  on such
Redemption Date.

         SECTION 4.3 Intentionally Omitted.

         SECTION 4.4 Special Event Exchange or Redemption.

              (a) If a Special Event shall occur and be  continuing,  and unless
the Outstanding Trust Securities are otherwise  redeemed pursuant to Section 4.2
hereof,  the Property  Trustee  shall direct the Exchange  Agent to exchange all
Outstanding Trust Securities for Debt Securities having a principal amount equal
to the aggregate  Liquidation Amount of the Trust Securities to be exchanged and
with accrued interest in an amount equal to any unpaid  Distribution  (including
any Additional Amounts) on the Trust Securities; provided, however, that, in the
case of a Tax Event,  the  Sponsor  shall have the right to (i) direct that less
than all, or none, as  appropriate,  of the Trust  Securities be so exchanged if
and for so long as the Parent shall have elected to pay any Additional Sums such
that the amount  received by Holders of Trust  Securities  not so  exchanged  in
respect of Distributions and other  distributions are not reduced as a result of
such Tax Event,  and shall not have revoked any such  election or failed to make
such  payments or (ii) cause the Trust  Securities  to be redeemed in the manner
set forth below. If a Tax Event shall occur and be continuing,  the Parent shall
have the right,  upon not less than 30 nor more than 60 days' notice,  to redeem
the  Debt  Securities,  in  whole  but not in part,  for  cash  within  180 days
following the occurrence and continuation of such Tax Event.  Promptly following
such redemption,  Trust Securities with an aggregate Liquidation Amount equal to
the  aggregate  principal  amount of the Debt  Securities  so  redeemed  will be
redeemed  by the  Trust at the  Redemption  Price  applicable  in the event of a
redemption upon the occurrence of a Tax Event on a pro rata basis.

              (b)  Notice  of any  exchange  pursuant  to this  Section  4.4 (an
"Exchange  Notice") of the Trust  Securities,  which  Exchange  Notice  shall be
irrevocable,  will be given by the Property  Trustee by first-class  mail to the
Sponsor and to each record Holder of Trust  Securities to be exchanged not fewer
than 30 nor more than 60 days prior to the date fixed for exchange thereof.  For
purposes  of the  calculation  of the date of  exchange  and the  dates on which

                                       19
<PAGE>

notices are given pursuant to this  paragraph  (b), an Exchange  Notice shall be
deemed to be given on the day such notice is first mailed by  first-class  mail,
postage prepaid, to each Holder. Each Exchange Notice shall be addressed to each
Holder of Trust  Securities  at the  address  of such  Holder  appearing  in the
Securities  Register.  Each Exchange Notice shall state:  (A) the exchange date;
(B) the aggregate Liquidation Amount and any unpaid Distributions (including any
Additional  Amounts) on the Trust  Securities  to be exchanged and the aggregate
principal amount and any accrued interest on the Debt Securities to be exchanged
therefor;  (C) that on the exchange date the Trust Securities to be so exchanged
shall be  exchanged  for Debt  Securities  and that  Distributions  on the Trust
Securities so exchanged will cease to accumulate on and after said date; (D) the
record date for the determination of Holders of Trust Securities to be exchanged
as provided in Section  4.4(g);  and (E) the identity of the Exchange  Agent, if
any, and the place or places where each Trust  Certificate to be exchanged is to
be surrendered in exchange for Debt Securities. No defect in the Exchange Notice
or in the mailing  thereof with respect to any Trust  Security  shall affect the
validity of the exchange proceedings for any other Trust Security.

              (c) In the event  that fewer  than all the  Outstanding  Preferred
Securities  are to be exchanged,  then, on the exchange  date, (i) if all of the
Outstanding   Preferred  Securities  are  represented  by  Definitive  Preferred
Securities  Certificates,  the particular  Preferred  Securities to be exchanged
will  be  selected  by the  Property  Trustee  from  the  Outstanding  Preferred
Securities not previously called for redemption or exchange on a pro rata basis,
and (ii) if all of the  Outstanding  Preferred  Securities  are  represented  by
Book-Entry Preferred Securities Certificates, the Property Trustee shall provide
for  the  selection  for  exchange  of  a  portion  of  the  Global  Certificate
representing  the Book-Entry  Preferred  Securities  Certificates  on a pro rata
basis.  In the case of clause (ii) above,  the particular  Book-Entry  Preferred
Securities Certificates to be exchanged shall be selected in accordance with the
applicable  rules and procedures for the Clearing Agency in whose name, or whose
nominee's name, such Global  Certificate is then held. Any Preferred  Securities
Certificate  that is to be exchanged only in part shall be surrendered  with due
endorsement or by a written  instrument of transfer fully executed by the Holder
thereof (or its attorney duly authorized in writing) and the Trust shall prepare
and deliver to such Holder,  without service charge, a new Preferred  Securities
Certificate or Certificates in aggregate stated Liquidation Amount equal to, and
in exchange for, the unredeemed portion of the Preferred Securities  Certificate
so surrendered. The Common Securities shall be exchanged in a similar manner.

              (d) In the event of an exchange  pursuant to this  Section 4.4, on
the date  fixed  for any such  exchange,  (i) if the  Preferred  Securities  are
represented by Book-Entry Preferred Securities Certificates, the Clearing Agency
or its nominee, as the record Holder of the Preferred Securities,  will exchange
through the Exchange  Agent the Global  Certificate  representing  the Preferred
Securities to be exchanged for a registered  Global  Certificate or certificates
representing the Debt Securities to be delivered upon such exchange, (ii) if the
Preferred   Securities  are  represented  by  Definitive   Preferred  Securities
Certificates,  the certificates  representing the Preferred  Securities to be so
exchanged will be deemed to represent Debt Securities  having a principal amount
equal to the aggregate stated  Liquidation  Amount of such Preferred  Securities
until such  certificates  are  presented to the Exchange  Agent for exchange for
definitive certificates representing Debt Securities and (iii) all rights of the
Holders of the  Preferred  Securities  so exchanged  will cease,  except for the
right of such Holders to receive Debt Securities. The Common Securities shall be
exchanged in a similar manner.

                                       20
<PAGE>

              (e) Each  Holder,  by  becoming  a party to this  Trust  Agreement
pursuant to Section 10.11 of this Trust Agreement, will be deemed to have agreed
to be bound by these  exchange  provisions  in regard to the  exchange  of Trust
Securities for Debt Securities pursuant to the terms described above.

              (f) Nothing in this Section 4.4 shall limit the requirement of the
Trust to withhold taxes pursuant to the terms of the Trust  Securities or as set
forth in this Trust Agreement or otherwise  require the Property  Trustee or the
Trust to pay any amounts on account of such withholdings.

              (g) An exchange of Trust  Securities for Debt Securities  pursuant
to this Section 4.4 shall be made to Holders of Trust  Securities as they appear
on the  Securities  Register for Trust  Securities on the relevant  record date,
which for so long as the Preferred  Securities  remain in  book-entry  form only
shall be the date which is one  Business Day before the  exchange  date.  If the
Preferred  Securities are no longer in book-entry form only, the relevant record
date shall be the  fifteenth  day before the  exchange  date  (whether  or not a
Business Day).

              (h) If a Special  Event shall occur and be  continuing,  the Trust
shall  maintain an office or agency  (the  "Exchange  Agent")  for the  purposes
specified  in this  Section  4.4.  The Regular  Trustees may remove any Exchange
Agent if such Trustees  determine in their sole discretion that the Paying Agent
shall have failed to perform its  obligations  under this Trust Agreement in any
material  respect.  The Exchange Agent shall initially be the Property  Trustee.
Any Person  acting as Exchange  Agent shall be  permitted  to resign as Exchange
Agent upon 30 days'  written  notice to the  Property  Trustee and the  Sponsor;
provided,  however,  that no such  resignation  of the  Exchange  Agent shall be
effective  until a successor  Exchange Agent has been appointed and has accepted
such  appointment by instrument  executed by such  successor  Exchange Agent and
delivered to the Trust,  the Sponsor and the resigning  Exchange  Agent.  In the
event  that the  Property  Trustee  shall no longer be the  Exchange  Agent or a
successor  Exchange  Agent shall resign or its authority to act be revoked,  the
Regular  Trustees  shall appoint a successor  that is acceptable to the Property
Trustee and the Sponsor to act as Exchange  Agent.  The  provisions  of Sections
8.1,  8.3 and 8.6  shall  apply  to the  Property  Trustee  also in its  role as
Exchange Agent,  for so long as the Property Trustee shall act as Exchange Agent
and, to the extent applicable, to any other exchange agent appointed hereunder.

         SECTION   4.5   Subordination   of  Common   Securities.   Payment   of
Distributions   (including  Additional  Amounts,  if  applicable)  on,  and  the
Redemption Price of, the Trust Securities, as applicable, shall be made pro rata
based on the Liquidation Amount of the Trust Securities; provided, however, that
if on any  Distribution  Date or Redemption  Date an Event of Default shall have
occurred and be continuing, no payment of any Distribution (including Additional
Amounts, if applicable) on, or the Redemption Price of, any Common Security, and
no other payment on account of the redemption,  liquidation or other acquisition
of  Common  Securities,  shall  be made  unless  payment  in full in cash of all
accumulated  and  unpaid   Distributions   (including   Additional  Amounts,  if
applicable) on all Outstanding Preferred Securities for all Distribution periods
terminating  on or prior  thereto,  or in the case of payment of the  Redemption
Price the full  amount of such  Redemption  Price on all  Outstanding  Preferred
Securities  to be redeemed,  shall have been made or provided for, and all funds
immediately  available  to the  Property  Trustee  shall first be applied to the
payment in full in cash of all

                                       21
<PAGE>

Distributions   (including   Additional  Amounts,  if  applicable)  on,  or  the
Redemption Price of, Preferred Securities then due and payable.

         SECTION 4.6 Payment  Procedures.  Payments in respect of the  Preferred
Securities  shall be made by check mailed to the address of the Person  entitled
thereto as such  address  shall  appear on the  Securities  Register  or, if the
Preferred  Securities are held by a Clearing Agency, such Distributions shall be
made to the Clearing Agency in immediately  available  funds, in accordance with
the applicable certificate  depositary agreement on the applicable  Distribution
Dates. Payments in respect of the Common Securities shall be made in such manner
as shall be mutually  agreed between the Property  Trustee and the Holder of the
Common Securities.

         SECTION 4.7 Tax Returns and Reports. The Regular Trustees shall prepare
(or cause to be prepared),  at the Sponsor's expense, and file all United States
federal,  state and local tax and information returns and reports required to be
filed by or in respect of the Trust. In this regard,  the Regular Trustees shall
(a)  prepare  and file (or  cause to be  prepared  or  filed)  Form  1041 or the
appropriate Internal Revenue Service form required to be filed in respect of the
Trust in each taxable year of the Trust and (b) prepare and furnish (or cause to
be prepared and furnished) to each Securityholder a Form 1099 or the appropriate
Internal Revenue Service form required to be furnished to such Securityholder or
the information required to be provided on such form. The Regular Trustees shall
provide  the Sponsor  with a copy of all such  returns,  reports  and  schedules
promptly after such filing or furnishing.  The Trustees shall comply with United
States  federal  withholding  and backup  withholding  tax laws and  information
reporting requirements with respect to any payments to Securityholders under the
Trust Securities.

         SECTION 4.8 Payment of Taxes,  Duties, Etc., of the Trust. Upon receipt
under the Debt Securities of Additional Sums, the Property Trustee, upon receipt
of written notice from the Sponsor or the Regular  Trustees,  shall promptly pay
from  such  Additional  Sums  any  taxes,  duties  or  governmental  charges  of
whatsoever  nature (other than  withholding  taxes)  imposed on the Trust by the
United States or any other taxing authority.

         SECTION 4.9 Payments under Indenture.  Any amount payable  hereunder to
any  Holder  of  Preferred  Securities  shall be  reduced  by the  amount of any
corresponding  payment  such  Holder (or any Owner  with  respect  thereto)  has
directly  received  pursuant to Section 503 of the Indenture in accordance  with
the terms of Section 6.8 hereof.

                                   ARTICLE 5
                          TRUST SECURITIES CERTIFICATES

         SECTION 5.1 Initial Ownership. Upon the creation of the Trust and until
the  issuance of the Trust  Securities,  and at any time  during  which no Trust
Securities are  Outstanding,  the Sponsor shall be the sole beneficial  owner of
the Trust.

         SECTION 5.2 The Trust Securities Certificates. The Preferred Securities
Certificates  shall be issued in  minimum  denominations  of $25.00  Liquidation
Amount  and  integral  multiples  of $25.00 in excess  thereof,  and the  Common
Securities  Certificates  shall be issued in denominations of $25.00 Liquidation
Amount and integral multiples thereof.  The consideration  received by the Trust
for the issuance of the Trust  Securities shall constitute a contribution to the
capital of the Trust and shall not  constitute  a loan to the  Trust.  The Trust
Securities  Certificates

                                       22
<PAGE>

shall be executed on behalf of the Trust by manual or facsimile  signature of at
least one Regular Trustee and authenticated by the Property  Trustee.  Preferred
Securities  initially  will  be  represented  by one  or  more  certificates  in
registered   global  form  (the   "Global   Certificates").   Trust   Securities
Certificates bearing the manual or facsimile signatures of individuals who were,
at the time when such signatures shall have been affixed,  authorized to sign on
behalf of the Trust, shall be validly issued and entitled to the benefit of this
Trust Agreement, notwithstanding that such individuals or any of them shall have
ceased  to be so  authorized  prior to the  delivery  of such  Trust  Securities
Certificates  or did not hold such offices at the date of delivery of such Trust
Securities  Certificates.  A transferee of a Trust Securities  Certificate shall
become a Securityholder,  and shall be entitled to the rights and subject to the
obligations of a Securityholder  hereunder,  upon due registration of such Trust
Securities  Certificate  in such  transferee's  name pursuant to Section 5.4. By
acceptance of a Preferred Security,  each  Securityholder  covenants for federal
income tax purposes to treat the Debt  Securities as  indebtedness of the Parent
and to treat the  Preferred  Securities  as evidence of a  beneficial  ownership
interest in the Debt Securities through a grantor trust.

         SECTION 5.3 Delivery of Trust Securities  Certificates.  On the Closing
Date, the Regular  Trustees  shall cause Trust  Securities  Certificates,  in an
aggregate Liquidation Amount as provided in Sections 2.4 and 2.5, to be executed
on  behalf  of the  Trust  and  delivered  to or upon the  written  order of the
Sponsor,  signed by one of its trustees or any duly authorized  officer, if any,
without further trust action by the Sponsor, in authorized denominations.

         A Trust Security  Certificate shall not be valid until authenticated by
the manual  signature of an authorized  signatory of the Property  Trustee.  The
signature shall be conclusive  evidence that the Trust Security  Certificate has
been authenticated under this Trust Agreement. Upon a written order of the Trust
signed by one Regular Trustee, the Property Trustee shall authenticate the Trust
Security Certificates for original issue.

