Document:

Exhibit 10.22

                            FOURTH AMENDMENT OF LEASE

         This Fourth Amendment of Lease (this "Amendment") is made this 4 day of
August, 2000, between SPTMRT Properties Trust, a Maryland real estate investment
trust  ("Landlord"),  and  Marriott  Senior  Living  Services,  Inc., a Delaware
corporation ("Tenant").

                                    Recitals:

         A.       Whereas,   HMC   Retirement   Properties,   Inc.,  a  Delaware
                  corporation  ("HMC"),  as Landlord and Marriott  Senior Living
                  Services,  Inc.  ("MSLS") as Tenant  entered into that certain
                  Facilities  Lease  Agreement  for the Marriott  Senior  Living
                  Services  Facilities  of   Bellaire/Houston,   Harris  County,
                  Houston,  Texas, on October 8, 1993,  which  Facilities  Lease
                  Agreement  was amended on January 19,  1994,  May 16, 1994 and
                  October  10,  1997 (said  Facilities  Lease  Agreement,  as so
                  amended hereinafter referred to as the "Lease"); and

         B.       Whereas,  pursuant to the terms of that certain Assignment and
                  Assumption of Leases,  Guarantees and Permits  between HMC and
                  HRPT Properties Trust, formally known as Health and Retirement
                  Properties  Trust,  a Maryland  real estate  investment  trust
                  ("HRPT"),  dated  May 13,  1994,  HRPT  assumed  all of  HMC's
                  rights, title and interest in and to the Lease; and

         C.       Whereas, on or about June 30, 1999, HRPT assigned the Lease to
                  Landlord; and

         D.       Whereas  Landlord  and  Tenant  now  wish to  provide  for the
                  amendment of the Lease on the terms and  conditions  set forth
                  herein.

         Now,  therefore,   in  consideration  of  the  mutual  obligations  and
agreements  set forth  below,  the  sufficiency  and receipt of which are hereby
acknowledged, Landlord and Tenant agree as follows:

                  1.       Section 5.03 shall be amended by adding the following
                           new section:

                           "C. Commencing with the third Fiscal Quarter of 2000,
                           Tenant shall,  within forty-five (45) days of the end
                           of each Fiscal Quarter  furnish to Landlord a report,
                           for the immediately preceding Fiscal Quarter and year
                           to date, which shall include the following:

                           A.       A schedule of revenue by type of unit (i.e.,
                                    assisted living,  special care, and nursing)
                                    and by source  (i.e.,  Medicare  or  private
                                    pay);

                           B.       A schedule  of the  occupancy  and number of
                                    each  type of unit  at the  Premises  (i.e.,
                                    assisted living, special care and nursing);

<PAGE>

                           C.       A schedule of operating expenses by category
                                    including real estate taxes; and

                           D.       Such  other   financial   information   that
                                    Landlord may reasonably request from time to
                                    time, provided however, that such additional
                                    financial  information requested by Landlord
                                    must be of the type and nature  that  Tenant
                                    generally  provides  to other  Owners of its
                                    leased senior living  communities.  Attached
                                    hereto as Exhibit A is the form of reporting
                                    that Tenant currently provides to its owners
                                    and will serve as the form for the reporting
                                    to  Landlord   pursuant   to  this   Section
                                    5.03(C)."

                  2.       All  capitalized  terms not defined herein shall have
                           the meaning set forth on the Lease; and

                  3.       Any conflict between the terms and conditions of this
                           Amendment and the Lease shall be resolved in favor of
                           this Amendment; and

                  4.       Other than as modified  herein,  all of the terms and
                           provisions  of this Lease shall  remain in full force
                           and effect.

         IN WITNESS  WHEREOF,  Landlord and Tenant have  executed and  delivered
this Amendment on the date first hereinabove set forth.

