HEALTH & RETIREMENT PROPERTIES TRUST
8-K, 1997-10-16
REAL ESTATE INVESTMENT TRUSTS
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    ---------



                                    FORM 8-K




                                 CURRENT REPORT
                     PURSUANT TO SECTION 13 OR 15(d) OF THE
                         SECURITIES EXCHANGE ACT OF 1934





        Date of Report (Date of earliest event reported): October 1, 1997





                     HEALTH AND RETIREMENT PROPERTIES TRUST
               (Exact name of registrant as specified in charter)




    Maryland                     1-9317                   04-6558834
 (State or other            (Commission file            (IRS employer
 jurisdiction of                number)              identification no.)
 incorporation)


  400 Centre Street, Newton, Massachusetts                     02158
  (Address of principal executive offices)                   (Zip code)


Registrant's telephone number, including area code:  617-332-3990


<PAGE>



Item 2.  Acquisition or Disposition of Assets

         As  previously  announced,  on October 1, 1997,  Health and  Retirement
Properties  Trust and  subsidiaries  (the "Company")  purchased a 420,368 square
foot office  building  located at 7 West 34th Street in New York City,  New York
from 7 West  Associates  LLC, a wholly owned  subsidiary of Orchard  Properties,
Inc., for $110 million.  The building has been and will continue to be rented as
commercial office space. The building is currently 100% occupied with 60% leased
to  health  care  companies,  including  the  corporate  headquarters  of Health
Insurance Plan of Greater New York.

         As  previously  announced,  on May 15, 1997,  the Company  acquired two
medical  office  buildings  and two garages  located  adjacent  to  Cedars-Sinai
Medical Center in Los Angeles,  California.  The  properties  were acquired by a
limited partnership owned 99% by the Company. The Company contributed and loaned
an aggregate of $108.5  million to such limited  partnership  and Medical Office
Buildings,  Ltd.,  a  Washington  limited  partnership,  the  Company's  limited
partner,  contributed  the  land  and  the  buildings  which  it  acquired  from
Wright-Carlyle  Partners, in the case of the buildings, and Prudential Insurance
Company of America,  in the case of the land,  pursuant  to  existing  rights of
first  refusal and options,  the exercises of which were funded by the Company's
funding of the limited  partnership.  The two medical  office towers and the two
parking garages are interconnected to each other and to the Cedars-Sinai Medical
Center by pedestrian  bridges.  The medical office  buildings are currently more
than 95% occupied and have over 150 separate medical  practices as tenants.  The
average  occupancy of these  buildings for the last ten years was  approximately
97.2%.  The Company  currently  intends  that the building  will  continue to be
operated as a medical office building.

         The  properties  described  above are  managed  for the  Company by M&P
Partners  Limited  Partnership  ("M&P"),   which  provides  property  agent  and
management services for certain of the Company's multi-tenant buildings.  M&P is
owned by its general partner,  HRPT Advisors,  Inc., the Company's advisor,  and
Messrs.  Gerar M. Martin and Barry M. Portnoy,  who are managing trustees of the
Company.  Management  fees paid to M&P are  based on a  percentage  of  revenues
derived from the multi-tenant buildings under its management.

         The consideration  for each of these  acquisitions was funded initially
by drawings under the Company's  existing revolving line of credit with Dresdner
Kleinwort  Benson  NorthAmerica  LLC,  as agent  and  Fleet  National  Bank,  as
administrative agent and available cash.

Item 7.  Financial Statements, Pro Forma Financial Information
         and Exhibits.

(a)      Financial Statements of Business Acquired.

         The audited financial  statements of the properties described in Item 2
of this Report are not filed  herewith but will be filed on an amendment to this
Form 8-K within 60 days of the date hereof.

(c)      Exhibits.

         2.1      Purchase and Sale  Agreement  dated  September 25, 1997 by and
                  between 7 West Associates  LLC, as seller and the Company,  as
                  purchaser.

         2.2      Contribution  Agreement (and Escrow Instructions) with respect
                  to the acquisition of the  Cedars-Sinai  Medical Office Towers
                  dated as of  April  20,  1997 by and  between  Medical  Office
                  Buildings, Ltd., as seller, and the Company, as buyer.