         The Property Trustee may appoint an authenticating  agent acceptable to
the  Regular   Trustees  to  authenticate   Trust  Security   Certificates.   An
authenticating agent may authenticate Trust Security  Certificates  whenever the
Property  Trustee  may  do  so.  Each  reference  in  this  Trust  Agreement  to
authentication by the Property Trustee includes authentication by such agent. An
authenticating  agent has the same rights as the  Property  Trustee to deal with
the  Sponsor  or an  Affiliate  with  respect  to the  authentication  of  Trust
Securities.

         SECTION  5.4   Registration  of  Transfer  and  Exchange  of  Preferred
Securities;  Restrictions on Transfer. The securities registrar (the "Securities
Registrar")  shall keep or cause to be kept, at the office or agency  maintained
pursuant to Section  5.8, a securities  register (a  "Securities  Register")  in
which,  subject  to  such  reasonable  regulations  as  it  may  prescribe,  the
Securities  Registrar shall provide for the registration of Preferred Securities
Certificates and Common Securities  Certificates (subject to Section 5.10 in the
case of the Common  Securities  Certificates)  and registration of transfers and
exchanges of Preferred Securities  Certificates as herein provided. The Property
Trustee shall be the initial Securities Registrar.

         Upon surrender for  registration of transfer of any Preferred  Security
at an office  or  agency of the  Securities  Registrar  designated  pursuant  to
Section 5.8 for such purpose,  a Regular  Trustee shall execute on behalf of the
Trust  by  manual  or  facsimile  signature,  and  the  Property  Trustee  shall
authenticate  and  deliver,  in  the  name  of  the  designated   transferee  or
transferees,   one

                                       23
<PAGE>

or more new Preferred  Securities of any authorized  denominations and of a like
aggregate Liquidation Amount.

         At the option of the  Holder,  and subject to the other  provisions  of
this Section 5.4,  Preferred  Securities  may be exchanged  for other  Preferred
Securities of any authorized denomination and of a like Liquidation Amount, upon
surrender  of the  Preferred  Securities  to be  exchanged at any such office or
agency.  Whenever any Preferred  Securities are so surrendered  for exchange,  a
Regular  Trustee  shall  execute  on behalf of the Trust by manual or  facsimile
signature,  and  the  Property  Trustee  shall  authenticate  and  deliver,  the
Preferred  Securities  which the  Holder  making the  exchange  is  entitled  to
receive.

         All Preferred  Securities  issued upon any  registration of transfer or
exchange of Preferred  Securities  shall be entitled to the same benefits  under
this  Trust  Agreement  as  the  Preferred  Securities   surrendered  upon  such
registration of transfer or exchange.

         Every Preferred  Security  presented or surrendered for registration of
transfer or for exchange shall (if so requested by the Sponsor or the Securities
Registrar)  be duly  endorsed,  or be  accompanied  by a written  instrument  of
transfer in form  satisfactory to the Sponsor and the Securities  Registrar duly
executed, by the Holder thereof or his attorney duly authorized in writing.

         No service  charge  shall be made for any  registration  of transfer or
exchange of Preferred Securities Certificates,  but the Securities Registrar may
require payment of a sum sufficient to cover any tax or governmental charge that
may be  imposed  in  connection  with any  transfer  or  exchange  of  Preferred
Securities Certificates.

         SECTION  5.5  Mutilated,  Destroyed,  Lost or Stolen  Trust  Securities
Certificates.  If (a)  any  mutilated  Trust  Securities  Certificate  shall  be
surrendered to the Securities  Registrar,  or if the Securities  Registrar shall
receive evidence to its  satisfaction of the  destruction,  loss or theft of any
Trust Securities  Certificate and (b) there shall be delivered to the Securities
Registrar and the Regular Trustees such security or indemnity as may be required
by them to save each of them  harmless,  then in the absence of notice that such
Trust Securities  Certificate shall have been acquired by a bona fide purchaser,
the Regular  Trustees,  or any one of them, on behalf of the Trust shall execute
and make available for authentication  and delivery,  in exchange for or in lieu
of any such mutilated, destroyed, lost or stolen Trust Securities Certificate, a
new Trust Securities  Certificate of like  denomination.  In connection with the
issuance  of any new  Trust  Securities  Certificate  under  this  Section,  the
Securities  Registrar  may require the payment of a sum  sufficient to cover any
tax or other  governmental  charge that may be imposed in connection  therewith.
Any duplicative  Trust  Securities  Certificate  issued pursuant to this Section
shall constitute  conclusive evidence of an undivided beneficial interest in the
assets of the Trust, as if originally issued, whether or not the lost, stolen or
destroyed Trust Securities Certificate shall be found at any time.

         SECTION  5.6  Persons  Deemed  Securityholders.  Each  Trustee  and the
Securities  Registrar shall treat the Person in whose name any Trust  Securities
Certificate shall be registered in the Securities  Register as the owner of such
Trust Securities Certificate for the purpose of receiving  Distributions and for
all other  purposes  whatsoever,  and none of the  Trustees  nor the  Securities
Registrar shall be bound by any notice to the contrary.

                                       24
<PAGE>

         SECTION 5.7 Access to List of Securityholders' Names and Addresses. The
Regular  Trustees or the Sponsor shall furnish or cause to be furnished  (unless
the Property Trustee is acting as Securities Registrar with respect to the Trust
Securities  under  the Trust  Agreement)  a list,  in such form as the  Property
Trustee  may   reasonably   require,   of  the  names  and   addresses   of  the
Securityholders  as of the most recent record date (a) to the Property  Trustee,
quarterly at least five Business Days before each Distribution  Date, and (b) to
the Property Trustee, promptly after receipt by the Sponsor of a written request
therefor  from the Property  Trustee in order to enable the Property  Trustee to
discharge its obligations under this Trust Agreement, in each case to the extent
such  information is in the possession or control of the Regular Trustees or the
Sponsor and is not identical to a previously  supplied list or has not otherwise
been received by the Property  Trustee in its capacity as Securities  Registrar.
The rights of  Securityholders  to communicate with other  Securityholders  with
respect  to  their  rights  under  this  Trust  Agreement  or  under  the  Trust
Securities,  and the corresponding rights of the Trustee shall be as provided in
the  Trust  Indenture  Act.  Each  Holder,  by  receiving  and  holding  a Trust
Securities  Certificate,  and each Owner  shall be deemed to have  agreed not to
hold the Sponsor,  the Property Trustee or the Regular  Trustees  accountable by
reason of the disclosure of its name and address,  regardless of the source from
which such information was derived.

         SECTION 5.8 Maintenance of Office or Agency.  The Securities  Registrar
shall  maintain  in The City of New York an  office  or  offices  or  agency  or
agencies  where  Preferred  Securities   Certificates  may  be  surrendered  for
registration  of transfer,  exchange or conversion and where notices and demands
to or upon the Trustees in respect of the Trust  Securities  Certificates may be
served.  The Securities  Registrar  initially  designates  State Street Bank and
Trust  Company,  N.A.,  61  Broadway,  15th  Floor,  New York,  New York  10006,
Attention:  Corporate Trust Department,  as its principal corporate trust office
for such purposes.  The Securities Registrar shall give prompt written notice to
the  Sponsor  and to the  Securityholders  of any change in the  location of the
Securities Register or any such office or agency.

         SECTION  5.9  Appointment  of  Paying  Agent.  In the  event  that  the
Preferred  Securities are not in book-entry  form only, the Trust shall maintain
in the Borough of Manhattan,  City of New York, an office or agency (the "Paying
Agent") where the Preferred  Securities may be presented for payment. The Paying
Agent shall make Distributions to  Securityholders  from the Payment Account and
shall report the amounts of such  Distributions  to the Property Trustee and the
Regular  Trustees.  Any Paying Agent shall have the revocable  power to withdraw
funds from the  Payment  Account  for the  purpose  of making the  Distributions
referred  to above.  The Regular  Trustees  may revoke such power and remove the
Paying Agent if such Trustees determine in their sole discretion that the Paying
Agent shall have failed to perform its obligations under this Trust Agreement in
any material respect.  The Paying Agent shall initially be the Property Trustee,
and any  co-paying  agent chosen by the Property  Trustee and  acceptable to the
Regular  Trustees  and the Sponsor.  Any Person  acting as Paying Agent shall be
permitted to resign as Paying Agent upon 30 days' written notice to the Property
Trustee and the Sponsor;  provided,  however,  that no such  resignation  of the
Paying  Agent  shall  be  effective  until a  successor  Paying  Agent  has been
appointed  and has accepted  such  appointment  by  instrument  executed by such
successor Paying Agent and delivered to the Trust, the Sponsor and the resigning
Paying  Agent.  In the event that the  Property  Trustee  shall no longer be the
Paying Agent or a successor Paying Agent shall resign or its authority to act be
revoked,  the Regular  Trustees  shall appoint a successor that is acceptable to
the  Property  Trustee and the Sponsor to act as Paying  Agent

                                       25
<PAGE>

(which shall be a bank or trust  company).  Each  successor  Paying Agent or any
additional  Paying Agent shall agree with the Trustees  that,  as Paying  Agent,
such  successor  Paying Agent or additional  Paying Agent will hold all sums, if
any, held by it for payment to the  Securityholders  in trust for the benefit of
the  Securityholders  entitled  thereto  until  such sums  shall be paid to each
Securityholder.  The  Paying  Agent  shall  return  all  unclaimed  funds to the
Property Trustee and upon removal of a Paying Agent such Paying Agent shall also
return all funds in its  possession to the Property  Trustee.  The provisions of
Sections  8.1, 8.3 and 8.6 shall apply to the Property  Trustee also in its role
as Paying Agent,  for so long as the Property  Trustee shall act as Paying Agent
and, to the extent  applicable,  to any other paying agent appointed  hereunder.
Any reference in this  Agreement to the Paying Agent shall include any co-paying
agent unless the context requires otherwise.

         SECTION  5.10  Ownership  of Common  Securities  by  Sponsor.  Upon the
issuance of Common  Securities as provided for in Section 2.5, the Sponsor shall
acquire beneficial and record ownership of the Common Securities. The Parent has
covenanted in the Guarantee to maintain directly or indirectly 100% ownership of
the Common  Securities;  provided  that any  successor  of the Parent  under the
Indenture may succeed to the Parent's ownership of the Common Securities. To the
fullest extent permitted by law, any attempted transfer of the Common Securities
in violation of that covenant  shall be void.  The Regular  Trustees shall cause
each  Common  Securities   Certificate  to  contain  a  legend  stating,   "THIS
CERTIFICATE  IS NOT  TRANSFERABLE  EXCEPT  TO AN ENTITY  WHOLLY  OWNED BY SENIOR
HOUSING  PROPERTIES TRUST OR TO CERTAIN  SUCCESSORS OF SENIOR HOUSING PROPERTIES
TRUST."

         SECTION  5.11  Global   Securities;   Non-Global   Securities;   Common
Securities Certificate.

              (a)  Each  Global  Certificate   authenticated  under  this  Trust
Agreement shall be registered in the name of the Clearing  Agency  designated by
the Sponsor for such Global  Certificate  or a nominee  thereof and delivered to
such Clearing Agency or a nominee thereof or custodian  therefor,  and each such
Global  Certificate  shall  constitute a Preferred  Security for all purposes of
this Trust Agreement.

              (b) If a Global  Certificate  is to be  exchanged  for  Definitive
Preferred Securities  Certificates or canceled in whole, it shall be surrendered
by or on behalf of the Clearing Agency, its nominee or custodian to the Property
Trustee,  as Securities  Registrar,  for exchange or cancellation as provided in
this  Article 5. If any Global  Certificate  is to be exchanged  for  Definitive
Preferred Securities  Certificates or cancelled in part, or if another Preferred
Security is to be exchanged in whole or in part for a beneficial interest in any
Global  Certificate,  in each case,  as provided in Section 5.4, then either (i)
such Global  Certificate shall be so surrendered for exchange or cancellation as
provided in this Article 5 or (ii) the Liquidation  Amount thereof (or number of
Preferred  Securities  represented  thereby) shall be reduced or increased by an
amount equal to the portion,  thereof to be so exchanged or cancelled,  or equal
to the  Liquidation  Amount of (or  number of  securities  represented  by) such
Definitive  Preferred Security  Certificates to be so exchanged for a beneficial
interest therein, as the case may be, by means of an appropriate adjustment made
on the records of the Property Trustee, as Securities  Registrar,  whereupon the
Property Trustee, in accordance with the Applicable  Procedures,  shall

                                       26
<PAGE>

instruct  the  Clearing  Agency  or  its  authorized  representative  to  make a
corresponding  adjustment to its records.  Upon any such surrender or adjustment
of a Global Certificate,  a Regular Trustee shall execute on behalf of the Trust
by manual or facsimile  signature,  and the Property  Trustee shall,  subject to
Section  5.4 and as  otherwise  provided  in this  Article 5,  authenticate  and
deliver  any  Preferred   Securities   issuable  in  exchange  for  such  Global
Certificate  (or any  portion  thereof)  to or upon the  written  order of,  and
registered  in such  names as may be  directed  by, the  Clearing  Agency or its
authorized  representative.   Upon  the  request  of  the  Property  Trustee  in
connection with the occurrence of any of the events specified in this paragraph,
the Sponsor shall promptly make  available to the Property  Trustee a reasonable
supply of Preferred  Securities that are not in the form of Global Certificates.
The  Property  Trustee  shall be entitled to  conclusively  rely upon any order,
direction or request of the  Clearing  Agency or its  authorized  representative
which is given or made  pursuant to this  Article 5 if such order,  direction or
request is given or made in accordance with the Applicable Procedures.

              (c) Every  Preferred  Security  authenticated  and delivered  upon
registration  of  transfer  of,  or in  exchange  for or in lieu  of,  a  Global
Certificate  or any  portion  thereof,  whether  pursuant  to this  Article 5 or
otherwise,  shall be authenticated and delivered in the form of, and shall be, a
Global Certificate,  unless such Preferred Security is registered in the name of
a Person other than the Clearing Agency for such Global Certificate or a nominee
thereof.

              (d) The Clearing Agency or its nominee,  as registered  owner of a
Global  Certificate,  shall be the  Holder of such  Global  Certificate  for all
purposes under this Trust Agreement and the Preferred Securities,  and owners of
beneficial  interests in a Global Certificate shall hold such interests pursuant
to the Applicable Procedures.  Accordingly, any such Owner's beneficial interest
in a Global Certificate will be shown only on, and the transfer of such interest
shall be effected only through, records maintained by the Clearing Agency or its
nominee or its participants and such owners of beneficial  interests in a Global
Certificate  will  not be  considered  the  owners  or  Holders  of such  Global
Certificate for any purpose of this Trust Agreement or the Preferred Securities.

              (e) A single Common Securities Certificate representing the Common
Securities  shall initially be issued to the Sponsor in the form of a definitive
Common Securities Certificate.