                                         TENANT

Attest:                                  Marriott Senior Living Services, Inc.
                                         a Delaware corporation

By: /s/ Michael J. Stein                 By: /s/ Michael J. Giacopelli, Jr.
    ---------------------------------        -----------------------------------
    Name:    Michael J. Stein                Name:    Michael J. Giacopelli, Jr.
    Title:   Assistant Secretary             Title:   Vice President

                                             [SEAL]

                                         LANDLORD

Attest:                                  SPTMRT Properties Trust
                                         a Maryland real estate trust

By: /s/ Jennifer B. Clark                By: /s/ David J. Hegarty
    ---------------------------------        -----------------------------------
    Name:                                    Its: President

                                             [SEAL]

<PAGE>

                                         GUARANTOR

Attest:                                  Marriott International, Inc.
                                         a Delaware corporation

By: /s/ Edward L. Bednarz                By: /s/ Myron D. Walker
    ---------------------                    -----------------------------------
    Name:    Edward L. Bednarz               Name:    Myron D. Walker
    Title:   Assistant Secretary             Title:   Vice President

                                             [SEAL]

<PAGE>

                           Schedule to Exhibit 10.22

         Pursuant  to  Instruction  2 to Item  601(a)  of  Regulation  S-K,  the
following Fourth Amendments of Leases, which are substantially  identical in all
material  respects to the Fourth  Amendment of Lease  concerning  the Facilities
Lease  Agreement  for  the  Marriott   Senior  Living  Services   Facilities  of
Bellaire/Houston,  Houston, TX, filed herewith,  are omitted. The following list
sets forth the material differences in the premises leased and the tenants.

<TABLE>
<CAPTION>
Leased Premises                                                    Tenant

<S>                                                                <C>
(1)      Marriott Senior Living Services Facilities of             Marriott Senior Living Services, Inc.
         Scottsdale, Scottsdale, AZ

(2)      Marriott Senior Living Services Facilities of             Marriott Senior Living Services, Inc.
         Sun City, Sun City, AZ

(3)      Marriott Senior Living Services Facilities of             Marriott Senior Living Services, Inc.
         Villa Valencia, Laguna Hills, CA

(4)      Marriott Senior Living Services Facilities of             Marriott Senior Living Services, Inc.
         Deerfield Beach/Horizon Club, Deerfield Beach,
         FL

(5)      Marriott Senior Living Services Facilities of             Marriott Senior Living Services, Inc.
         Palm Harbour, Palm Harbor, FL

(6)      Marriott Senior Living Services Facilities of             Marriott Senior Living Services, Inc.
         Port St. Lucie, Port St. Lucie, FL

(7)      Marriott Senior Living Services Facilities of             Marriott Continuing Care, LLC
         Bedford Court, Silver Spring, MD

(8)      Marriott Senior Living Services Facilities of             Marriott Senior Living Services, Inc.
         The Jefferson, Arlington, VA

(9)      Marriott Senior Living Services Facilities of             Marriott Continuing Care, LLC
         The Colonnades, Charlottesville, VA                       (Subtenant)

(10)     Marriott Senior Living Services Facilities of             Marriott Senior Living Services, Inc.
         Virginia Beach, Virginia Beach, VA
</TABLE>Exhibit 10.23

                            FIFTH AMENDMENT OF LEASE

         This Fifth Amendment of Lease (this  "Amendment") is made this 4 day of
August, 2000, between SPTMRT Properties Trust, a Maryland real estate investment
trust  ("Landlord"),  and  Marriott  Continuing  Care,  LLC, a Delaware  limited
liability company ("Tenant").

                                    Recitals:

         A.       Whereas,   HMC   Retirement   Properties,   Inc.,  a  Delaware
                  corporation  ("HMC"),  as Landlord and Marriott  Senior Living
                  Services,  Inc.  ("MSLS") as Tenant  entered into that certain
                  Facilities  Lease  Agreement  for the Marriott  Senior  Living
                  Services  Facilities of Church Creek,  Cook County,  Arlington
                  Heights,  Illinois, on October 8, 1993, which Facilities Lease
                  Agreement was amended on January 19, 1994, May 16, 1994,  June
                  30,  1994  and  October  10,  1997  (said   Facilities   Lease
                  Agreement,  as so  amended  hereinafter  referred  to  as  the
                  "Lease"); and

         B.       Whereas,  pursuant to the terms of that certain Assignment and
                  Assumption of Leases,  Guarantees and Permits  between HMC and
                  Church Creek Corporation, a Massachusetts corporation ("Church
                  Creek"),  dated September 7, 1994, Church Creek assumed all of
                  HMC's rights, title and interest in and to the Lease; and

         C.       Whereas,  pursuant to the terms of that certain Assignment and
                  Assumption of Lease between MSLS and Marriott Continuing Care,
                  Inc., a Delaware  Corporation  ("MCC,  Inc.") dated October 7,
                  1998,  MCC,  Inc.  assumed  all of  MSLS'  rights,  title  and
                  interest in and to the Lease; and

         D.       Whereas,  pursuant to the terms of that  certain Bill of Sale,
                  Assignment and Assumption of Leases,  Contracts and Agreements
                  dated  June 30,  1999,  Church  Creek  assigned  the  Lease to
                  Landlord; and

         E.       Whereas,  on April 20, 2000 MCC, Inc.  converted to a Delaware
                  limited liability company ("MCC, LCC"); and

         F.       Whereas  Landlord  and  Tenant  now  wish to  provide  for the
                  amendment of the Lease on the terms and  conditions  set forth
                  herein.