<PAGE>


                                   SIGNATURES

         Pursuant to the  requirements  of the Securities  Exchange Act of 1934,
the  registrant  has duly  caused  this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                    HEALTH AND RETIREMENT PROPERTIES TRUST



                                    By: /s/ Ajay Saini
                                         Ajay Saini, Treasurer and
                                             Chief Financial Officer

Date: October 16, 1997



                                                                     Exhibit 2.1







                           Purchase And Sale Agreement


                               7 West 34th Street
                               New York, New York

                                     between

                        7 West Associates LLC, as Seller


                                       and


              Health and Retirement Properties Trust, as Purchaser

                            Dated: September 25, 1997







<PAGE>


<TABLE>
<CAPTION>
                           Purchase And Sale Agreement

                                Table of Contents

                                                                                                      Page

<S>              <C>                                                                                   <C>
Article 1             Definitions........................................................................1
    Section 1.1  Definitions.............................................................................1

Article 2             Purchase and Sale..................................................................5
    Section 2.1  Purchase and Sale.......................................................................5
    Section 2.2  Payment of the Purchase Price...........................................................5

Article 3             Purchaser's Review.................................................................6
    Section 3.1  Property Documents......................................................................6
    Section 3.2  Physical Review.........................................................................6
    Section 3.3  Indemnity and Survival..................................................................8

Article 4             Title Documents....................................................................8
    Section 4.1  Title Commitment and Survey.............................................................8
    Section 4.2  Title Defects...........................................................................8

Article 5             Representations, Warranties, and Covenants........................................11
    Section 5.1  Seller's Representations and Warranties................................................11
    Section 5.2  Survival of Seller's Representations and Warranties....................................17
    Section 5.3  Purchaser's Representations, Warranties and Covenants..................................18
    Section 5.4  Seller's Covenants.....................................................................19
    Section 5.5  As Is..................................................................................22

Article 6             Closing...........................................................................23
    Section 6.1  Conditions to Purchaser's Obligations to Close.........................................23
    Section 6.2  Conditions to Seller's Obligations to Close............................................24
    Section 6.3  Escrow and Closing.....................................................................25
    Section 6.4  Prorations.............................................................................30
    Section 6.5  Closing Costs..........................................................................37
    Section 6.6  Closing Deliveries.....................................................................38
    Section 6.7  Access to Records......................................................................42
    Section 6.8  Survival...............................................................................43

Article 7             Brokerage.........................................................................43

Article 8             Casualty and Condemnation.........................................................44
    Section 8.1       ..................................................................................44
    Section 8.2       ..................................................................................44
    Section 8.3       ..................................................................................44




                                        i

<PAGE>






                                                                                                      Page

    Section 8.4       ..................................................................................45

Article 9             Defaults..........................................................................47
    Section 9.1  Purchaser's Default....................................................................47
    Section 9.2  Seller's Default.......................................................................47
    Section 9.3  Delivery of Earnest Money Deposit in the Event of a Default............................48

Article 10            Miscellaneous.....................................................................48
    Section 10.1  Indemnification.......................................................................48
    Section 10.2  Assurances Of Cooperation.............................................................49
    Section 10.3  Successors And Assigns................................................................49
    Section 10.4  Interpretation........................................................................50
    Section 10.5  Joint Cooperation.....................................................................52
    Section 10.6  Publicity.............................................................................52
    Section 10.7  Notices...............................................................................53
    Section 10.8  Exculpations..........................................................................54
    Section 10.10  Counterparts.........................................................................55

    Exhibit A         The Land
    Exhibit B         The Permitted Title Exceptions
    Exhibit C         The Contracts
    Exhibit D         The Rent Roll
    Exhibit E         The Personal Property
    Exhibit F-1       The Bill of Sale
    Exhibit F-2       The Assignment of Contracts, Intangible Property Licenses and
                      Utility Deposits
    Exhibit F-3       The Assignment of Leases
    Exhibit F-4       The Bargain and Sale Deed
    Exhibit G         The Claims
    Exhibit H         The Property Documents
    Exhibit I         Schedule of Insurance
    Exhibit J         Form of Tenant's Estoppel Letter
    Exhibit K         Intentionally Omitted
    Exhibit L         Licenses
    Exhibit M         Certificate of Occupancy
    Exhibit N         Intentionally Omitted
    Exhibit O         Pending Real Estate Tax Appeals
    Exhibit P         Intentionally Omitted
    Exhibit Q         Intentionally Omitted
    Exhibit R         Letters of Credit
    Exhibit S         Supplies
    Exhibit T         Brokerage Agreements
</TABLE>




                                       ii

<PAGE>







                  THIS PURCHASE AND SALE AGREEMENT is made as of the 25th day of
September,  1997,  by and  between 7 WEST  ASSOCIATES  LLC, a  Delaware  limited
liability  company  ("Seller")  and HEALTH AND  RETIREMENT  PROPERTIES  TRUST, a
Maryland real estate investment trust ("Purchaser").

