Document:

<PAGE>   1
                                                                   Exhibit 10.19

                              ANALOG DEVICES, INC.
                               ONE TECHNOLOGY WAY
                                  P.O. BOX 9106
                        NORWOOD, MASSACHUSETTS 02062-9106

                                           June 21, 2000

Mr. Jerald G. Fishman
President and Chief Executive Officer
Analog Devices, Inc.
One Technology Way
P.O. Box 9106
Norwood, Massachusetts 02062-9106

Dear Jerry:

     At a meeting of the Board of Directors of Analog Devices, Inc., held today,
the Directors authorized and approved an amendment to all of the outstanding
unvested stock options granted to you by the Company, as well as any future
stock options which may be granted to you, providing for the accelerated vesting
of all of your unvested stock options in the event of termination of your
employment by the Company under specified conditions, as set forth below.

     In the event that your employment with the Company is terminated by the
Company without "cause" or is teminated by you for "good reason" (as those terms
are defined in ADDENDUM A attached hereto), all of the then ourstanding unvested
stock options held by you shall accelerate and be and become immediately
exercisable and fully vested at the time of such termination; PROVIDED, HOWEVER,
that if these accelerated vesting provisions shall, in the judgment of the
Company's independent auditors, Ernst & Young LLP, adversely affect the ability
of the Company to treat any future acquisition as a "pooling of interests" for
accounting purposes, then this agreement and the accelerated vesting provisions
shall be and become null and void.

     If you are in agreement with the foregoing, would you please sign the
duplicate copy of this letter and return it to me, whereupon this letter shall
constitute a binding and enforceable agreement between you and the Company in
accordance with its terms.

                                   Very truly yours,

                                   Analog Devices, Inc.

                               By: /s/ Ray Stata
                                   ---------------------------------------------
                                       Ray Stata, Chairman

Read and Agreed

/s/ Jerald G. Fishman
----------------------------
Jerald G. Fishman

<PAGE>   2

                         ADDENDUM A TO LETTER AGREEMENT
                      BETWEEN JERALD G. FISHMAN ("FISHMAN")
                       AND ANALOG DEVICES, INC ("COMPANY")

1.   "CAUSE" means:

     (a)  the willful and continued failure of Fishman to perform substantially
          his duties with the Company or one of its affiliates (other than any
          such failure resulting from his physical or mental disability),

     (b)  Fishman's gross and reckless negligence in the performance of his
          duties which materially adversely affects the Company's business,

     (c)  Fishman's willful engaging in conduct which is materially injurious to
          the Company,

     (d)  Fishman's conviction of a felony, or

     (e)  a material breach of any of Fishman's obligations (i) not to compete
          with the Company or (ii) to maintain the confidentiality of the
          Company's confidential and proprietary information.

     For purposes of this provision, no act or failure to act, on the part of
     Fishman, shall be considered "willful" unless it is done, or omitted to be
     done, by Fishman in bad faith or without reasonable belief that his action
     or omission was in the best interests of the Company. Any act or failure to
     act, based upon authority given pursuant to a resolution duly adopted by
     the Board or upon the instructions of the Board or based upon the advice of
     counsel for the Company shall be conclusively presumed to be done, or
     omitted to be done, by Fishman in good faith and in the best interests of
     the Company. The cessation of Fishman's employment shall not be deemed to
     be for Cause unless and until (i) in the event of any Cause defined in
     paragraphs (a), (b), (c) and (e), a written notice has been delivered to
     Fishman by the Board which specifically identifies the Cause which is the
     Board's basis for termination and Fishman has failed to cure or remedy the
     act or omission so identified within a period of thirty (30) days after the
     Employee's receipt of such notice (unless the act or omission is of a
     nature that it cannot be cured or remedied) and (ii) the Board has
     delivered to Fishman a copy of a resolution duly adopted by the affirmative
     vote of not less than a majority of the entire membership of the Board
     (excluding Fishman if he is then a member of the Board) at a meeting of the
     Board called and held for such purpose (after reasonable notice is provided
     to Fishman and he is given an opportunity, together with counsel, to be
     heard before the Board), finding that, in the good faith opinion of the
     Board, he is guilty of the conduct described in paragraph (a), (b), (c) or
     (e) above, and specifying the particulars thereof in detail.