         SECTION 5.12 Notices to Clearing Agency. To the extent that a notice or
other communication to the Owners is required under this Trust Agreement, unless
and until Definitive Preferred Securities Certificates shall have been issued to
Owners  pursuant to Section 5.13,  the Trustees  shall give all such notices and
communications  specified  herein to be given to Owners to the Clearing  Agency,
and shall have no obligations to provide notices directly to the Owners.

         SECTION   5.13   Definitive    Preferred    Securities    Certificates.
Notwithstanding  any  other  provision  in  this  Trust  Agreement,   no  Global
Certificate  may be  exchanged  in  whole or in part  for  Preferred  Securities
registered,  and no transfer of a Global  Certificate in whole or in part may be
registered,  in the name of any Person other than the  Clearing  Agency for such
Global  Certificate or a nominee thereof unless (i) such Clearing Agency (A) has
notified the Trust and the Sponsor that it is unwilling or unable to continue as
Clearing  Agency for such Global  Certificate or (B) has ceased to be a clearing
agency registered as such under the Securities Exchange Act of 1934, as amended,
and in  either  case the  Trust  and the  Sponsor  thereupon  fail

                                       27
<PAGE>

to appoint a successor Clearing Agency, (ii) the Trust and the Sponsor, at their
option,  notify the  Property  Trustee  in  writing  that it elects to cause the
issuance of the Preferred  Securities in certificated  form or (iii) there shall
have  occurred  and be  continuing  an Event of Default or any event which after
notice  or lapse of time or both  would be an Event of  Default.  In all  cases,
Definitive  Preferred  Securities  Certificates  delivered  in exchange  for any
Global  Certificate  or beneficial  interests  therein will be registered in the
names,  and issued in any approved  denominations,  requested by or on behalf of
the Clearing Agency (in accordance with its customary procedures).

         SECTION  5.14 Rights of  Securityholders.  The legal title to the Trust
Property is vested exclusively in the Property Trustee (in its capacity as such)
in accordance with Section 2.9, and the Securityholders shall not have any right
or title therein other than the undivided  beneficial  interest in the assets of
the Trust  conferred by their Trust  Securities  and they shall have no right to
call for any  partition or division of property,  profits or rights of the Trust
except as  described  below.  The Trust  Securities  shall be personal  property
giving  only  the  rights  specifically  set  forth  therein  and in this  Trust
Agreement.  The Trust Securities shall have no preemptive or similar rights and,
when issued and  delivered to  Securityholders  against  payment of the purchase
price  therefor,  will be fully  paid  and  nonassessable  undivided  beneficial
interests in the assets of the Trust.  The Holders of the Trust  Securities,  in
their  capacities as such,  shall be entitled to the same limitation of personal
liability extended to stockholders of private  corporations for profit organized
under Title 2 of the Maryland General  Corporation Law; provided,  however,  the
Holders of Trust  Securities  may be  obligated,  pursuant  to the terms of this
Trust Agreement, to (i) provide indemnity and/or security in connection with and
pay taxes or governmental charges arising from transfers of Trust Securities and
(ii)  provide  security  and  indemnity  in  connection  with the requests of or
directions  to the Property  Trustee to exercise its rights and powers under the
Trust Agreement.

                                   ARTICLE 6
                    ACT OF SECURITYHOLDERS; MEETINGS; VOTING

         SECTION 6.1 Limitations on Voting Rights.

              (a) Except as  provided in this  Section,  in Section 8.2 and 10.2
and in the  Indenture  and as otherwise  required by law, no Holder of Preferred
Securities shall have any right to vote or in any manner  otherwise  control the
administration,  operation and management of the Trust or the obligations of the
parties  hereto,  nor shall anything herein set forth, or contained in the terms
of the Trust  Securities  Certificates,  be  construed so as to  constitute  the
Securityholders from time to time as partners or members of an association.

              (b)  Subject to Section 8.2  hereof,  if an Event of Default  with
respect to the Preferred  Securities has occurred and been  subsequently  cured,
waived or otherwise  eliminated,  the  provisions of Section  6.1(b)(ii)  hereof
shall apply.  During (x) the period  commencing on the date of the occurrence of
an Event of Default with respect to the Preferred  Securities  and ending on the
date when such Event of Default is cured, waived or otherwise eliminated, or (y)
any period not  described  in either the  preceding  sentence  or the  preceding
clause (x), the provisions of Section 6.1(b)(i) shall apply.

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<PAGE>

                  (i) The Holders of a majority in aggregate  Liquidation Amount
         of the  Preferred  Securities  will have the right to direct  the time,
         method and place of conducting any proceeding for any remedy  available
         to the  Property  Trustee or to exercise  any trust or power  conferred
         upon the Property  Trustee  under this Trust  Agreement,  including the
         right to direct the Property Trustee to exercise the remedies available
         to it as a holder of the Debt  Securities  but  excluding  the right to
         direct the Property Trustee to consent to an amendment, modification or
         termination  of the Indenture  (which shall be as provided  below).  So
         long as any Debt  Securities  are  held by the  Property  Trustee,  the
         Trustees shall not (A) direct the time,  method and place of conducting
         any proceeding for any remedy  available to the Indenture  Trustee,  or
         executing any trust or power  conferred on the  Indenture  Trustee with
         respect to such Debt  Securities,  (B) waive any past default  which is
         waivable under Section 513 of the Indenture,  (C) exercise any right to
         rescind  or  annul a  declaration  that the  principal  of all the Debt
         Securities  shall be due and payable or (D)  consent to any  amendment,
         modification  or termination  of the Indenture or the Debt  Securities,
         where such consent shall be required,  without, in each case, obtaining
         the  prior   approval  of  the  Holders  of  a  majority  in  aggregate
         Liquidation Amount of all Outstanding  Preferred  Securities (except in
         the case of clause (D),  which  consent,  in the event that no Event of
         Default  shall  occur and be  continuing,  shall be of the Holders of a
         majority  in  aggregate  Liquidation  Amount of all  Trust  Securities,
         voting  together as a single class);  provided,  however,  that where a
         consent under the Indenture would require the consent of each holder of
         Debt Securities affected thereby, no such consent shall be given by the
         Property  Trustee  without the prior written  consent of each Holder of
         Preferred  Securities.   The  Trustees  shall  not  revoke  any  action
         previously  authorized  or  approved  by a vote of the  Holders  of the
         Preferred Securities, except by a subsequent vote of the Holders of the
         Preferred Securities.  The Property Trustee shall notify all Holders of
         record of the Preferred  Securities  of any notice of default  received
         from the  Indenture  Trustee  with respect to the Debt  Securities.  In
         addition to  obtaining  the  foregoing  approvals of the Holders of the
         Preferred Securities, prior to taking any of the foregoing actions, the
         Trustees  shall,  at the expense of the  Sponsor,  obtain an Opinion of
         Counsel  experienced  in such matters to the effect that the Trust will
         not  be  classified  as an  association  taxable  as a  corporation  or
         partnership for United States federal income tax purposes on account of
         such action.

                  (ii) Subject to Section 8.2 of this Trust  Agreement  and only
         after the Event of Default with respect to the Preferred Securities has
         been cured, waived, or otherwise eliminated,  the Holders of a majority
         in aggregate  Liquidation Amount of the Common Securities will have the
         right to direct the time, method and place of conducting any proceeding
         for any remedy  available  to the  Property  Trustee or to exercise any
         trust or power  conferred  upon the Property  Trustee  under this Trust
         Agreement,  including  the  right to direct  the  Property  Trustee  to
         exercise  the  remedies  available  to  it  as a  holder  of  the  Debt
         Securities  but excluding  the right to direct the Property  Trustee to
         consent to an amendment,  modification  or termination of the Indenture
         (which shall be as provided below).  So long as any Debt Securities are
         held by the Property  Trustee,  the  Trustees  shall not (A) direct the
         time,  method and place of  conducting  any  proceeding  for any remedy
         available to the  Indenture  Trustee,  or executing  any trust or power
         conferred  on  the   Indenture   Trustee  with  respect  to  such  Debt
         Securities,  (B) waive any past default which is waivable under Section
         513 of the  Indenture,  (C)  exercise  any right to  rescind or

                                       29
<PAGE>

         annul a declaration that the principal of all the Debt Securities shall
         be due and payable or (D)  consent to any  amendment,  modification  or
         termination of the Indenture or the Debt Securities, where such consent
         shall be required,  without, in each case, obtaining the prior approval
         of the Holders of a majority  in  aggregate  Liquidation  Amount of all
         Common Securities (except in the case of clause (D), which consent,  in
         the event that no Event of Default shall occur and be continuing, shall
         be of the Holders of a majority in aggregate  Liquidation Amount of all
         Trust  Securities,  voting  together  as  a  single  class);  provided,
         however,  that where a consent  under the  Indenture  would require the
         consent of each holder of Debt  Securities  affected  thereby,  no such
         consent  shall be given  by the  Property  Trustee  without  the  prior
         written consent of each Holder of Common Securities. The Trustees shall
         not revoke any action  previously  authorized  or approved by a vote of
         the Holders of the Common  Securities,  except by a subsequent  vote of
         the Holders of the Common Securities. The Property Trustee shall notify
         all Holders of record of the Common Securities of any notice of default
         received  from  the   Indenture   Trustee  with  respect  to  the  Debt
         Securities.  In addition to obtaining  the  foregoing  approvals of the
         Holders of the Common Securities,  prior to taking any of the foregoing
         actions,  the Trustees shall, at the expense of the Sponsor,  obtain an
         Opinion of Counsel  experienced  in such matters to the effect that the
         Trust will not be classified as an association taxable as a corporation
         or partnership for United States federal income tax purposes on account
         of such action.

                  (iii) The provisions of this Section 6.1(b) and Section 6.1(a)
         of this Trust Agreement shall be in lieu of Section 316(a)(1)(A) of the
         Trust Indenture Act, and such Section  316(a)(1)(A) is hereby expressly
         excluded from this Trust  Agreement and the  Preferred  Securities,  as
         permitted by the Trust Indenture Act.

              (c) If any  proposed  amendment to this Trust  Agreement  provides
for, or the Trustees otherwise propose to effect, the dissolution, winding-up or
termination  of the  Trust,  other  than  pursuant  to the  terms of this  Trust
Agreement,  then the Holders of Outstanding Preferred Securities as a class will
be entitled to vote on such amendment or proposal and such amendment or proposal
shall not be effective  except with the approval of the Holders of a majority in
aggregate Liquidation Amount of the Outstanding Preferred Securities.

         SECTION 6.2 Notice of  Meetings.  Notice of all meetings of the Holders
of the Preferred Securities, stating the time, place and purpose of the meeting,
shall  be  given  by the  Property  Trustee  pursuant  to  Section  10.8 to each
Preferred  Securityholder of record, at its registered address, at least 15 days
and not more than 90 days before the meeting. At any such meeting,  any business
properly  before the meeting may be so  considered  whether or not stated in the
notice of the meeting.  Any adjourned  meeting may be held as adjourned  without
further notice.

         SECTION 6.3 Meetings of Preferred Securityholders. No annual meeting of
Securityholders  is required to be held. The Regular  Trustees,  however,  shall
call a meeting of Securityholders to vote on any matter upon the written request
of the Preferred  Securityholders  of record of 25% of the Preferred  Securities
(based upon their Liquidation  Amount), and the Regular Trustees or the Property
Trustee may, at any time in their  discretion,  call a meeting of

                                       30
<PAGE>

the  Holders of  Preferred  Securities  to vote on any  matters as to which such
Holders are entitled to vote.

         Holders of record of a majority of the Preferred Securities (based upon
their  Liquidation  Amount),  present in person or by proxy,  shall constitute a
quorum at any meeting of Securityholders.

         If a quorum is present at a meeting, an affirmative vote by the Holders
of record of  Preferred  Securities  present,  in person or by proxy,  holding a
majority of the Preferred  Securities (based upon their Liquidation Amount) held
by Holders of record of  Preferred  Securities  present,  either in person or by
proxy,  at such  meeting  shall  constitute  the action of the  Securityholders,
unless this Trust Agreement requires a greater number of affirmative votes.

         SECTION  6.4 Voting  Rights.  Securityholders  shall be entitled to one
vote for each $25.00 of Liquidation Amount represented by their Trust Securities
in respect of any matter as to which such  Securityholders are entitled to vote.
Notwithstanding  that  Holders of Preferred  Securities  are entitled to vote or
consent under any of the  circumstances  described  above,  any of the Preferred
Securities  that are  owned at such time by the  Sponsor,  the  Trustees  or any
affiliate of any Trustee shall, for purposes of such vote or consent, be treated
as if such Preferred Securities were not outstanding.

         SECTION  6.5  Proxies,  Etc.  At any  meeting of  Securityholders,  any
Securityholders  entitled to vote  thereat may vote by proxy,  provided  that no
proxy  shall be voted at any  meeting  unless it shall have been  placed on file
with the Regular  Trustees,  or with such other officer or agent of the Trust as
the Regular  Trustees may direct,  for  verification  prior to the time at which
such vote shall be taken.  Pursuant to a  resolution  of the  Property  Trustee,
proxies  may be  solicited  in the name of the  Property  Trustee or one or more
officers  of the  Property  Trustee.  Only  Securityholders  of record  shall be
entitled to vote. When Trust Securities are held jointly by several Persons, any
one of them may vote at any meeting in person or represented by proxy in respect
of such Trust Securities,  but if more than one of them shall be present at such
meeting in person or by proxy, and such joint owners or their proxies so present
disagree  as to any vote to be cast,  such vote shall not be received in respect
of such Trust Securities. A proxy purporting to be executed by or on behalf of a
Securityholder  shall  be  deemed  valid  unless  challenged  at or prior to its
exercise, and the burden of proving invalidity shall rest on the challenger.  No
proxy shall be valid more than three years after its date of execution.

         SECTION 6.6 Securityholder  Action by Written Consent. Any action which
may be taken by  Securityholders  at a meeting may be taken without a meeting if
Securityholders  holding a majority of all Outstanding  Trust Securities  (based
upon their  Liquidation  Amount)  entitled to vote in respect of such action (or
such larger proportion  thereof as shall be required by any express provision of
this Trust Agreement) shall consent to the action in writing.

         SECTION 6.7 Record Date for Voting and Other Purposes. For the purposes
of determining the  Securityholders who are entitled to notice of and to vote at
any meeting or by written consent,  or to participate in any Distribution on the
Trust Securities in respect of which a record date is not otherwise provided for
in this Trust  Agreement,  or for the purpose of any other  action,  the Regular
Trustees  may from time to time fix a date,  not more than 90 days  prior to the
date of any meeting of  Securityholders or the payment of Distributions or other
action,  as the

                                       31
<PAGE>

case may be,  as a record  date for the  determination  of the  identity  of the
Securityholders of record for such purposes.