                  In  consideration  of the  respective  agreements,  covenants,
representations,  warranties and conditions contained in this Agreement, and for
other good and valuable consideration, the parties hereto agree as follows:

                                    Article 1
                                   Definitions

                  Section 1.1 Definitions.  As used herein,  the following terms
shall have the following meanings:

Additional Rents:          As defined in Section 6.4.1 of this Agreement.

Adjustment Point:          As defined in Section 6.4 of this Agreement.

Agreement:                 This Agreement,  including all exhibits and schedules
                           hereto,  all of  which  are  incorporated  into  this
                           Agreement by this reference.

BID:                       As defined in Section 5.1.2.8 of this Agreement.

Claims:                    As defined in Section 5.1.2.1 of this Agreement.

Closing:                   As defined in Section 6.3.8 of this Agreement.

Closing Date:              October  1,  1997,  as  such  date  may  be  extended
                           pursuant to the terms of this  Agreement or by mutual
                           consent of the parties hereto.

Closing Statement:         As defined in Section 6.4 of this Agreement.






<PAGE>


                                                                               2




Contracts:                 All written contracts and agreements affecting all or
                           any portion of the  Property  to which  Seller or any
                           predecessor   in   interest  to  Seller  is  a  party
                           (including   without   limitation,   all   agreements
                           relating to the management,  servicing or maintenance
                           of the Real  Property or the Personal  Property,  and
                           all   agreements   for  the  purchase  of  materials,
                           supplies,  equipment  or  parts,  but  excluding  the
                           Leases and any  documents  evidencing  the  Permitted
                           Title  Exceptions).  The Contracts are  identified on
                           Exhibit C.

Curable Liens:             As defined in Section 4.2.2(a) of this Agreement.

Cure Amount:               As defined in Section 4.2.2(a) of this Agreement.

Earnest Money Deposit:     Five Million Dollars ($5,000,000).  The term "Earnest
                           Money Deposit" shall also include any interest earned
                           on the deposited monies.

Escrow Agent:              Paul, Weiss, Rifkind, Wharton & Garrison.

Existing Mortgage:         That certain first mortgage on the Real Property held
                           by Credit Lyonnais.

Governmental
Authority:                 The United States of America,  or any state,  county,
                           municipality,  or other unit of local government,  or
                           any agency,  board, or other public entity  empowered
                           or  constituted  by any of them having,  jurisdiction
                           over the Real Property,  the Property or its or their
                           use or ownership.

HIP:                       As defined in Section 5.1.1.5 of this Agreement.

Improvements:              All  buildings,   structures,   fixtures,  and  other
                           improvements  of every  kind  located on or under the
                           Land,   including   any   and   all   plumbing,   air
                           conditioning,   heating,   ventilating,   mechanical,
                           electrical  and other utility  systems  servicing the
                           building, security devices, signs and light fixtures,
                           but not including  publicly owned or privately  owned
                           (unless  owned by Seller)  utility lines or equipment
                           or  tenant  fixtures  which  under  the  terms of any
                           Tenant's  Lease or as a matter of law may be  removed
                           from  the  demised  premises  by such  Tenant  on the
                           expiration of its term.


<PAGE>

                                                                               3


Intangible Property:       All intangible property excluding  Contracts,  Leases
                           and Licenses  which  pertain to the Real  Property or
                           Personal  Property,  including all of Seller's rights
                           in  and  to   guarantees,   warranties,   plans   and
                           specifications and reports pertaining to the Property
                           (or any portion thereof), if any.

Land:                      That certain parcel of land described on Exhibit A.

Leases:                    All leases and other  agreements for the occupancy of
                           any  portion  of  the  Improvements,   including  any
                           amendments and modifications  thereof,  each of which
                           is identified on Exhibit D.

Legal Requirements:        All laws,  statutes,  regulations and requirements of
                           any Governmental  Authority having  jurisdiction over
                           the Real Property or the Property.

Licenses:                  All  licenses,  permits,  certificates  of occupancy,
                           authorizations  or  other  approvals  issued  by  any
                           Governmental  Authority  regarding  operation  of the
                           Real Property or Personal  Property but not including
                           those required for completed  tenant  improvements or
                           work which any Tenant is performing and those related
                           to any Tenant's business or issued to any Tenants.