2.   "Good Reason" means:

     (a)  the assignment to Fishman of any duties inconsistent in any material
          respect with his position as Chief Executive Officer of the Company,
          or any other action by

<PAGE>   3

          the Company which results in a material diminution in his authority,
          duties or responsibilities, excluding for this purpose an isolated,
          insubstantial and inadvertent action not taken in bad faith and which
          is remedied by the Company promptly after receipt of notice thereof
          given by Fishman;

     (b)  any action by the Company to reduce his annual base salary and
          employee benefits below those currently (June 21, 2000) in place,
          other than an isolated, immaterial or inadvertent failure not
          occurring in bad faith and which is remedied by the Company promptly
          after receipt of notice thereof given by Fishman; or

     (c)  the Company's requiring Fishman to be based at any office or location
          other than within a 50-mile radius of its current headquarters in
          Norwood, Massachusetts.

                                     - 3 -<PAGE>

                                                                    EXHIBIT 10.9

January 26, 2000

Integrated Resources High Equity Partners L.P., Series 85,
   A California Limited Partnership
100 Jericho Quadrangle, Suite 214
Jericho, NY  11753-2727
         Attn: Mr. Peter Braverman

RE: Valuation Analysis for Integrated Resources High Equity Partners, Series 85,
A California Limited Partnership ("the Partnership")

Gentlemen:

By letter dated June 14, 2000, as amended by letters dated December 1, 2000 and
January 23, 2001, the Partnership retained Insignia/ESG, Inc. ("Insignia") to
undertake four separate valuation analyses with respect to the Partnership on
behalf of the Partnership. The engagement letter states that the Partnership
proposes to be converted (the "Transaction") into a real estate investment trust
(the "REIT") as described by the Partnership's management in Amendment No.5 to
the Registration Statement on Form S-4 of the REIT. We have assumed that in the
Transaction, each Partnership Unit would be exchanged for three REIT shares. In
each of the analyses, the value arrived at is expressed as an amount per
proposed REIT share. The following summarizes the specific analyses that the
Partnership asked us to perform.

1. An examination of the secondary market trading history ("Secondary Market
Trading History Analysis") of the existing units of limited partnership interest
in the Partnership (the "Partnership Units") on the limited secondary markets;

2. An analysis of the value of the net assets of the Partnership, and the amount
of cash available for distribution to partners, were the Partnership to
liquidate all of its real estate (the "Properties") and other assets
("Liquidation Analysis");

3. An analysis of the value of the Partnership Units, on a going concern basis,
based upon the future cash flow to be received by partners ("Going Concern
Analysis");

<PAGE>

4. On the assumption that the Partnership was converted to the REIT, an analysis
of the expected range in which the REIT shares would trade based upon an
examination of comparable publicly traded real estate investment trusts
("Conversion and Comparable Company Analysis").

In performing these analyses, we reviewed the documents provided to us by the
Partnership which are identified on Schedule A to this letter and we have relied
upon and assumed, without independent verification or investigation, the
accuracy and completeness of all financial and other information provided to or
discussed with us by the Partnership, its general partners and their respective
employees, representatives and affiliates. With respect to forecasts of the
future financial condition and operating results of the Partnership and the
proposed REIT provided to or discussed with us, we assumed, at the direction of
the management of the Partnership, without independent verification or
investigation, that such forecasts were reasonably prepared on bases reflecting
the best currently available information, estimates and good faith judgments of
the management of the Partnership. We have also relied upon assurances of the
management of the Partnership that they are unaware of any facts that would make
the historical information or forecasts incomplete or misleading. Except for the
appraisals provided to us by the Partnership referred to below, we have neither
made nor obtained any independent evaluations or appraisals of the assets or the
liabilities (contingent or otherwise) of the Partnership. The analyses do not
address the tax consequences of any aspect of the proposed Transaction (other
than transfer taxes assumed with the disposition of real estate upon
liquidation). We are not expressing any opinion as to the underlying evaluation,
future performance or long-term viability of the Partnership or the proposed
REIT, or the price at which Partnership Units or proposed REIT shares will
trade, whether or not the Transaction occurs. Our analyses are necessarily based
on the information available to us and general economic, financial and
securities market conditions and circumstances as they exist and can be
evaluated by us on the date hereof. It should be understood that, although
subsequent developments may affect our analyses, we do not have any obligation
to update, revise or reaffirm the analyses.

OVERVIEW OF CUSHMAN AND WAKEFIELD APPRAISAL METHODS

Insignia was provided with Cushman & Wakefield's ("Cushman") appraised values as
of June 30, 2000 for the Properties ("Appraised Values"). The valuation approach
selected by Cushman for the Properties varies based on each Property's
particular demise, encumbrances and the market conditions affecting it. Cushman
employed a discounted cash flow approach with, in most cases, support from the
sales comparison approach.