         SECTION   6.8   Acts   of   Securityholders.   Any   request,   demand,
authorization,  direction,  notice,  consent, waiver or other action provided or
permitted by this Trust Agreement to be given, made or taken by  Securityholders
or  Owners  may be  embodied  in and  evidenced  by one or more  instruments  of
substantially  similar tenor signed by such  Securityholders or Owners in person
or by an agent duly  appointed in writing;  and,  except as otherwise  expressly
provided  herein,  such action shall become  effective  when such  instrument or
instruments are delivered to a Regular  Trustee.  Such instrument or instruments
(and the action  embodied  therein and evidenced  thereby) are herein  sometimes
referred  to as  the  "Act"  of  the  Securityholders  or  Owners  signing  such
instrument  or  instruments.  Proof of execution of any such  instrument or of a
writing  appointing  any such agent shall be sufficient  for any purpose of this
Trust  Agreement  and  (subject  to  Section  8.1)  conclusive  in  favor of the
Trustees, if made in the manner provided in this Section.

         The fact and date of the execution by any Person of any such instrument
or writing may be proved by the affidavit of a witness of such execution or by a
certificate  of a notary  public  or  other  officer  authorized  by law to take
acknowledgments of deeds, certifying that the individual signing such instrument
or writing acknowledged to him the execution thereof. Where such execution is by
a  signer  acting  in a  capacity  other  than  his  individual  capacity,  such
certificate  or  affidavit  shall  also  constitute   sufficient  proof  of  his
authority. The fact and date of the execution of any such instrument or writing,
or the  authority of the Person  executing  the same,  may also be proved in any
other manner which any Trustee receiving the same deems sufficient.

         The ownership of Preferred Securities shall be proved by the Securities
Register.

         Any request, demand, authorization,  direction, notice, consent, waiver
or other Act of the Securityholder of any Trust Security shall bind every future
Securityholder of the same Trust Security and the  Securityholder of every Trust
Security  issued  upon the  registration  of  transfer  thereof  or in  exchange
therefor or in lieu thereof in respect of anything done,  omitted or suffered to
be done by the  Trustees  or the  Trust  in  reliance  thereon,  whether  or not
notation of such action is made upon such Trust Security.

         Without limiting the foregoing, a Securityholder  entitled hereunder to
take any action hereunder with regard to any particular Trust Security may do so
with regard to all or any part of the Liquidation  Amount of such Trust Security
or by one or more duly appointed agents each of which may do so pursuant to such
appointment with regard to all or any part of such Liquidation Amount.

         If any dispute shall arise between the  Securityholders and the Regular
Trustees or among such  Securityholders  or Regular Trustees with respect to the
authenticity,  validity or binding nature of any request, demand, authorization,
direction,  consent, waiver or other Act of such Securityholder or Trustee under
this Article 6, then the  determination  of such matter by the Property  Trustee
shall be conclusive with respect to such matter.

         Upon the  occurrence  and  continuation  of an Event  of  Default,  the
Holders of Preferred  Securities  shall rely on the  enforcement by the Property
Trustee of its rights as holder of the Debt

                                       32
<PAGE>

Securities  against the Parent.  If the  Property  Trustee  fails to enforce its
rights as holder of the Debt Securities  after a request therefor by a Holder of
Preferred  Securities,  such holder may proceed to enforce such rights  directly
against the Sponsor.  Notwithstanding the foregoing,  if an Event of Default has
occurred and is continuing and such event is  attributable to the failure of the
Parent to pay  interest or  principal  on the Debt  Securities  on the date such
interest or principal is otherwise payable (or in the case of redemption, on the
Redemption Date), then a Holder of Preferred  Securities shall have the right to
institute a proceeding  directly against the Parent,  for enforcement of payment
to such holder of the principal amount of or interest on Debt Securities  having
a principal  amount equal to the aggregate  Liquidation  Amount of the Preferred
Securities of such Holder after the  respective  due date  specified in the Debt
Securities (a "Direct Action").  In connection with any such Direct Action,  the
rights of the  Parent  will be  subrogated  to the  rights of any  Holder of the
Preferred  Securities  to the extent of any  payment  made by the Parent to such
Holder of Preferred Securities as a result of such Direct Action.

         SECTION 6.9 Inspection of Records. Upon reasonable demand and notice to
the Regular Trustees and the Property Trustee, any Securityholder shall have the
right,  at its expense,  to inspect  during usual  business  hours the following
records  of  the  Trust,   solely  for  purposes   reasonably  related  to  such
Securityholder's interest as a holder of Trust Securities:

              (a) a copy of this Trust Agreement and the Certificate of Trust of
the Trust and all amendments thereto, together with copies of any written powers
of attorney under which this Trust  Agreement,  such Certificate of Trust or any
such amendment have been executed;

              (b) if  and  to  the  extent  disclosure  thereof  is at the  time
required under the provisions of the Maryland Business Trust Act, a current list
of the name and last known business or mailing  address of each  Securityholder;
and

              (c) the separate annual financial statements of the Trust, if such
financial statements are prepared.

Any such  demand and notice  shall be in writing  and shall state the purpose of
the demand.

                                   ARTICLE 7
                         REPRESENTATIONS AND WARRANTIES

         SECTION 7.1 Representations and Warranties of the Property Trustee. The
Property  Trustee hereby  represents and warrants for the benefit of the Sponsor
and the Securityholders that:

              (a) the  Property  Trustee  is a  trust  company  duly  organized,
validly  existing and in good  standing  under the laws of the  Commonwealth  of
Massachusetts;

              (b) the Property Trustee has full corporate  power,  authority and
legal right to execute,  deliver  and perform its  obligations  under this Trust
Agreement  and has  taken  all  necessary  action to  authorize  the  execution,
delivery and performance by it of this Trust Agreement;

                                       33
<PAGE>

              (c) this Trust  Agreement has been duly  authorized,  executed and
delivered by the Property  Trustee and constitutes the valid and legally binding
agreement of the Property Trustee  enforceable against it in accordance with its
terms, subject to bankruptcy,  insolvency, fraudulent transfer,  reorganization,
moratorium  and similar laws of general  applicability  relating to or affecting
creditors' rights and to general equity principles; and

              (d)  the  execution,  delivery  and  performance  by the  Property
Trustee of this  Trust  Agreement  have been duly  authorized  by all  necessary
corporate or other action on the part of the Property Trustee and do not require
any  approval  of  stockholders  of the  Property  Trustee  and such  execution,
delivery  and  performance  will not violate the Property  Trustee's  charter or
by-laws or (b) violate any law,  governmental  rule or  regulation of the United
States or the Commonwealth of  Massachusetts,  as the case may be, governing the
banking,  corporate,  or trust  powers of the  Property  Trustee,  or any order,
judgment or decree applicable to the Property Trustee.

         SECTION 7.2  Representations  and  Warranties  of Sponsor.  The Sponsor
hereby  represents and warrants for the benefit of the Property  Trustee and the
Securityholders that:

              (a) the Trust Securities  Certificates  issued on the Closing Date
on  behalf of the Trust  have been duly  authorized  and will have been duly and
validly executed, issued and delivered by the Trustees pursuant to the terms and
provisions of, and in accordance with the  requirements of, this Trust Agreement
and the  Securityholders  will be, as of such date,  entitled to the benefits of
this Trust Agreement; and

              (b) there are no taxes, fees or other governmental charges payable
by the Trust (or the  Trustees  on  behalf of the  Trust)  under the laws of the
State of Maryland or any political  subdivision  thereof in connection  with the
execution,  delivery  and  performance  by the  Property  Trustee  of this Trust
Agreement.

                                    ARTICLE 8
                                  THE TRUSTEES

         SECTION 8.1 Certain Duties and Responsibilities.

              (a) The duties and  responsibilities  of the Trustees  shall be as
provided by this Trust  Agreement and, in the case of the Property  Trustee,  by
the Trust  Indenture  Act. The Property  Trustee,  before the  occurrence of any
Event of Default  and after the curing or waiving of all Events of Default  that
may have occurred,  shall  undertake to perform only such duties and obligations
as are  specifically  set forth in this Trust  Agreement and the Trust Indenture
Act and no implied covenants shall be read into this Trust Agreement against the
Property  Trustee.  In case an Event of Default has occurred  (that has not been
cured or waived  pursuant to Section 8.2) of which a Responsible  Officer of the
Property Trustee has actual knowledge,  the Property Trustee shall exercise such
rights and powers vested in it by this Trust  Agreement and the Trust  Indenture
Act,  and use the same  degree of care and skill in its  exercise,  as a prudent
individual  would exercise or use under the  circumstances in the conduct of his
or her own affairs.

                                       34
<PAGE>

         Notwithstanding  the  foregoing,  no provision of this Trust  Agreement
shall require the Trustees to expend or risk their own funds or otherwise  incur
any financial liability in the performance of any of their duties hereunder,  or
in the exercise of any of their rights or powers,  if they shall have reasonable
grounds for believing that repayment of such funds or adequate indemnity against
such risk or liability is not  reasonably  assured to it. Whether or not therein
expressly so provided,  every provision of this Trust Agreement  relating to the
conduct or affecting  the  liability of or affording  protection to the Trustees
shall be  subject  to the  provisions  of this  Section.  Nothing  in this Trust
Agreement shall be construed to release the Regular  Trustees from liability for
their own grossly negligent action,  their own grossly negligent failure to act,
or their own willful misconduct.

         To the extent that, at law or in equity,  a Regular  Trustee has duties
(including fiduciary duties) and liabilities relating thereto to the Trust or to
the Securityholders, such Regular Trustee shall not be liable to the Trust or to
any  Securityholder  to the maximum extent that Maryland law in effect from time
to time  permits  limitation  of the  liability  of trustees  and  officers of a
business trust. The provisions of this Trust Agreement,  to the extent that they
restrict the duties and liabilities of the Regular Trustees  otherwise  existing
at law or in  equity,  are  agreed by the  Sponsor  and the  Securityholders  to
replace such other duties and liabilities of the Regular Trustees.

              (b) All payments made by the Property Trustee or a Paying Agent in
respect of the Trust Securities shall be made only from the revenue and proceeds
from the Trust  Property  and only to the extent that there shall be  sufficient
revenue or proceeds from the Trust Property to enable the Property  Trustee or a
Paying  Agent to make  payments  in  accordance  with  the  terms  hereof.  Each
Securityholder,  by its acceptance of a Trust Security, agrees that it will look
solely to the revenue and proceeds from the Trust Property to the extent legally
available for  distribution  to it as herein  provided and that the Trustees are
not personally liable to it for any amount distributable in respect of any Trust
Security  or for any other  liability  in  respect of any Trust  Security.  This
Section 8.1(b) does not limit the liability of the Trustees  expressly set forth
elsewhere in this Trust  Agreement or, in the case of the Property  Trustee,  in
the Trust Indenture Act.

              (c) No  provision  of this Trust  Agreement  shall be construed to
relieve the Property  Trustee from liability for its own negligent  action,  its
own negligent failure to act, or its own willful misconduct, except that:

                  (i) the Property  Trustee shall not be liable for any error of
         judgment  made in good faith by an  authorized  officer of the Property
         Trustee,  unless  it shall be  proved  that the  Property  Trustee  was
         negligent in ascertaining the pertinent facts;

                  (ii) the Property  Trustee shall not be liable with respect to
         any  action  taken  or  omitted  to be  taken  by it in good  faith  in
         accordance with the direction of the Holders of a majority in aggregate
         Liquidation Amount of the Trust Securities relating to the time, method
         and place of conducting any proceeding for any remedy  available to the
         Property  Trustee,  or exercising any trust or power conferred upon the
         Property Trustee under this Trust Agreement;

                                       35
<PAGE>

                  (iii) the  Property  Trustee's  sole duty with  respect to the
         custody,  safekeeping and physical  preservation of the Debt Securities
         and  the  Payment  Account  shall  be to deal  with  such  property  as
         fiduciary  assets,  subject  to  the  protections  and  limitations  on
         liability  afforded to the Property  Trustee under this Trust Agreement
         and the Trust Indenture Act;

                  (iv) the Property Trustee shall not be liable for any interest
         on any  money  received  by it  except as it may  otherwise  agree,  in
         writing,  with the Sponsor and money held by the Property  Trustee need
         not be segregated from other funds held by it except in relation to the
         Payment Account  maintained by the Property Trustee pursuant to Section
         3.1 and except to the extent otherwise required by law;

                  (v)  the  Property   Trustee  shall  not  be  responsible  for
         monitoring the  compliance by the Regular  Trustees or the Sponsor with
         their  respective  duties  under  this Trust  Agreement,  nor shall the
         Property Trustee be liable for the default or misconduct of the Regular
         Trustees or the Sponsor;

                  (vi) the Property Trustee shall have no duty or liability with
         respect to the value, genuineness, existence or sufficiency of the Debt
         Securities  or the  payment of any taxes or  assessments  thereon or in
         connection therewith;

                  (vii) the duties and obligations of the Property Trustee shall
         be determined solely by the express  provisions of this Trust Agreement
         and in the  Preferred  Securities  and the  Common  Securities  and the
         Property Trustee shall not be liable except for the performance of such
         duties  and  obligations  as are  specifically  set forth in this Trust
         Agreement and in the Preferred  Securities  and the Common  Securities,
         and no implied  covenants or obligations  shall be read into this Trust
         Agreement against the Property Trustee; and

                  (viii) no provision of this Trust  Agreement shall require the
         Property  Trustee  to expend or risk its own funds or  otherwise  incur
         personal financial liability in the performance of any of its duties or
         in the  exercise  of any of its  rights  or  powers,  if it shall  have
         reasonable  grounds for  believing  that the repayment of such funds or
         liability is not reasonably assured to it under the terms of this Trust
         Agreement or indemnity reasonably  satisfactory to the Property Trustee
         against such risk or liability is not reasonably assured to it.

                                       36
<PAGE>

         SECTION 8.2 Notice of Defaults.

              (a) Within ten days after the  occurrence  of any Event of Default
actually known to a Responsible  Officer of the Property  Trustee,  the Property
Trustee  shall  transmit,  in the manner and to the extent  provided  in Section
10.8,  notice of such Event of Default to the Holders of  Preferred  Securities,
the Regular  Trustees and the Sponsor,  unless such Event of Default  shall have
been  cured or waived,  provided  that,  except for a default in the  payment of
principal of (or premium, if any) or interest on any of the Debt Securities, the
Property  Trustee shall be fully protected in withholding  such notice if and so
long as the Board of Trustees, the executive committee,  or a trust committee of
directors  and/or  Responsible  Officers of the  Property  Trustee in good faith
determines  that the  withholding  of such  notice  is in the  interests  of the
Holders of the Preferred Securities.

              (b) Within ten days  after the  receipt of notice of the  Parent's
exercise  of its  right to  extend  the  interest  payment  period  for the Debt
Securities  pursuant to the Indenture,  the Property Trustee shall transmit,  in
the manner and to the extent  provided in Section 10.8,  notice of such exercise
to the Securityholders, unless such exercise shall have been revoked.