Major Tenant:              Each  of the  Tenants  listed  on  Exhibit  P to this
                           Agreement.

Material Part:             As defined in Section 8.3 of this Agreement.

Member:                    As defined in Section 5.1.1.1 of this Agreement.

New Leases:                As defined in Section 5.4.2.4 of this Agreement.

Owner's Policy:            As defined in Section 4.1 of this Agreement.

Permitted Title
Exceptions:                Those matters listed on Exhibit B to this Agreement.

Personal Property:         The items of property identified on Exhibit E to this
                           Agreement.

Property:                  The Real Property, the Leases, the Personal Property,
                           the  Licenses,   the  Contracts  and  the  Intangible
                           Property.


<PAGE>

                                                                               4


Property Documents:        As defined in Section 3.1 of this Agreement.

Prorations:                As defined in Section 6.4 of this Agreement.

Purchase Price:            One Hundred Ten Million Dollars ($110,000,000).

Purchaser:                 As defined in the Introduction to this Agreement.

Purchaser's Broker:        Williams Real Estate Co.

Real Property:             The Land and the Improvements.

Rent Roll:                 The rent roll  attached to this  Agreement as Exhibit
                           D.

Rents:                     As defined in Section 6.4.1 of this Agreement.

Seller:                    As defined in the Introduction to this Agreement.

Seller's Broker:           CB Commercial Real Estate Group, Inc.

Seller's Closing 
Documents:                 As defined in Section 6.6.1 of this Agreement.

Studies:                   As defined in Section 3.2.2 of this Agreement.

Survey:                    As defined in Section 4.1 of this Agreement.

Tenant:                    A  party  in   possession   of  a   portion   of  the
                           Improvements pursuant to one of the Leases.

Title Commitment:          As defined in Section 4.1 hereof.

Title Defect:              A  lien,  claim,  charge,  right,  interest,  burden,
                           encumbrance, defect, objection, exception or security
                           interest  which is asserted  against or which burdens
                           the Real Property, or the Personal Property which has
                           a materially  adverse  effect on the use or operation
                           of the Property or the value thereof and which is not
                           identified  in this  Agreement  as a Permitted  Title
                           Exception.

Title Insurer:             Lawyers Title Insurance Corporation.







<PAGE>


                                                                               5




                                    Article 2
                                Purchase and Sale

                  Section  2.1  Purchase  and  Sale.  Subject  to the  terms and
conditions  contained  in this  Agreement,  Purchaser  agrees  to  purchase  the
Property  from  Seller  and Seller  agrees to sell the  Property  to  Purchaser,
subject only to the Permitted Title Exceptions.

                  Section 2.2 Payment of the Purchase Price. Purchaser agrees to
pay the Purchase  Price to Seller,  and Seller  agrees to accept  payment of the
Purchase Price in the following manner:

                           2.2.1 Prior to the  execution  of this  Agreement,  a
portion of the Earnest Money Deposit, equal to $1,100,000 in cash, was delivered
by Purchaser to Escrow  Agent.  Concurrently  with the execution and delivery of
this  Agreement,  the balance of the Earnest Money Deposit shall be delivered to
Escrow Agent in immediately available funds.

                           2.2.2 On the Closing Date,  (a)  Purchaser  shall pay
the balance of the Purchase  Price,  consisting  of the sum of  $105,000,000  to
Seller or as directed by Seller, by wire transfer of immediately available funds
to  Seller's  account  at Morgan  Guaranty  Trust  Company  of New York or other
financial institution designated by Seller, plus or minus net Prorations and (b)
the  Earnest  Money  Deposit,  with the  interest  earned  thereon  credited  to
Purchaser.




    
<PAGE>


                                                                               6




                                    Article 3
                               Purchaser's Review

                  Section 3.1 Property  Documents.  At any  reasonable  time and
from time to time from the date of the execution and delivery of this Agreement,
until the Closing Date,  Seller will permit Purchaser and its authorized  agents
to examine and copy the  instruments  and documents  listed on Exhibit H, to the
extent in Seller's  Possession  or  otherwise  readily  available to Seller (the
"Property  Documents").  Such  inspection  shall  take  place at the  offices of
Seller, as Seller shall otherwise direct or at Purchaser's  request and expense,
Seller shall provide Purchaser with copies of such documents.