         Now,  therefore,   in  consideration  of  the  mutual  obligations  and
agreements  set forth  below,  the  sufficiency  and receipt of which are hereby
acknowledged, Landlord and Tenant agree as follows:

                  1.       Section 5.03 shall be amended by adding the following
                           new section:

                           "C. Commencing with the third Fiscal Quarter of 2000,
                           Tenant shall,  within forty-five (45) days of the end
                           of each Fiscal Quarter  furnish to Landlord a report,
                           for the immediately preceding Fiscal Quarter and year
                           to date, which shall include the following:

<PAGE>

                           A.       A schedule of revenue by type of unit (i.e.,
                                    assisted living,  special care, and nursing)
                                    and by source  (i.e.,  Medicare  or  private
                                    pay);

                           B.       A schedule  of the  occupancy  and number of
                                    each  type of unit  at the  Premises  (i.e.,
                                    assisted living, special care and nursing);

                           C.       A schedule of operating expenses by category
                                    including real estate taxes; and

                           D.       Such  other   financial   information   that
                                    Landlord may reasonably request from time to
                                    time, provided however, that such additional
                                    financial  information requested by Landlord
                                    must be of the type and nature  that  Tenant
                                    generally  provides  to other  Owners of its
                                    leased senior living  communities.  Attached
                                    hereto as Exhibit A is the form of reporting
                                    that Tenant currently provides to its owners
                                    and will serve as the  initial  form for the
                                    reporting  to  Landlord   pursuant  to  this
                                    Section 5.03(C)."

                  2.       All  capitalized  terms not defined herein shall have
                           the meaning set forth on the Lease; and

                  3.       Any conflict between the terms and conditions of this
                           Amendment and the Lease shall be resolved in favor of
                           this Amendment; and

                  4.       Other than as modified  herein,  all of the terms and
                           provisions  of this Lease shall  remain in full force
                           and effect.

         IN WITNESS  WHEREOF,  Landlord and Tenant have  executed and  delivered
this Amendment on the date first hereinabove set forth.

                                       TENANT

Attest:                                Marriott Continuing Care, LLC
                                       a Delaware limited liability company

By: /s/ W. David Mann                  By: Marriott Senior Living Services, Inc.
    ----------------------------           a Delaware Corporation
    Name:    W. David Mann                 Sole Member
    Title:   Secretary
                                           By: /s/ Bruce L. Robertson
                                               ---------------------------------
                                               Name:    Bruce L. Robertson
                                               Title:   Treasurer

                                        [SEAL]

<PAGE>

                                        LANDLORD

Attest:                                 SPTMRT Properties Trust
                                        a Maryland real estate trust

By: /s/ Jennifer B. Clark               By: /s/ David J. Hegarty
    ----------------------------            ------------------------------------
    Name:                                   Its:     President

                                        [SEAL]

                                        GUARANTOR

Attest:                                      Marriott International, Inc.
                                             a Delaware corporation

By: /s/ Edward L. Bednarz               By: /s/ Myron D. Walker
    ----------------------------            ------------------------------------
    Name:    Edward L. Bednarz              Name:    Myron D. Walker
    Title:   Assistant Secretary            Title:   Vice President

                                        [SEAL]

<PAGE>

                            Schedule to Exhibit 10.23

         Pursuant  to  Instruction  2 to Item  601(a)  of  Regulation  S-K,  the
following  Fifth  Amendment of Lease,  which is  substantially  identical in all
material  respects to the Fifth  Amendment of Lease  concerning  the  Facilities
Lease  Agreement for the Marriott  Senior Living  Services  Facilities of Church
Creek,   Arlington  Heights,  IL,  filed  herewith,  is  omitted.  The  material
difference in the premises leased is as follows:

         Premises

(1)      Marriott Senior Living Services Facilities of
         Calusa Harbour, Ft. Myers, FL

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