              (c) The Holders of a majority in  Liquidation  Amount of Preferred
Securities  may,  by vote,  on behalf  of the  Holders  of all of the  Preferred
Securities,  waive  any past  Event  of  Default  in  respect  of the  Preferred
Securities and its  consequences,  provided  that, if the  underlying  Indenture
Event of Default:

                  (i) is not waivable under the Indenture,  the Event of Default
         under this Trust Agreement shall also not be waivable; or

                  (ii)  requires  the consent or vote of greater than a majority
         in principal  amount of the holders of the Debt  Securities,  including
         the consent or vote of all such  holders,  (a "Super  Majority")  to be
         waived  under the  Indenture,  the Event of  Default  under  this Trust
         Agreement  may only be  waived by the vote of the  Holders  of the same
         proportion in Liquidation  Amount of the Preferred  Securities that the
         relevant Super Majority represents of the aggregate principal amount of
         the Debt Securities outstanding.

         The  provisions of Section  6.1(b) and this Section  8.2(c) shall be in
lieu of  Section  316(a)(1)(B)  of the  Trust  Indenture  Act and  such  Section
316(a)(1)(B) of the Trust Indenture Act is hereby  expressly  excluded from this
Trust  Agreement  and  the  Preferred  Securities,  as  permitted  by the  Trust
Indenture Act. Upon such waiver,  any such default shall cease to exist, and any
Event of Default  with respect to the  Preferred  Securities  arising  therefrom
shall be deemed to have been cured,  for every purpose of this Trust  Agreement,
but no such waiver shall extend to any  subsequent  or other default or an Event
of  Default  with  respect  to the  Preferred  Securities  or  impair  any right
consequent thereon.  Any waiver by the Holders of the Preferred Securities of an
Event of Default with respect to the Preferred  Securities  shall also be deemed
to constitute a waiver by the Holders of the Common Securities of any such Event
of Default with respect to the Common  Securities for all purposes of this Trust
Agreement without any further act, vote, or consent of the Holders of the Common
Securities.

              (d) The Holders of a majority in Liquidation  Amount of the Common
Securities  may,  by  vote,  on  behalf  of the  Holders  of  all of the  Common
Securities,  waive  any

                                       37
<PAGE>

past  Event  of  Default  with  respect  to  the  Common   Securities   and  its
consequences, provided that, if the underlying Indenture Event of Default:

                  (i) is not  waivable  under the  Indenture,  except  where the
         Holders of the Common  Securities  are deemed to have waived such Event
         of Default under the Trust  Agreement as provided below in this Section
         8.2(d),  the Event of Default under this Trust Agreement shall also not
         be waivable; or

                  (ii)  requires  the consent or vote of a Super  Majority to be
         waived, except where the Holders of the Common Securities are deemed to
         have  waived  such Event of  Default  under  this  Trust  Agreement  as
         provided below in this Section 8.2(d),  the Event of Default under this
         Trust  Agreement  may only be waived by the vote of the  Holders of the
         same proportion in Liquidation Amount of the Common Securities that the
         relevant Super Majority represents of the aggregate principal amount of
         the Debt Securities outstanding;  provided further, that each Holder of
         Common  Securities  will be deemed  to have  waived  any such  Event of
         Default and all Events of Default with respect to the Common Securities
         and its  consequences  until all Events of Default  with respect to the
         Preferred  Securities have been cured, waived or otherwise  eliminated,
         and  until  such  Events  of  Default  have  been so  cured,  waived or
         otherwise eliminated,  the Property Trustee will be deemed to be acting
         solely on behalf of the Holders of the  Preferred  Securities  and only
         the Holders of the Preferred  Securities  will have the right to direct
         the Property  Trustee in accordance  with the terms of the  Securities.
         The  provisions of Section  6.1(b) and this Section  8.2(d) shall be in
         lieu of  Section  316(a)(1)(B)  of the  Trust  Indenture  Act and  such
         Section  316(a)(1)(B)  of the Trust  Indenture Act is hereby  expressly
         excluded from this Trust  Agreement and the  Preferred  Securities,  as
         permitted  by  the  Trust  Indenture  Act.  Subject  to  the  foregoing
         provisions of this Section 8.2(d),  upon such waiver,  any such default
         shall  cease to exist  and any Event of  Default  with  respect  to the
         Common Securities  arising therefrom shall be deemed to have been cured
         for every  purpose of this Trust  Agreement,  but no such waiver  shall
         extend to any  subsequent  or other  default or Event of  Default  with
         respect  to the  Common  Securities  or  impair  any  right  consequent
         thereon.

              (e) A waiver  of a  Indenture  Event of  Default  by the  Property
Trustee at the direction of the Holders of the Preferred Securities, constitutes
a waiver of the corresponding  Event of Default under this Trust Agreement.  The
foregoing  provisions  of this  Section  8.2(e)  shall  be in  lieu  of  Section
316(a)(1)(B)  of the Trust  Indenture Act and such Section  316(a)(1)(B)  of the
Trust Indenture Act is hereby  expressly  excluded from this Trust Agreement and
the Preferred Securities, as permitted by the Trust Indenture Act.

         SECTION  8.3  Certain  Rights  of  Property  Trustee.  Subject  to  the
provisions of Section 8.1:

              (a) the Property Trustee may conclusively  rely and shall be fully
protected in acting or refraining from acting in good faith upon any resolution,
Opinion  of  Counsel,  certificate,   written  representation  of  a  Holder  or
transferee  such as of a  certificate  presented for  transfer,  certificate  of
auditors  or any other  certificate,  statement,  instrument,  opinion,  report,
notice,  request,  consent,  order,  appraisal,  bond,  debenture,  note,  other
evidence of indebtedness

                                       38
<PAGE>

or other paper or document  believed by it to be genuine and to have been signed
or presented by the proper party or parties;

              (b) if no Event of Default has occurred and is continuing and, (i)
in  performing  its duties under this Trust  Agreement  the Property  Trustee is
required to decide between  alternative  courses of action or (ii) in construing
any of the  provisions in this Trust  Agreement  the Property  Trustee finds the
same ambiguous or inconsistent  with any other  provisions  contained  herein or
(iii) the Property Trustee is unsure of the application of any provision of this
Trust  Agreement,  then,  except as to any  matter as to which  the  Holders  of
Preferred  Securities  are  entitled  to vote  under  the  terms  of this  Trust
Agreement, the Property Trustee shall deliver a notice to the Sponsor requesting
written  instructions  of the Sponsor as to the course of action to be taken and
the Property Trustee shall take such action, or refrain from taking such action,
as the Property  Trustee  shall be  instructed in writing to take, or to refrain
from taking,  by the Sponsor;  provided,  however,  that if the Property Trustee
does not receive such instructions of the Sponsor within ten Business Days after
it has delivered  such notice,  or such  reasonably  shorter  period of time set
forth in such notice (which to the extent practicable shall not be less than two
Business  Days),  it may,  but shall be under no duty to,  take or refrain  from
taking such action not  inconsistent  with this Trust Agreement as it shall deem
advisable and in the best interests of the  Securityholders,  in which event the
Property  Trustee  shall  have no  liability  except  for  its  own  bad  faith,
negligence or willful misconduct;

              (c) any  direction  or act of the Sponsor or the Regular  Trustees
contemplated  by this Trust  Agreement  shall be  sufficiently  evidenced  by an
Officers' Certificate;

              (d) whenever in the  administration  of this Trust Agreement,  the
Property  Trustee shall deem it desirable  that a matter be  established  before
undertaking,  suffering or omitting any action  hereunder,  the Property Trustee
(unless other evidence is herein specifically prescribed) may, in the absence of
bad  faith  on its  part,  request  and  conclusively  rely  upon  an  Officers'
Certificate and an Opinion of Counsel which, upon receipt of such request, shall
be promptly delivered by the Sponsor or the Regular Trustees;

              (e) the  Property  Trustee  shall have no duty to  accomplish  any
recording,  filing or registration of any instrument (including any financing or
continuation  statement  or any  filing  under  tax or  securities  laws) or any
rerecording, refiling or reregistration thereof;

              (f) the Property Trustee may consult with counsel at the Sponsor's
expense (which  counsel may be counsel to the Sponsor or any of its  Affiliates,
and may  include  any of its  employees)  and the advice of such  counsel or any
Opinion of Counsel shall be full and complete  authorization  and  protection in
respect of any action  taken,  suffered or omitted by it hereunder in good faith
and in reliance  thereon and in  accordance  with such advice;  and the Property
Trustee  shall have the right at any time to seek  instructions  concerning  the
administration of this Trust Agreement from any court of competent jurisdiction;

              (g) the Property  Trustee shall be under no obligation to exercise
any of the rights or powers vested in it by this Trust  Agreement at the request
or direction  of any of the  Securityholders  pursuant to this Trust  Agreement,
unless  such  Securityholders   shall  have  offered  to  the  Property  Trustee
reasonable security or indemnity  satisfactory to it against the costs, expenses
(including  attorneys'  fees  and  expenses  and the  expenses  of the  Property
Trustee's

                                       39
<PAGE>

agents, custodians or nominees) and liabilities which might be incurred by it in
compliance with such request or direction;

              (h)  the  Property   Trustee  shall  not  be  bound  to  make  any
investigation into the facts or matters stated in any resolutions,  certificate,
statement,   instrument,  opinion,  report,  notice,  request,  consent,  order,
approval, bond, debenture, note or other evidence of indebtedness or other paper
or  document,  but the  Property  Trustee  may  make  such  further  inquiry  or
investigation into such facts or custodian or nominee matters as it may see fit;

              (i) the  Property  Trustee may execute any of the trusts or powers
hereunder or perform any duties  hereunder  either directly or by or through its
agents,  custodians or nominees,  attorneys or an  Affiliate,  provided that the
Property  Trustee shall not be responsible for the negligence or recklessness on
the part of any agent,  attorney,  custodian or nominee appointed by it with due
care hereunder;

              (j) whenever in the  administration  of this Trust  Agreement  the
Property Trustee shall deem it desirable to receive instructions with respect to
enforcing any remedy or right or taking any other action hereunder, the Property
Trustee (i) may request  instructions  from the Holders of the Trust Securities,
which  instructions  may only be given by the Holders of the same  proportion in
Liquidation  Amount of the Trust  Securities  as would be entitled to direct the
Property  Trustee  under the terms of the Trust  Securities  in  respect of such
remedy, right or action, (ii) may refrain from enforcing such remedy or right or
taking such other action until such  instructions are received,  and (iii) shall
be fully protected in conclusively  relying on or acting in accordance with such
instructions;

              (k)  except  as  otherwise   expressly   provided  by  this  Trust
Agreement,  the Property  Trustee shall not be under any  obligation to take any
action that is discretionary under the provisions of this Trust Agreement;

              (l) to the maximum extent that Maryland law in effect from time to
time  permits the  limitation  of the  liability  of trustees  and officers of a
business trust,  the Property  Trustee shall not be liable for any action taken,
suffered,  or omitted to be taken by it in connection with this Trust Agreement;
and

              (m) in the event that the  Property  Trustee  is also  acting as a
Paying Agent,  Exchange Agent and/or Securities Registrar hereunder,  the rights
and  protections  afforded to the  Property  Trustee  pursuant to this Article 8
shall also be afforded to such Paying Agent,  Exchange  Agent and/or  Securities
Registrar.

         No provision of this Trust Agreement shall be deemed to impose any duty
or obligation on the Property Trustee to perform any act or acts or exercise any
right, power, duty or obligation conferred or imposed on it, in any jurisdiction
in which it  shall  be  illegal,  or in  which  the  Property  Trustee  shall be
unqualified  or incompetent in accordance  with  applicable  law, to perform any
such act or acts, or to exercise any such right,  power, duty or obligation.  No
permissive  power  or  authority  available  to the  Property  Trustee  shall be
construed to be a duty.

         SECTION 8.4 Not Responsible for Recitals or Issuance of Securities. The
recitals contained herein and in the Trust Securities  Certificates shall not be
taken as the  statements  of

                                       40
<PAGE>

the  Trustees,  and the  Trustees  do not  assume any  responsibility  for their
correctness. The Trustees shall not be accountable for the use or application by
the Sponsor of the proceeds of the Debt Securities.

         SECTION 8.5 May Hold  Securities.  Except as provided in the definition
of the term  "Outstanding"  in Article 1, any  Trustee or any other agent of any
Trustee or the Trust,  in its individual or any other  capacity,  may become the
owner or pledgee of Trust  Securities and,  subject to Section 8.8 and 8.12, may
otherwise  deal with the Trust with the same rights it would have if it were not
a Trustee or such other agent.

         SECTION 8.6 Compensation; Indemnity; Fees.

         The Sponsor agrees:

              (a) to pay the Trustees from time to time reasonable  compensation
for all services  rendered by them hereunder  (which  compensation  shall not be
limited by any provision of law in regard to the compensation of a trustee of an
express trust);

              (b) except as otherwise  expressly  provided herein and subject to
the  applicable  limitations  set  forth  in  subsection  (c) or (d)  below,  to
reimburse each Trustee,  or advance  expenses to each Trustee,  upon request for
all reasonable  expenses,  disbursements  and advances  incurred or made by such
Trustee in accordance with any provision of this Trust Agreement  (including the
reasonable  compensation  and the expenses and  disbursements  of its agents and
counsel);

              (c)  to  the  fullest  extent  permitted  by  applicable  law,  to
indemnify and hold harmless (i) each Regular Trustee,  (ii) any Affiliate of any
Regular   Trustee,   (iii)  any  officer,   director,   shareholder,   employee,
representative  or agent of any Regular Trustee,  and (iv) any employee or agent
of the Trust or its  Affiliates  (referred to herein as an "Sponsor  Indemnified
Person") from and against any loss, damage,  liability, tax, penalty, expense or
claim of any kind or nature  whatsoever  incurred  by such  Sponsor  Indemnified
Person by reason of the creation,  operation,  dissolution or termination of the
Trust  or in  connection  with  the  administration  of the  Trust or any act or
omission  performed or omitted by such Sponsor  Indemnified  Person on behalf of
the Trust,  except that no Sponsor  Indemnified  Person  shall be entitled to be
indemnified  in respect of any loss,  damage or claim  incurred by such  Sponsor
Indemnified Person if it has been established that such expense, disbursement or
advance  is  attributable  to such  Sponsor  Indemnified  Person's  own  grossly
negligent action, grossly negligent failure to act, or willful misconduct;

              (d)  to  the  fullest  extent  permitted  by  applicable  law,  to
indemnify  and hold  harmless the Property  Trustee for, and to hold it harmless
against, any loss, liability or expense incurred without negligence or bad faith
on  its  part,   arising  out  of  or  in  connection  with  the  acceptance  or
administration  of the  trust or  trusts  hereunder,  including  the  costs  and
expenses of defending  itself against any claim or liability in connection  with
the exercise or performance of any of its powers or duties hereunder; and

              (e) no Trustee may claim any lien or charge on any Trust  Property
as a result of any amount due pursuant to this Section 8.6.

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<PAGE>

         SECTION 8.7 Property Trustee Required; Eligibility of Trustees.