                  Section  3.2  Physical  Review.  At  all  times  prior  to the
Closing, Purchaser, its representatives or agents, shall have the right to enter
upon the Real Property. The Purchaser's right to inspect the Real Property shall
be subject to the following:

                           3.2.1   Purchaser  may  examine  and  test  the  Real
Property,  which tests may include non-invasive soil tests,  environmental tests
and engineering  tests.  Purchaser may conduct  invasive  testing which will not
cause  material  damage to the Property  provided it obtains  prior consent from
Seller, which consent Seller agrees shall not be unreasonably withheld,  delayed
or conditioned; and

                           3.2.2  Purchaser  may  inspect  the  Improvements  to
evaluate their  suitability  for  Purchaser's  needs;  provided,  however,  that
examination  of the  interior  of space  leased to  Tenants  may be  limited  as
provided in such Tenants' Leases.






<PAGE>


                                                                               7




                  All of  the  examinations,  inspections,  studies,  tests  and
reports  conducted  or prepared  pursuant  to Sections  3.2.1 and 3.2.2 prior to
Closing are referred to in this Agreement as the "Studies."

                           3.2.3  Purchaser's  right  to  enter  onto  the  Real
Property to conduct the Studies is subject to the following conditions:

                                    3.2.3.1  Purchaser shall provide Seller with
         reasonable  advance  notice  of any entry on the Real  Property  (which
         notice  may  be  oral),  and  Seller  may,  at  its  election,  have  a
         representative present during any such entry;

                                    3.2.3.2   All   investigations   and   other
         activities conducted by Purchaser shall be at Purchaser's sole cost and
         expense,  and Purchaser  shall keep the Real Property free of any liens
         which may be asserted  against  Seller or the Real Property as a result
         of these activities;

                                    3.2.3.3  Purchaser  shall  exercise due care
         with respect to the Real Property in connection  with its entry thereon
         so as to  minimize  any  damage  caused  to the Real  Property  and any
         interference with Seller's use thereof.  Promptly following any test or
         other examination which results in any alteration of the Real Property,
         Purchaser will promptly  restore the Real Property at Purchaser's  sole
         cost and expense to the  condition  which existed prior to such test or
         examination; and

                                    3.2.3.4  Purchaser  or its  agents  will not
         contact  any  Tenants  directly  or  indirectly  prior to the  Closing,
         without Seller's consent.






<PAGE>


                                                                               8



                  Section 3.3 Indemnity and Survival. Purchaser hereby agrees to
indemnify, defend, protect and hold Seller harmless from any and all costs, loss
and damages, including reasonable attorneys' fees and litigation expenses, which
Seller  shall  incur as a result of the  Studies  or any  breach of  Purchaser's
obligations  under  Sections  3.1  and  3.2.  In the  event  this  Agreement  is
terminated,  this indemnity shall survive the termination of this Agreement.  If
this  Agreement  is not  terminated,  this  indemnification  shall  survive  the
Closing.

                                    Article 4
                                 Title Documents

                  Section  4.1  Title  Commitment  and  Survey.   Purchaser  has
obtained (a) an updated  survey of the Real  Property  (the  "Survey") and (b) a
report on title (the "Title  Commitment")  from the Title Insurer for an owner's
policy of title  insurance (the "Owner's  Policy") in the amount of the Purchase
Price,  and has  caused  copies of the  Survey  and the Title  Commitment  to be
delivered to Seller's counsel,  together with  specification of those exceptions
to title  contained  in the Title  Commitment  and/or  Survey  which (a) are not
Permitted Title Exceptions and (b) are not acceptable to Purchaser.

                  Section 4.2 Title Defects.

                           4.2.1 If Seller  shall  elect  (or shall be  required
under  Section  4.2.2  below) to attempt to remove any defect in or objection to
title so specified  by  Purchaser,  then Seller shall be entitled,  on notice to
Purchaser given on or prior to the Closing Date, to adjourn the Closing Date one
or more times,  for a period not to






<PAGE>


                                                                               9



exceed sixty (60) days in the aggregate, to enable Seller to take such action as
may be  required  to cause the Title  Insurer  to issue  the  Owner's  Policy in
accordance with the provisions of this Agreement. If Seller does not so elect to
adjourn the Closing,  or if at the  adjourned  date(s) the Title  Insurer is not
prepared to issue the Owner's  Policy in accordance  with the provisions of this
Agreement,  Purchaser may terminate  this Agreement by written notice to Seller,
whereupon  the Escrow Agent shall return the Earnest  Money Deposit to Purchaser
and neither party shall have any further obligations under this Agreement except
for those provisions which specifically survive the termination hereof.