Under the discounted cash flow approaches, the cash flows for the Properties for
the next 10 years were projected. At the end of the 10th year a terminal value
("Terminal Value") was added to the cash flow by capitalizing the projected 11th
year net operating income at a rate ("Appraised Cap Rate") selected by Cushman
and then deducting the anticipated costs associated with selling the Properties
("Selling Costs"). The cash flows were then

                                       2
<PAGE>

discounted to present utilizing a discount rate ("Appraised Discount Rate")
selected by Cushman.

For the properties held through joint venture interests, Cushman provided a
second set of values ("Discounted J.V. Values") which contemplate a 25% to 30%
discount ("Joint Venture Discounts") to the Appraised Values in consideration of
the illiquidity associated with the ownership structure. The Discounted J.V.
Values together with the Appraised Values for the non-joint venture Properties
together constitute the Adjusted Appraisals ("Adjusted Appraisals").

1. SECONDARY MARKET TRADING HISTORY ANALYSIS

The Secondary Market Trading History Analysis is intended to value the
Partnerships based on the recent trading prices of Partnership Units. These
secondary markets cannot be characterized as either efficient or liquid markets,
and Partnership Units are expected to trade at a discount to liquidation value
or value based upon a going-concern analysis of the Partnership. The information
provided to us by the Partnership included the high sale price and low sale
price per Partnership Unit during each two months of trading from April 1, 1996
to September 30, 2000, together with a weighted average price per Partnership
Unit for the same period. The ranges of values indicated by this analysis are
based upon that secondary market trading data, with particular consideration
given to the weighted average trading prices in August and September, 2000, the
most recent period for which data was provided. Also considered are the trends
in prices over the period for which data was provided. The resulting range of
values per REIT share from the Secondary Market Trading History Analysis is
indicated to be $27.10 to $30.56 per share.

2. LIQUIDATION ANALYSIS

The Liquidation Analysis is intended to value the Partnership's net assets
assuming a complete liquidation of the Partnership on a current basis. For
purposes of this analysis, we assumed that the non-joint venture Properties
would sell at their Appraised Values and that interests in joint ventures would
sell at the values indicated in the Adjusted Appraisals.

The Liquidation Analysis assumes an adjustment for the anticipated property
disposition costs consisting of estimated transfer taxes, brokerage commissions
and closing costs ("Disposition Costs"). To the extent Properties were appraised
based on a discounted cash flow methodology, Disposition Costs were assumed to
be equal to Selling Costs utilized by Cushman in determining Terminal Value.

Consideration was also given for the non-real estate assets of the Partnership.
The net assets considered were the Assets and Liabilities reported on the
Balance Sheet at September 30, 2000 included in the Form 10-Q of the Partnership
for the period ended September 30, 2000 and were included at the value set forth
on the Balance Sheet with the exception of the assets classified as Other Assets
on the Balance Sheets. The only

                                       3
<PAGE>

Other Assets included were those that were deemed to have value upon
liquidation, i.e. furniture, fixtures & equipment and receivables.

The fee giveback obligation was also considered to be realized by the limited
partners of the Partnership at full value as of September 30, 2000.

Finally, consideration was given for the partnership dissolution costs that were
estimated at $500,000 for the Partnership.

No general partner liquidation fees or priority distributions were considered,
as the partnership liquidation values would not provide for same under the terms
of the Partnership Agreement.

The resulting range of values per proposed REIT share based on the Liquidation
Analysis is indicated to be $53.17 to $59.96 per share.

3. GOING-CONCERN ANALYSIS

Insignia was provided with the distribution history of the Partnership. In
addition, pro forma financial statements showing forecasts of Partnership cash
flows, expenses and potential distributions were also provided to us by the
Partnership for the period ending December 31, 2001.

The Going-Concern Analysis is intended to value the Partnership as a going-
concern assuming its current asset base. The most significant component of the
value of the Partnership as a going-concern is the distributions to the
partners, which are assumed to be equal to the cash flow from the Partnership's
real estate assets. For purposes of this analysis, the Properties' cash flows
were attributed values based on the Appraised Values.

An adjustment was made to give effect for the joint venture illiquidity that
would impact the Terminal Values of the joint venture Properties. This
adjustment was made for the joint venture Properties that were valued by Cushman
pursuant to the discounted cash flow methodology, by applying to the Terminal
Value the same Joint Venture Discount utilized by Cushman in determining the
appraised liquidation value and discounting it to the present utilizing the
Appraised Discount Rate.