              (a) There shall at all times be a Property Trustee  hereunder with
respect to the Trust Securities.  The Property Trustee shall be a Person that is
eligible  pursuant to the Trust  Indenture Act to act as such and has a combined
capital  and  surplus  of at least  $50,000,000.  If any such  Person  publishes
reports of condition at least annually,  pursuant to law or to the  requirements
of its  supervising  or  examining  authority,  then  for the  purposes  of this
Section,  the combined  capital and surplus of such Person shall be deemed to be
its  combined  capital  and  surplus as set forth in its most  recent  report of
condition so published.  If at any time the Property Trustee with respect to the
Trust Securities shall cease to be eligible in accordance with the provisions of
this  Section,  it shall  resign  immediately  in the manner and with the effect
hereinafter specified in this Article.

              (b)  There  shall  at all  times be one or more  Regular  Trustees
hereunder with respect to the Trust  Securities.  Each Regular  Trustee shall be
either a natural  person who is at least 21 years of age or a legal  entity that
shall act through one or more persons authorized to bind that entity.

         SECTION 8.8 Conflicting Interests. If the Property Trustee has or shall
acquire a conflicting  interest  within the meaning of the Trust  Indenture Act,
the Property  Trustee shall either  eliminate  such  interest or resign,  to the
extent and in the manner  provided  by, and  subject to the  provisions  of, the
Trust Indenture Act and this Trust Agreement.

         SECTION 8.9 Resignation and Removal; Appointment of Successor.

              (a) Subject to Sections 8.9(b),  Trustees (the "Relevant Trustee")
may be appointed or removed without cause at any time:

                  (i) until the  issuance  of any Trust  Securities,  by written
         instrument executed by the Sponsor; and

                  (ii)  after the  issuance  of any  Securities,  by vote of the
         Holders of a majority in  Liquidation  Amount of the Common  Securities
         voting as a class.

              (b) The Trustee that acts as Property Trustee shall not be removed
in   accordance   with  Section   8.9(a)  until  a  successor   possessing   the
qualifications  to act as a Property  Trustee  under  Section 8.7 (a  "Successor
Property  Trustee")  has been  appointed and has accepted  such  appointment  by
instrument  executed by such  Successor  Property  Trustee and  delivered to the
Trust, the Sponsor and the removed Property Trustee.

              (c) A Trustee appointed to office shall hold office until his, her
or its  successor  shall have been  appointed  or until  his,  her or its death,
removal,  resignation,  dissolution or liquidation.  Any Trustee may resign from
office  (without  need for prior or subsequent  accounting)  by an instrument in
writing signed by the Trustee and delivered to the Sponsor and the Trust,  which
resignation  shall take effect upon such  delivery or upon such later date as is
specified therein; provided, however, that:

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<PAGE>

                  (i) No  such  resignation  of the  Trustee  that  acts  as the
         Property Trustee shall be effective:

                           (A)  until a  Successor  Property  Trustee  has  been
                  appointed  and has accepted  such  appointment  by  instrument
                  executed by such Successor  Property  Trustee and delivered to
                  the Trust, the Sponsor and the resigning Property Trustee; or

                           (B)  until  the   assets  of  the  Trust   have  been
                  completely  liquidated and the proceeds thereof distributed to
                  the Holders of the Securities;

                  (ii) no appointment of a successor  Property  Trustee shall be
         effective  until  all  fees,  charges,  and  expenses  of the  retiring
         Property Trustee have been paid.

              (d) The  Holders  of the  Common  Securities  shall use their best
efforts to promptly appoint a Successor Property Trustee if the Property Trustee
delivers an instrument of resignation in accordance with Section 8.9(c).

              (e) If no Successor Property Trustee shall have been appointed and
accepted  appointment  as  provided  in this  Section  8.9  within 60 days after
delivery  pursuant  to this  Section  8.9 of an  instrument  of  resignation  or
removal,  the Property Trustee resigning or being removed may petition any court
of competent  jurisdiction for appointment of a Successor Property Trustee. Such
court may  thereupon,  after  prescribing  such  notice,  if any, as it may deem
proper and prescribe, appoint a Successor Property Trustee.

              (f) No Property  Trustee shall be liable for the acts or omissions
to act of any Successor Property Trustee.

              (g) The Property Trustee shall give notice of each resignation and
each  removal of a Trustee and each  appointment  of a successor  Trustee to all
Securityholders  in the manner provided in Section 10.8 and shall give notice to
the  Sponsor.  Each  notice  shall  include the name of the  successor  Relevant
Trustee  and the address of its  Corporate  Trust  Office if it is the  Property
Trustee.

              (h)  Notwithstanding  the foregoing or any other provision of this
Trust  Agreement,  in the event any Regular Trustee who is a natural person dies
or becomes,  in the opinion of the Sponsor,  incompetent or  incapacitated,  the
vacancy  created by such death,  incompetence or incapacity may be filled by (a)
the unanimous act of the remaining Regular Trustees if there are at least two of
them or (b)  otherwise by the Sponsor  (with the  successor in each case being a
Person who satisfies the eligibility  requirement for Regular Trustees set forth
in Section 8.7).

         The indemnity provided to a Trustee under Section 8.6 shall survive any
Trustee's resignation or removal or termination of this Trust Agreement.

         SECTION 8.10  Acceptance of  Appointment  by Successor.  In case of the
appointment  hereunder of a successor  Relevant  Trustee,  the retiring Relevant
Trustee  and each  successor  Relevant  Trustee  shall  execute  and  deliver an
amendment  hereto  wherein each  successor

                                       43
<PAGE>

Relevant  Trustee shall accept such appointment and which (a) shall contain such
provisions as shall be necessary or desirable to transfer and confirm to, and to
vest in, each  successor  Relevant  Trustee all the rights,  powers,  trusts and
duties of the  retiring  Relevant  Trustee and (b) shall add to or change any of
the  provisions of this Trust  Agreement as shall be necessary to provide for or
facilitate the  administration of the trusts hereunder by more than one Relevant
Trustee,  it being  understood  that nothing herein or in such  amendment  shall
constitute  such  Relevant  Trustees as  co-trustees  and upon the execution and
delivery of such amendment the  resignation or removal of the retiring  Relevant
Trustee  shall  become  effective to the extent  provided  therein and each such
successor Relevant Trustee,  without any further act, deed or conveyance,  shall
become  vested with all the rights,  powers,  trusts and duties of the  retiring
Relevant  Trustee;  but,  on  request  of the  Trust or any  successor  Relevant
Trustee, such retiring Relevant Trustee shall duly assign,  transfer and deliver
to such successor Relevant Trustee all Trust Property,  all proceeds thereof and
money held by such retiring Relevant Trustee hereunder.

         Upon request of any such successor  Relevant  Trustee,  the Trust shall
execute  any and all  instruments  for more fully and  certainly  vesting in and
confirming to such successor Relevant Trustee all such rights, powers and trusts
referred to in the first or second preceding paragraph, as the case may be.

         No successor  Relevant  Trustee shall accept its appointment  unless at
the time of such acceptance such successor  Relevant  Trustee shall be qualified
and eligible under this Article.

         SECTION  8.11  Merger,  Conversion,   Consolidation  or  Succession  to
Business. Any Person into which the Property Trustee or any Regular Trustee that
is not a  natural  person  may be merged or  converted  or with  which it may be
consolidated,   or  any  Person   resulting  from  any  merger,   conversion  or
consolidation  to  which  such  Relevant  Trustee  shall  be  a  party,  or  any
corporation  succeeding to all or substantially all the corporate trust business
of such  Relevant  Trustee,  shall be the  successor  of such  Relevant  Trustee
hereunder,  provided such Person shall be otherwise qualified and eligible under
this Article, without the execution or filing of any paper or any further act on
the part of any of the parties hereto.

         SECTION  8.12  Preferential  Collection  of Claims  Against  Sponsor or
Trust.  If and when the  Property  Trustee  shall be or become a creditor of the
Sponsor or the Trust (or any other obligor upon the Debt Securities or the Trust
Securities), the Property Trustee shall be subject to and shall take all actions
necessary  in order to comply with the  provisions  of the Trust  Indenture  Act
regarding  the  collection  of claims  against the Sponsor or Trust (or any such
other obligor).

         SECTION 8.13 Reports by Property  Trustee.  Within 60 days after May 15
of each year,  commencing  with the first May 15,  after the first  issuance  of
Preferred  Securities,  the Property Trustee shall provide to the Holders of the
Preferred  Securities  such  reports as are required by Section 313 of the Trust
Indenture Act, if any, in the form and in the manner  provided by Section 313 of
the Trust  Indenture  Act.  The  Property  Trustee  shall also  comply  with the
requirements of Section 313(d) of the Trust Indenture Act.

         SECTION  8.14  Reports to the  Property  Trustee.  The  Sponsor and the
Regular  Trustees on behalf of the Trust shall  provide to the Property  Trustee
such  documents,  reports and  information as are required by Section 314 of the
Trust Indenture Act (if any) and the

                                       44
<PAGE>

compliance  certificate required by Section 314(a) of the Trust Indenture Act in
the form,  in the manner and at the times  required  by Section 314 of the Trust
Indenture Act.

         SECTION 8.15 Evidence of Compliance with Conditions Precedent.  Each of
the Sponsor and the Regular Trustees on behalf of the Trust shall provide to the
Property Trustee such evidence of compliance with any conditions  precedent,  if
any,  provided for in this Trust Agreement that relate to any of the matters set
forth in Section 314(c) of the Trust  Indenture Act. Any  certificate or opinion
required to be given by an officer  pursuant to Section  314(c)(1)  of the Trust
Indenture Act shall be given in the form of an Officers' Certificate.

         SECTION 8.16 Number of Trustees.

              (a) The  number  of  Trustees  shall be three,  provided  that the
Holder of all of the Common  Securities  by written  instrument  may increase or
decrease the number of Regular Trustees.

              (b) If a Trustee  ceases to hold  office  for any  reason  and the
number of Regular Trustees is not reduced pursuant to Section 8.16(a), or if the
number of Trustees is increased  pursuant to Section  8.16(a),  a vacancy  shall
occur.

              (c)  The  death,  resignation,  retirement,  removal,  bankruptcy,
incompetence  or incapacity to perform the duties of a Trustee shall not operate
to dissolve,  terminate or annul the Trust.  Whenever a vacancy in the number of
Regular Trustees shall occur, until such vacancy is filled by the appointment of
a Regular  Trustee in  accordance  with  Section  8.9,  the Regular  Trustees in
office,  regardless of their number (and  notwithstanding any other provision of
this  Agreement),  shall have all the powers granted to the Regular Trustees and
shall  discharge all the duties imposed upon the Regular  Trustees by this Trust
Agreement.

         SECTION 8.17 Delegation of Power.

              (a) Any Regular Trustee may, by power of attorney  consistent with
applicable  law,  delegate to any other natural person over the age of 21 his or
her power for the purpose of executing  any  documents  contemplated  in Section
2.7(a), including any registration statement or amendment thereof filed with the
Commission, or making any other governmental filing.

              (b) The Regular Trustees shall have power to delegate from time to
time to such of their  number or to the Sponsor the doing of such things and the
execution  of such  instruments  either in the name of the Trust or the names of
the Regular Trustees or otherwise as the Regular Trustees may deem expedient, to
the extent such  delegation is not  prohibited by applicable  law or contrary to
the provisions of the Trust, as set forth herein.

                                   ARTICLE 9
                       DISSOLUTION, LIQUIDATION AND MERGER

         SECTION 9.1 Dissolution upon Expiration Date. Unless earlier dissolved,
the Trust shall dissolve on June 15, 2041 (the "Expiration  Date") or as soon as
possible thereafter.

                                       45
<PAGE>

         SECTION  9.2  Early  Dissolution.  The  first  to  occur  of any of the
following events is an "Early Dissolution Event":

              (a) the  occurrence  of a  Bankruptcy  Event in respect of, or the
dissolution or liquidation  (other than a deemed  liquidation  for tax purposes)
of, the Parent or the Sponsor;

              (b) the  occurrence of a Special Event except in the case of a Tax
Event  following which the Parent has elected (i) to pay any Additional Sums (in
accordance  with  Section  4.4) such that the net amount  received by Holders of
Preferred  Securities in respect of Distributions are not reduced as a result of
such Tax Event and the Parent has not  revoked  any such  election  or failed to
make such payments or (ii) to redeem all or some of the Debt Securities pursuant
to Section 4.4(a);

              (c) the  redemption,  conversion  or  exchange of all of the Trust
Securities;

              (d) an order for  dissolution of the Trust shall have been entered
by a court of competent jurisdiction; and

              (e)  receipt by the  Property  Trustee of written  notice from the
Parent or the Sponsor at any time (which direction is optional and wholly within
the  discretion  of the  Parent  and the  Sponsor,  as the  case  may be) of its
intention to dissolve the Trust and distribute  the Debt  Securities in exchange
for the Preferred Securities.

         SECTION   9.3    Dissolution.    The   respective    obligations    and
responsibilities  of the Trustees  and the Trust  created and  continued  hereby
shall terminate upon the latest to occur of the following:  (a) the distribution
by the Property  Trustee to  Securityholders  upon the  liquidation of the Trust
pursuant to Section 9.4, or upon the  redemption of all of the Trust  Securities
pursuant to Section  4.2, of all amounts  required to be  distributed  hereunder
upon the final payment of the Trust Securities;  (b) the payment of all expenses
owed by the Trust;  and (c) the  discharge of all  administrative  duties of the
Regular  Trustees,  including the  performance of any tax reporting  obligations
with respect to the Trust or the Securityholders.

         SECTION 9.4 Liquidation.

              (a) If an Early  Dissolution  Event  specified in clause (a), (b),
(d) or (e) of Section 9.2 occurs or upon the Expiration Date, the Trust shall be
liquidated  by the Trustees as  expeditiously  as the  Trustees  determine to be
possible by distributing,  after satisfaction of liabilities to creditors of the
Trust as  provided  by  applicable  law,  to each  Securityholder  an  aggregate
principal amount of Debt Securities equal to the aggregate Liquidation Amount of
Trust  Securities  held by such  Holder,  subject to Section  9.4(d).  Notice of
liquidation shall be given by the Property Trustee by first-class mail,  postage
prepaid, mailed not later than 30 nor more than 60 days prior to the Liquidation
Date to each Holder of Trust  Securities at such Holder's  address as it appears
in the Securities Register.  All notices of liquidation shall be prepared by the
Regular Trustees and shall:

                  (i) state the Liquidation Date;

                                       46
<PAGE>

                  (ii) state  that,  from and after the  Liquidation  Date,  the
         Trust  Securities  will no longer be deemed to be  Outstanding  and any
         Trust  Securities  Certificates  not  surrendered  for exchange will be
         deemed to represent an aggregate  principal  amount of Debt  Securities
         equal to the aggregate  Liquidation Amount of Preferred Securities held
         by such Holder; and

                  (iii) provide such  information  with respect to the mechanics
         by which Holders may exchange Trust  Securities  Certificates  for Debt
         Securities,  or, if  Section  9.4(d)  applies,  receive  a  Liquidation
         Distribution,  as the Regular  Trustees or the Property  Trustee  shall
         deem appropriate.

              (b) Except where  Section  9.2(c) or 9.4(d)  applies,  in order to
effect the  liquidation of the Trust and  distribution of the Debt Securities to
Securityholders,  the Property  Trustee  shall  establish a record date for such
distribution (which date shall be not more than 45 days prior to the Liquidation
Date and, unless the Property  Trustee  determines  otherwise,  (i) shall be the
date which,  for so long as the Preferred  Securities  remain in book-entry form
only, is one Business Day before the Liquidation  Date, or (ii) if the Preferred
Securities  are no longer in  book-entry  form only,  shall be the fifteenth day
before the Liquidation  Date (whether or not a Business Day)) and, either itself
acting as  exchange  agent or through  the  appointment  of a separate  exchange
agent,  shall establish such  procedures as it shall deem  appropriate to effect
the  distribution  of Debt  Securities  in exchange  for the  Outstanding  Trust
Securities Certificates.

              (c)  Except  where  Section  9.2(c) or 9.4(d)  applies,  after the
Liquidation  Date,  (i) the  Trust  Securities  will no  longer  be deemed to be
Outstanding,  (ii) the Clearing  Agency or its nominee,  as the record holder of
such  Trust  Securities,   will  receive  a  registered  global  certificate  or
certificates  representing  the  Debt  Securities  to  be  delivered  upon  such
distribution  and  (iii)  any  Trust  Securities  Certificates  not  held by the
Clearing  Agency will be deemed to represent an  aggregate  principal  amount of
Debt  Securities  equal  to  the  aggregate   Liquidation  Amount  of  Preferred
Securities  held by such Holders,  and bearing accrued and unpaid interest in an
amount equal to the accrued and unpaid  Distributions  on such Trust  Securities
until such  certificates  are presented to the Property  Trustee for transfer or
reissuance.

              (d) In the event that,  notwithstanding  the other  provisions  of
this Section 9.4, whether because of an order for dissolution entered by a court
of competent  jurisdiction or otherwise,  distribution of the Debt Securities in
the manner  provided  herein is  determined  by the  Property  Trustee not to be
practicable,  the Trust  Property  shall be  liquidated,  and the Trust shall be
wound-up or terminated,  by the Property  Trustee in such manner as the Property
Trustee  determines,  and a majority  of the  Regular  Trustees  shall  prepare,
execute and file the  certificate of cancellation  with the State  Department of
Assessments  and Taxation of Maryland.  In such event,  Securityholders  will be
entitled to receive out of the assets of the Trust available for distribution to
Securityholders,  after satisfaction of liabilities to creditors of the Trust as
provided by applicable law, an amount equal to the Liquidation  Amount per Trust
Security  plus accrued and unpaid  Distributions  thereon to the date of payment
(such amount being the "Liquidation Distribution"). If, upon any such winding-up
or termination,  the Liquidation  Distribution  can be paid only in part because
the  Trust  has  insufficient  assets  available  to pay in full  the  aggregate
Liquidation  Distribution,  then, subject to the next succeeding  sentence,  the
amounts payable by the Trust on the Trust Securities shall be paid on a pro rata
basis (based upon Liquidation

                                       47
<PAGE>

Amounts).  The  Holder of the  Common  Securities  will be  entitled  to receive
Liquidation  Distributions  upon any such  winding-up  or  termination  pro rata
(determined as aforesaid) with Holders of Preferred Securities,  except that, if
a Indenture  Event of Default has  occurred  and is  continuing,  the  Preferred
Securities shall have a priority over the Common Securities.

         SECTION 9.5 Mergers,  Consolidations  or Replacements of the Trust. The
Trust may not merge with or into,  consolidate,  or be  replaced  by, or convey,
transfer or lease its properties and assets  substantially as an entirety to any
Person,  except  pursuant to this  Section 9.5 or Section 9.4. At the request of
the Sponsor, with the consent of the Regular Trustees and without the consent of
the Property Trustee or the Holders of the Preferred  Securities,  the Trust may
merge with or into, consolidate, be replaced by or convey, transfer or lease its
properties and assets  substantially as an entirety to a trust organized as such
under the laws of any state; provided, that (i) such successor entity either (a)
expressly  assumes  all of the  obligations  of the Trust  with  respect  to the
Preferred  Securities  or (b)  substitutes  for the Preferred  Securities  other
securities having  substantially the same terms as the Preferred Securities (the
"Successor Securities") so long as the Successor Securities rank the same as the
Preferred Securities rank in priority with respect to Distributions and payments
upon liquidation,  redemption and otherwise, (ii) the Sponsor expressly appoints
a trustee of such successor entity  possessing the same powers and duties as the
Property  Trustee  as the  holder of the Debt  Securities,  (iii) the  Successor
Securities  are  listed,  or  any  Successor  Securities  will  be  listed  upon
notification  of  issuance,   on  any  national  securities  exchange  or  other
organization  on which the Preferred  Securities  are then listed,  if any, (iv)
such merger, consolidation,  replacement, conveyance, transfer or lease does not
cause the  Preferred  Securities  (including  any  Successor  Securities)  to be
downgraded by any nationally  recognized  statistical rating  organization,  (v)
such merger, consolidation,  replacement, conveyance, transfer or lease does not
adversely  affect the rights,  preferences  and privileges of the Holders of the
Preferred  Securities  (including  any  Successor  Securities)  in any  material
respect (other than with respect to any dilution of the Holder's interest in the
new entity), (vi) such successor entity has a purpose substantially identical to
that of the  Trust,  (vii)  prior to such  merger,  consolidation,  replacement,
conveyance,  transfer or lease the Sponsor has received an Opinion of Counsel to
the  effect  that  (a)  such  merger,  consolidation,  replacement,  conveyance,
transfer  or  lease  does not  adversely  affect  the  rights,  preferences  and
privileges of the Holders of the Preferred  Securities  (including any Successor
Securities) in any material  respect (other than with respect to any dilution of
the  Holder's   interest  in  the  new  entity),   (b)  following  such  merger,
consolidation,  replacement, conveyance, transfer or lease neither the Trust nor
such  successor  entity will be required  to register as an  investment  company
under the 1940 Act, and (c) following such merger,  consolidation,  replacement,
the Trust or such successor entity will be treated as a grantor trust for United
States  federal  income tax  purposes  and (viii) the  Sponsor or any  permitted
successor or assignee owns, directly or indirectly, all of the common securities
of such successor entity and guarantees the obligations of such successor entity
under the Successor Securities at least to the extent provided by the Guarantee.
Notwithstanding  the foregoing,  the Trust shall not, except with the consent of
Holders of 100% in aggregate  Liquidation  Amount of the  Preferred  Securities,
consolidate, merge with or into, be replaced by or convey, transfer or lease its
properties and assets substantially as an entirety to any other entity or permit
any other  entity to  consolidate,  merge  with or into,  or  replace it if such
consolidation,  merger, replacement,  conveyance,  transfer or lease would cause
the Trust or the successor entity to be classified as other than a grantor trust
for United States federal income tax purposes.

                                       48
<PAGE>

                                   ARTICLE 10
                            MISCELLANEOUS PROVISIONS

         SECTION 10.1 Limitation of Rights of Securityholders. Other than as set
forth  in  Section  9.1,  the  death,  incapacity,  dissolution,  bankruptcy  or
termination of any Person having an interest,  beneficial or otherwise, in Trust
Securities  shall not  operate to  dissolve  the Trust or  terminate  this Trust
Agreement,  nor entitle the legal representatives or heirs of such Person or any
Securityholder for such Person to claim an accounting,  take any action or bring
any  proceeding in any court for a partition or  winding-up of the  arrangements
contemplated   hereby,   nor  otherwise  affect  the  rights,   obligations  and
liabilities of the parties hereto or any of them.

         SECTION 10.2 Amendment.

              (a) This Trust  Agreement  may be amended from time to time by the
Trustees and the  Sponsor,  without the consent of any  Securityholders,  (i) to
cure any  ambiguity,  correct or supplement  any  provision  herein which may be
inconsistent  with any other provision  herein,  or to make any other provisions
with respect to matters or questions  arising under this Trust Agreement,  which
shall not be  inconsistent  with the other  provisions of this Trust  Agreement,
(ii) to modify,  eliminate or add to any  provisions of this Trust  Agreement to
such extent as shall be  necessary  to ensure that the Trust will be  classified
for United  States  federal  income tax purposes as a grantor trust at all times
that any Trust  Securities are  Outstanding or to ensure that the Trust will not
be required to register  as an  "investment  company"  under the 1940 Act, or be
classified as other than a grantor trust for United  States  federal  income tax
purposes, or (iii) to comply with the requirements of the Commission in order to
effect or maintain the  qualification  of this Trust  Agreement  under the Trust
Indenture Act;  provided,  however,  that in the case of clause (i), such action
shall  not  adversely  affect  in any  material  respect  the  interests  of any
Securityholder,  and any such  amendments of this Trust  Agreement  shall become
effective when notice thereof is given to the Securityholders.

              (b) Except as provided in Section 10.2(c) hereof, any provision of
this Trust Agreement may be amended by the Trustees and the Sponsor with (i) the
consent of Holders representing not less than a majority (based upon Liquidation
Amounts) of the Trust Securities then Outstanding, acting as a single class, and
(ii)  receipt by the  Trustees  of an Opinion of Counsel to the effect that such
amendment  or the exercise of any power  granted to the  Trustees in  accordance
with such  amendment  will not affect the Trust's  status as a grantor trust for
United  States  federal  income tax purposes or the Trust's  exemption  from the
status of an "investment company" under the 1940 Act, provided,  however, if any
amendment or proposal that would  adversely  affect the powers,  preferences  or
special  rights  of  the  Trust  Securities,  whether  by way  of  amendment  or
otherwise,  would  adversely  affect only the  Preferred  Securities or only the
Common Securities, then only the affected class will be entitled to vote on such
amendment  or proposal  and such  amendment  or proposal  shall not be effective
except with the  approval of a majority in  Liquidation  Amount of such class of
Trust Securities.

              (c) In addition to and notwithstanding any other provision in this
Trust  Agreement,  without the  consent of each  affected  Securityholder  (such
consent being obtained in accordance with Section 6.3 or 6.6 hereof), this Trust
Agreement  may  not be  amended  to (i)  change  the  amount  or  timing  of any
Distribution on the Trust Securities or otherwise adversely affect the amount of
any Distribution  required to be made in respect of the Trust Securities as of

                                       49
<PAGE>

a specified  date or (ii)  restrict the right of a  Securityholder  to institute
suit  for  the   enforcement  of  any  such  payment  on  or  after  such  date;
notwithstanding any other provision herein, without the unanimous consent of the
Securityholders  (such consent being obtained in accordance  with Section 6.3 or
6.6 hereof), this paragraph (c) of this Section 10.2 may not be amended.

              (d)  Notwithstanding any other provisions of this Trust Agreement,
no Trustee shall enter into or consent to any amendment to this Trust  Agreement
which would cause the Trust to fail or cease to qualify for the  exemption  from
the status of an  "investment  company"  under the 1940 Act or be  classified as
other than a grantor trust for United States federal income tax purposes.

              (e)  Notwithstanding  anything  in  this  Trust  Agreement  to the
contrary,  without the consent of the Sponsor,  this Trust  Agreement may not be
amended in a manner which imposes any additional obligation on the Sponsor.

              (f) In the event that any  amendment  to this Trust  Agreement  is
made, the Regular  Trustees shall promptly provide to the Sponsor a copy of such
amendment.

              (g) The Property  Trustee  shall not be required to enter into any
amendment  to this Trust  Agreement  which  affects  its own  rights,  duties or
immunities under this Trust Agreement. The Property Trustee shall be entitled to
receive an Opinion of Counsel  and an  Officers'  Certificate  stating  that any
amendment to this Trust Agreement is in compliance with this Trust Agreement and
that all conditions precedent,  if any, in this Trust Agreement to the execution
and delivery of such amendment have been satisfied.

         SECTION  10.3  Separability.  In  case  any  provision  in  this  Trust
Agreement or in the Trust Securities  Certificates shall be invalid,  illegal or
unenforceable,  the  validity,  legality  and  enforceability  of the  remaining
provisions shall not in any way be affected or impaired thereby.

         SECTION 10.4 Governing Law. EXCEPT AS PROVIDED IN SECTION 10.10 HEREOF,
THIS  TRUST   AGREEMENT  AND  THE  RIGHTS  AND   OBLIGATIONS   OF  EACH  OF  THE
SECURITYHOLDERS, THE TRUST AND TRUSTEES WITH RESPECT TO THIS TRUST AGREEMENT AND
THE TRUST  SECURITIES  SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE
LAWS OF THE STATE OF MARYLAND WITHOUT REGARD TO ITS CONFLICT OF LAWS PRINCIPLES.

         SECTION 10.5  Payments Due on  Non-Business  Day. If the date fixed for
any payment on any Trust  Security  shall be a day which is not a Business  Day,
then  such  payment  need  not be made on such  date but may be made on the next
succeeding  day which is a Business Day except as otherwise  provided in Section
4.1(a) and Section 4.2(d),  with the same force and effect as though made on the
date fixed for such payment, and no interest shall accrue thereon for the period
after such date.

         SECTION 10.6 Successors. This Trust Agreement shall be binding upon and
shall inure to the benefit of any  successor  to the  Sponsor,  the Trust or the
Relevant  Trustee,  including  any  successor  by  operation  of law.  Except in
connection with a transaction that is permitted under Article 8 of the Indenture
and  pursuant to which the assignee  agrees in writing to perform the  Sponsor's
obligations hereunder, the Sponsor shall not assign its obligations hereunder.

                                       50
<PAGE>

         SECTION  10.7  Headings.  The  Article  and  Section  headings  are for
convenience only and shall not affect the construction of this Trust Agreement.

         SECTION 10.8 Reports,  Notices and Demands. Any report,  notice, demand
or other  communication  which  by any  provision  of this  Trust  Agreement  is
required or permitted to be given or served to or upon any Securityholder or the
Sponsor  may be given or served  in  writing  by  deposit  thereof,  first-class
postage  prepaid,  in  the  United  States  mail,  hand  delivery  or  facsimile
transmission,  in each case, addressed, (a) in the case of a Holder of Preferred
Securities,  to such Holder as such  Holder's name and address may appear on the
Securities Register; and (b) in the case of the Holder of the Common Securities,
to SNH Capital Trust Holdings,  c/o Senior Housing  Properties Trust, 400 Centre
Street, Newton, Massachusetts 02458.