Consideration was also given for the non-real estate assets of the Partnership.
The net assets considered were the Assets and Liabilities cited on the Balance
Sheet as of September 30, 2000 included in the Form 10-Q of the Partnership for
the period ended September 30, 2000, and were included at the value set forth in
the Balance Sheet with the exception of the assets classified as Other Assets on
the Balance Sheet of the Partnership at September 30, 2000. The only Other
Assets included were those that were deemed to have value upon liquidation, i.e.
furniture fixtures & equipment and receivables.

                                       4
<PAGE>

An adjustment was also made to reflect the going-concern reserve requirements. A
general reserve of $1,000,000 was to be maintained by the Partnership and then
liquidated upon termination of the Partnership. An adjustment was thus made
equal to the cost of maintaining this reserve.

Finally, an adjustment was made for the cost of asset management fees and
administrative costs. The values of these costs were derived by discounting the
anticipated annual cost of these expenses for the life of the Partnership. The
capitalization rates employed were equal to the weighted average Appraised
Discount Rate/Appraised Cap Rate for the Properties.

The resulting range of values per proposed REIT share based on the Going-Concern
Analysis is indicated to be $47.42 to $53.47 per share.

4. CONVERSION AND COMPARABLE COMPANY ANALYSIS

The Conversion and Comparable Company Analysis endeavors to determine the range
of values for the proposed REIT's shares.

The methodology employed in determining the REIT's range of values consisted of
applying the Projected Funds from Operations ("Projected FFO") of the REIT to a
range of multiples (the "FFO Multiples") which are consistent with the FFO
Multiples (based on projected funds from operations for 2001) at which
small-capitalization real estate investment trusts (those with an implied market
capitalization less than $250 million) were trading in the marketplace during
November 2000. Funds from operations were calculated in accordance with the
guidelines set out by the National Association of Real Estate Investment Trusts
("NAREIT"). While no directly comparable companies were identified, by adjusting
the median Projected FFO multiple for small-capitalization real estate
investment trusts a range of reasonable FFO Multiples for the REIT was
established. At your request, we limited the range of FFO Multiples for the REIT
to approximately 10% from the low multiple to the high multiple. The resulting
range of reasonable FFO Multiples for the REIT was determined to be 5.1 to 5.6.

The Projected FFO of the REIT is comprised of two components: (1) Pro-forma FFO
("Pro-Forma FFO") for the assets currently owned ("Current Assets") by the
Partnership and (2) Anticipated FFO ("Anticipated FFO") for assets projected to
be acquired by the REIT in the future ("New Assets").

The Pro-Forma FFO is based on the actual operating results of the Current Assets
for the 12 month period ending September 30, 2000, as adjusted for the
anticipated increase in Asset Management Fees resulting from the higher Adjusted
Appraisals as compared to the 1998 appraised values.

Anticipated FFO is based on the projected operating results of the New Assets,
as decreased by the rise in the asset management fees resulting from the
acquisition of the New Assets. The New Assets are assumed to be acquired in two
ways: (1) by utilizing all

                                       5
<PAGE>

available cash less a reserve equal to 3% of the Adjusted Appraisals to buy New
Assets and (2) by leveraging the Current Assets and the New Assets to a level of
75% with debt which carries an interest rate of 8%. The New Assets are assumed
to generate net operating income equal to 10.5% of their gross purchase price.
The resulting range of values per proposed REIT share based on the Conversion
and Comparable Company Analysis are indicated to be $38.42 to $42.19 per share.

Estimates of value of the proposed REIT shares are not intended and should not
be construed as a prediction of estimates as to the trading price of the
proposed REIT shares upon or after consummation of the Transaction.

The information set forth in this letter does not constitute and should not be
construed as a recommendation to any holder of Partnership Units with respect to
the proposed Transaction. The analyses do not address the merits of the proposed
Transaction or consider any alternatives to the proposed Transaction. This
letter has been prepared for the Partnership, and should not be reproduced,
summarized, described or referred to without the prior written consent of
Insignia; provided, however, that this letter may be summarized and reproduced
in full in the Registration Statement on Form S-4 to be filed by the
Partnership.

                                       Insignia/ESG, Inc.

                                       By:  /s/ Kevin F. Haggerty
                                            ----------------------

                                       Title: Executive Managing Director

                                       Name: Kevin F. Haggerty

                                       6

<PAGE>

                                   SCHEDULE A

             LIST OF PARTNERSHIP-PROVIDED INFORMATION AND MATERIALS

--------------------------------------------------------------------------------
ITEM                                   DESCRIPTION
--------------------------------------------------------------------------------
Appraisals                             Narrative appraisals of each of the
                                       Partnership's properties prepared by
                                       Cushman & Wakefield as of June30, 2000
--------------------------------------------------------------------------------
Forms 10-K                             Form 10-K for the Partnership for the
                                       year ended December 31, 1999
--------------------------------------------------------------------------------
Forms 10-Q                             Form 10-Q for the Partnership for the
                                       quarter ended September 30, 2000
--------------------------------------------------------------------------------
Capital Plans                          Descriptions of the anticipated capital
                                       improvements requirements at of the
                                       Partnership's properties for the next 5
                                       years
--------------------------------------------------------------------------------
Asset Management Fees                  The Partnership's and the proposed REIT's
                                       anticipated asset management fees based
                                       on the Appraised Values
--------------------------------------------------------------------------------
Administrative Expenses                The Partnership's and the proposed REIT's
                                       anticipated Administrative Costs based on
                                       historical costs and management's
                                       estimation of future costs assuming a 3%
                                       inflationary factor
--------------------------------------------------------------------------------
Pro-Forma FFO                          A projection of the Partnership's and the
                                       REIT's funds from operations based on the
                                       assets currently owned by the
                                       Partnership.
--------------------------------------------------------------------------------
Anticipated FFO                        A projection of the increase in the
                                       REIT's funds from operations based on the
                                       acquisition of New Assets assuming 75%
                                       leverage of the Partnership's Current
                                       Assets and New Assets, and use of
                                       approximately 80% of the Partnership's
                                       current cash reserves for the acquisition
                                       of New Assets. Leverage was assumed to be
                                       75% and bear interest at an average rate
                                       of 8%, and New Assets were assumed to
                                       generate net operating income of 10.5% of
                                       their gross cost. Asset Management Fees
                                       were assumed to be based upon 1.25% of
--------------------------------------------------------------------------------

                                       7
<PAGE>

--------------------------------------------------------------------------------
                                       the prospective value of the New Assets.
--------------------------------------------------------------------------------
Excess Cash Distribution               Excess cash distribution equals cash on
                                       hand at September 30, 2000 less projected
                                       capital improvements and reserves.
--------------------------------------------------------------------------------
Projected FFO                          The total FFO assumed to be generated by
                                       the proposed REIT in the future.
                                       Calculated by adding the Pro-Forma FFO
                                       and Anticipated FFO.
--------------------------------------------------------------------------------
Going-Concern Reserve Requirements     An estimate of the cost of the
                                       maintenance and use of the cash reserves
                                       projected for the Partnership assuming
                                       the proposed REIT conversion does not
                                       occur.
--------------------------------------------------------------------------------
Form S-4                               Amendment No. 5 to the Registration
                                       Statement on Form S-4 filed by the REIT
                                       in January 2001.
--------------------------------------------------------------------------------
Pro-Forma Partnership
Income Statements                      Pro-forma stabilized income statements
                                       for the Partnership assuming the proposed
                                       REIT conversion does not occur. These
                                       statements reflect operations for the
                                       twelve month period ended September 30,
                                       2000 as adjusted for major known changes
                                       in property operations, changes in the
                                       Asset Management Fees based on the
                                       increased Appraised Going- Concern
                                       Values, and increased administrative
                                       costs assuming an inflationary factor
                                       of 3%.
--------------------------------------------------------------------------------
Secondary Market Trading History       Chart of number and prices of Partnership
                                       Units sold from April 1, 1996 through
                                       September 30, 2000 as reported by
                                       Partnership Spectrum.
--------------------------------------------------------------------------------
Fee Giveback Obligations               The General Partner's current fee
                                       giveback obligations stipulated in The
                                       Class Action Settlements, as defined in
                                       the Form S-4.
--------------------------------------------------------------------------------
Going Concern Distributions            Estimates of the distributions by the
                                       Partnership if the Partnership were to be
                                       a going concern.
--------------------------------------------------------------------------------
Partnership Dissolution Costs          Estimates of the Partnership-level costs
                                       associated with the dissolution and
                                       winding up of the affairs of the
                                       Partnership.
--------------------------------------------------------------------------------

                                        8

Source: [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00019-of-00352.parquet"}, [{"source": "alea-institute/alea-institute/kl3m-data-edgar-agreements/train-00019-of-00352.parquet"}]]