         Any notice,  demand or other  communication  which by any  provision of
this Trust  Agreement  is required or permitted to be given or served to or upon
the Trust,  the  Property  Trustee  or the  Regular  Trustees  shall be given in
writing  addressed (until another address is published by the Trust) as follows:
(a) with  respect  to the  Property  Trustee,  to State  Street  Bank and  Trust
Company, 2 Avenue de Lafayette, Boston, Massachusetts,  02111 Attention: Paul D.
Allen,  Corporate Trust Department and (b) with respect to the Regular Trustees,
to them at the address for notices to the Sponsor, marked "Attention:  Gerard M.
Martin and Barry M. Portnoy.  Such notice,  demand or other  communication to or
upon the Trust or the Property Trustee shall be deemed to have been sufficiently
given or made  only  upon  actual  receipt  of the  writing  by the Trust or the
Property Trustee.

         SECTION 10.9  Agreement  Not to Petition.  Each of the Trustees and the
Sponsor agrees for the benefit of the  Securityholders  that, until at least one
year and one day after the Trust has been  dissolved in accordance  with Article
9, it shall not file,  or join in the filing of, a  petition  against  the Trust
under any Bankruptcy Law or otherwise join in the commencement of any proceeding
against the Trust  under any  Bankruptcy  Law.  In the event the  Sponsor  takes
action in violation of this Section 10.9, the Property  Trustee agrees,  for the
benefit of  Securityholders,  that, at the expense of the Sponsor, it shall file
an answer with the bankruptcy court or otherwise  properly contest the filing of
such  petition by the  Sponsor  against  the Trust or the  commencement  of such
action and raise the defense  that the Sponsor has agreed in writing not to take
such  action  and  should be  stopped  and  precluded  therefrom  and such other
defenses,  if any,  as  counsel  for the  Trustee or the Trust may  assert.  The
provisions  of this Section  10.9 shall  survive the  dissolution  of this Trust
Agreement.

         SECTION 10.10 Trust Indenture Act; Conflict with Trust Indenture Act.

              (a) This Trust Agreement is subject to the provisions of the Trust
Indenture Act that are required to be part of this Trust Agreement and shall, to
the extent applicable, be governed by such provisions.

              (b) The Property  Trustee  shall be the only Trustee  which is the
trustee for the purposes of the Trust Indenture Act.

                                       51
<PAGE>

              (c) If any provision  hereof  limits,  qualifies or conflicts with
another  provision  hereof  which  is  required  to be  included  in this  Trust
Agreement by any of the  provisions  of the Trust  Indenture  Act, such required
provision shall control.  If any provision of this Trust  Agreement  modifies or
excludes any  provision of the Trust  Indenture  Act which may be so modified or
excluded,  the latter provision shall be deemed to apply to this Trust Agreement
as so modified or to be excluded, as the case may be.

              (d) The  application  of the  Trust  Indenture  Act to this  Trust
Agreement  shall  not  affect  the  nature  of the  Trust  Securities  as equity
securities  representing  undivided  beneficial  interests  in the assets of the
Trust.

         SECTION  10.11  Acceptance of Terms of Trust  Agreement,  Guarantee and
Indenture.  THE  RECEIPT AND  ACCEPTANCE  OF A TRUST  SECURITY  OR ANY  INTEREST
THEREIN BY OR ON BEHALF OF A  SECURITYHOLDER  OR BENEFICIAL  OWNER,  WITHOUT ANY
SIGNATURE OR FURTHER MANIFESTATION OF ASSENT, SHALL CONSTITUTE THE UNCONDITIONAL
ACCEPTANCE BY THE SECURITYHOLDER AND ALL OTHERS HAVING A BENEFICIAL  INTEREST IN
SUCH TRUST SECURITY OF ALL THE TERMS AND PROVISIONS OF THIS TRUST  AGREEMENT AND
AGREEMENT TO  SUBORDINATION  PROVISIONS AND OTHER TERMS OF THE GUARANTEE AND THE
INDENTURE,  AND SHALL CONSTITUTE THE AGREEMENT OF THE TRUST, SUCH SECURITYHOLDER
AND SUCH OTHERS THAT THE TERMS AND PROVISIONS OF THIS TRUST  AGREEMENT  SHALL BE
BINDING,  OPERATIVE  AND  EFFECTIVE  AS THE  AGREEMENT  OF THE  TRUST  AND  SUCH
SECURITYHOLDER AND SUCH OTHERS.

         SECTION 10.12 Counterparts.  This Trust Agreement may contain more than
one  counterpart of the signature page and this Trust  Agreement may be executed
by the  affixing  of the  signature  of  each  of the  Trustees  to one of  such
counterpart  signature pages.  All of such counterpart  signature pages shall be
read as though one,  and they shall have the same force and effect as though all
of the signers had signed a single signature page.

         IN WITNESS WHEREOF, the parties hereto have caused this Trust Agreement
to be duly executed as of the day and year first above written.

                                 SNH CAPITAL TRUST HOLDINGS, as Sponsor

                                 By: /s/ David J. Hegarty
                                     Name: David J. Hegarty
                                     Title:  President

                                       52
<PAGE>

                                 STATE STREET BANK AND TRUST
                                 COMPANY, as Property Trustee

                                 By: /s/ Paul D. Allen
                                     Name: Paul D. Allen
                                     Title:  Vice President

                                 /s/ Gerard M. Martin
                                 Gerard M. Martin, as Regular Trustee and
                                 not individually

                                 /s/ Barry M. Portnoy
                                 Barry M. Portnoy, as Regular Trustee and
                                 not individually

                                       53
<PAGE>
                                                                       EXHIBIT A

                               SNH CAPITAL TRUST I

                              CERTIFICATE OF TRUST

         THIS IS TO CERTIFY THAT:

         FIRST:  The undersigned  trustees hereby form a business trust pursuant
to the laws of the State of Maryland.

         SECOND: The name of the business trust (the "Trust") is:

                               SNH Capital Trust I

         THIRD:  The  address of the  Trust's  principal  office in the State of
Maryland is c/o Ballard Spahr Andrews & Ingersoll, LLP, 300 East Lombard Street,
Baltimore, Maryland 21202, Attention: James J. Hanks, Jr.

         FOURTH: The name and business address of the Trust's resident agent are
James J. Hanks,  Jr.,  c/o Ballard  Spahr  Andrews &  Ingersoll,  LLP,  300 East
Lombard Street, Baltimore, Maryland 21202.

         The  undersigned,  being all of the trustees of the Trust,  acknowledge
under the penalties of perjury,  that to the best of their knowledge and belief,
the facts stated herein are true.

         IN WITNESS WHEREOF,  each of the undersigned  trustees have signed this
Certificate of Trust this 4th day of May, 2001.

                                  ______________________________
                                  Gerard M. Martin

                                  ______________________________
                                  Barry M. Portnoy

                                      A-1
<PAGE>
                                                                       EXHIBIT B

                Form of Common Securities of SNH Capital Trust I

THIS CERTIFICATE IS NOT TRANSFERABLE  EXCEPT TO AN ENTITY WHOLLY OWNED BY SENIOR
HOUSING  PROPERTIES TRUST OR TO CERTAIN  SUCCESSORS OF SENIOR HOUSING PROPERTIES
TRUST.

Certificate Number __                           Number of Common Securities ___

                    CERTIFICATE EVIDENCING COMMON SECURITIES
                                       OF
                               SNH CAPITAL TRUST I

                            10.125% Common Securities
                 (Liquidation Amount $25.00 per Common Security)

         SNH Capital  Trust I, a business  trust  created  under the laws of the
State    of    Maryland     (the     "Trust"),     hereby     certifies     that
_________________________________________________   (the   "Holder"),   is   the
registered  owner  of  ________  common  securities  of the  Trust  representing
undivided  beneficial  interests  in  the  assets  of  the  Trust  (the  "Common
Securities").  Except as set forth in Section  5.10 of the Trust  Agreement  (as
defined below),  the Common  Securities are not  transferable  and any attempted
transfer   hereof  shall  be  void.  The   designations,   rights,   privileges,
restrictions,   preferences  and  other  terms  and  provisions  of  the  Common
Securities  are set forth in, and this  certificate  and the  Common  Securities
represented  hereby are issued and shall in all respects be subject to the terms
and provisions  of, the Amended and Restated Trust  Agreement of the Trust dated
as of June 21,  2001,  as the same may be amended  from time to time (the "Trust
Agreement")  including the designation of the terms of the Common  Securities as
set forth therein.  The Trust will furnish a copy of the Trust Agreement and the
Guarantee to the Holder without charge upon written  request to the Trust at its
principal place of business or registered office.

         Upon  receipt  of this  certificate,  the  Holder is bound by the Trust
Agreement and is entitled to the benefits thereunder.

         IN  WITNESS  WHEREOF,  one of the  Regular  Trustees  of the  Trust has
executed this certificate.

Dated:  June __, 2001              SNH CAPITAL TRUST I

                                   By: ______________________________________
                                   Name:___________________________
                                        As Regular Trustee and not individually

<PAGE>

                PROPERTY TRUSTEE'S CERTIFICATE OF AUTHENTICATION

         This   is  one   of  the   Common   Securities   referred   to  in  the
within-mentioned Trust Agreement.

                                   STATE STREET BANK AND TRUST
                                     COMPANY, as Property Trustee

                                   By:_____________________________________
                                        Name:
                                        Title:

                                      B-2
<PAGE>
                                                                       EXHIBIT C

               Form of Preferred Securities of SNH Capital Trust I

         [This  Preferred   Security  is  a  Book-Entry   Preferred   Securities
Certificate  within the meaning of the Trust Agreement  hereinafter  referred to
and is  registered  in the name of The  Depository  Trust  Company  ("DTC") or a
nominee of DTC. This Preferred Security is exchangeable for Preferred Securities
registered  in the name of a person  other than DTC or its  nominee  only in the
limited  circumstances  described in the Trust Agreement and no transfer of this
Preferred  Security (other than a transfer of this Preferred Security as a whole
by DTC to a nominee of DTC or by a nominee  of DTC to DTC or another  nominee of
DTC) may be registered except in limited circumstances.]

         [Unless this  certificate is presented by an authorized  representative
of The Depository Trust Company,  a New York corporation  ("DTC"),  to Issuer or
its agent for registration of transfer, exchange or payment, and any certificate
issued  is  registered  in the name of Cede & Co.  or in such  other  name as is
requested  by an  authorized  representative  of DTC (and any payment is made to
Cede  &  Co.  or  to  such  other  entity  as  is  requested  by  an  authorized
representative  of DTC),  ANY TRANSFER,  PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE  BY OR TO ANY PERSON IS  WRONGFUL  inasmuch  as the  registered  owner
hereof, Cede & Co., has an interest herein.]

Certificate Number ____                    Number of Preferred Securities ____

                            [CUSIP NO. _____________]

                   CERTIFICATE EVIDENCING PREFERRED SECURITIES
                                       OF
                               SNH CAPITAL TRUST I

                       10.125% Trust Preferred Securities
               (Liquidation Amount $25.00 per Preferred Security)

         SNH Capital  Trust I, a business  trust  created  under the laws of the
State of Maryland (the "Trust"), hereby certifies that __________________ or its
registered assigns (the "Holder") is the registered owner of ___________________
(_______) preferred securities of the Trust representing an undivided beneficial
interest  in the  assets of the Trust and  designated  the SNH  Capital  Trust I
10.125%  Trust  Preferred  Securities  (Liquidation  Amount $25.00 per Preferred
Security) (the  "Preferred  Securities").  Except to the extent set forth in the
Trust Agreement (as defined below), the Preferred Securities are transferable on
the books and records of the Trust, in person or by a duly authorized  attorney,
upon surrender of this certificate duly endorsed and in proper form for transfer
as provided  in Section  5.4 of the Trust  Agreement  (as  defined  below).  The
designations, rights, privileges, restrictions,  preferences and other terms and
provisions of the Preferred  Securities  are set forth in, and this  certificate
and the  Preferred  Securities  represented  hereby  are issued and shall in all
respects be subject to the terms and  provisions  of, the  Amended and  Restated
Trust  Agreement  of the  Trust  dated  as of June  21,  2001 as the same may be
amended from time to time (the "Trust  Agreement")  including the designation of
the terms of Preferred  Securities as set forth therein.  The Holder is entitled
to the  benefits  of the  Guarantee  Agreement  entered  into by Senior  Housing
Properties Trust, a Maryland real estate

<PAGE>

investment trust, and State Street Bank and Trust Company, as Guarantee Trustee,
dated as of June 21, 2001 (the "Guarantee"), to the extent provided therein. The
Trust will furnish a copy of the Trust Agreement and the Guarantee to the Holder
without  charge  upon  written  request to the Trust at its  principal  place of
business or registered office.

         Upon  receipt  of this  certificate,  the  Holder is bound by the Trust
Agreement and is entitled to the benefits thereunder.

         IN  WITNESS  WHEREOF,  one of the  Regular  Trustees  of the  Trust has
executed this certificate.

Dated:  June __, 2001             SNH CAPITAL TRUST I

                                  By: ______________________________
                                       Name: ___________________
                                       As Regular Trustee and not individually

                                      C-2
<PAGE>

                PROPERTY TRUSTEE'S CERTIFICATE OF AUTHENTICATION

         This  is  one  of  the   Preferred   Securities   referred  to  in  the
within-mentioned Trust Agreement.

                                     STATE STREET BANK AND TRUST
                                       COMPANY, as Property Trustee

                                     By:  ______________________________
                                           Name:
                                           Title:

                                      C-3

<PAGE>

                                   ASSIGNMENT

         FOR  VALUE  RECEIVED,   the  undersigned  assigns  and  transfers  this
Preferred Security to:

------------------------------------------------------------------------------

------------------------------------------------------------------------------

------------------------------------------------------------------------------
(Insert assignee's social security or tax identification number)

------------------------------------------------------------------------------

------------------------------------------------------------------------------
(Insert address and zip code of assignee)

and irrevocably appoints

------------------------------------------------------------------------------

------------------------------------------------------------------------------
agent to transfer  this  Preferred  Securities  Certificate  on the books of the
Trust. The agent may substitute another to act for him or her.

Date:  ______________________________

Signature:  _________________________

(Sign  exactly  as your  name  appears  on the  other  side  of  this  Preferred
Securities Certificate)

                                      C-4
<PAGE>

                     [TO BE ATTACHED TO GLOBAL CERTIFICATE]

                                   SCHEDULE A

         The  initial  Liquidation  Amount of this Global  Certificate  shall be
$_____________.  The following  increases or decreases in the Liquidation Amount
of this Global Certificate have been made:

<TABLE>
<CAPTION>

                         Amount of Increase
                          in Liquidation
                          Amount of This                                 Liquidation Amount
                          Global Certificate     Amount of Decrease in   of this Global         Signature of
                          Including Upon         Liquidation Amount of   Certificate            Authorized Officer
                          Exercise of            this Global             Following such         of Trustee or
Date Made                 Over-Allotment Option  Certificate             Decrease or Increase   Securities Custodian
----------------------------------------------- --------------------------------------------------------------------
<S>                       <C>                      <C>                   <C>                      <C>

</TABLE>

                                      C-5

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