                           4.2.2 (a) If Seller  elects to adjourn the Closing as
provided above,  this Agreement shall remain in effect for the period or periods
of adjournment in accordance with its terms. In no event, however,  shall Seller
be required to take or bring any action or proceeding or take any other steps to
remove  any  defect in or  objection  to title;  provided,  however,  that if an
examination  of  title   indicates  the  existence  of  one  or  more  liens  or
encumbrances which, in either case, are in liquidated amounts and can be removed
or  discharged  by payment of a sum of money  ("Curable  Liens") which is not in
excess of Five Hundred  Thousand  Dollars  ($500,000) (the "Cure Amount") in the
aggregate,  and if such removal or discharge  can  reasonably  be expected to be
accomplished  prior to the Closing  Date  initially  provided for in Section 1.1
hereof or within a period of sixty (60) days thereafter or such longer period of
time as  Purchaser  may  approve,  Seller  agrees  to  take  such  action  as is
reasonably  required in order to remove or discharge  such Curable Liens and, if
required, to





<PAGE>


                                                                              10



adjourn the Closing Date for the period  required for such purpose.  Seller will
be deemed to have  satisfied  the  foregoing  requirement  with  respect  to any
Curable Liens,  other than as to Curable Liens which are, in the  aggregate,  in
excess of One Million Dollars  ($1,000,000),  if the Title Insurer will issue or
bind itself to issue the  Owner's  Policy  without  additional  premium  (unless
Seller  shall  pay  such  premium)  which  will  (i)  insure  Purchaser  against
collection  of such  Curable  Liens  or  enforcement  thereof  against  the Real
Property and (ii) agree to issue a title commitment to any subsequent  mortgagee
or purchaser of the Property from Purchaser,  which  commitment will insure such
mortgagee or purchaser  against  collection of such Curable Liens or enforcement
against the Real Property.

                           (b) Seller will, in addition,  without  limitation as
to the amount  thereof,  cause to be removed at or prior to the  Closing (i) all
mortgages, assignments of leases and rents and financing statements entered into
by Seller or its  predecessors  in title  whether  created prior to or after the
date hereof, (ii) judgments or tax liens (other than real estate tax liens which
are addressed in Section  6.4.1)  incurred by Seller which are liens against the
Real Property and (iii) other title  exceptions  which are not  Permitted  Title
Exceptions  and which  are  willfully  caused by Seller  from and after the date
hereof.

                           4.2.3  Notwithstanding  the provisions of Section 4.2
hereof,  Purchaser  may at any  time  accept  such  title as  Seller  is able to
deliver,  without  reduction of the Purchase Price or any credit or allowance on
account thereof or any claims against Seller.






<PAGE>


                                                                              11




                                    Article 5
                   Representations, Warranties, and Covenants

                  Section 5.1 Seller's Representations and Warranties.  In order
to induce Purchaser to enter into this Agreement, Seller represents and warrants
to Purchaser as follows:

                           5.1.1 As to Organization, Power, Authority and Title.

                                    5.1.1.1   Seller  is  a  limited   liability
         company duly organized, validly existing and in good standing under the
         laws  of  the  State  of  Delaware.  Seller's  only  member  is  Orchid
         Properties, Inc. (the "Member").

                                    5.1.1.2  Seller  has full  right,  power and
         authority  to  enter  into  and  perform  its  obligations  under  this
         Agreement and the other instruments and documents  contemplated  herein
         to be executed and performed by it, including without limitation, those
         conveying  the Property.  The execution and delivery of this  Agreement
         and such other  instruments  and documents and the  consummation of the
         transactions  contemplated  hereby  and  thereby  (l)  have  been  duly
         authorized by all necessary action on the part of the Seller (2) do not
         require  any  consent  or  approval  of or notice  to any  Governmental
         Authority,  and (3)  will  not  result  in the  breach  of the  limited
         liability  company  agreement  of  Seller  or any  agreement  or  other
         instrument to which Seller or the Member is a party or to which Seller,
         the  Member  or  the  Property  is  bound.   Further,   this  Agreement
         constitutes the valid and binding obligation of Seller.






<PAGE>


                                                                              12




                                    5.1.1.3  Seller  has not made an  assignment
         for the  benefit  of  creditors,  nor has  Seller  filed,  or had filed
         against it, any petition in bankruptcy or insolvency.

                                    5.1.1.4  Seller  is a  "non-foreign  person"
         within  the  meaning  of section  1445 of the  United  States  Internal
         Revenue  Code  of  1986,  as  amended,   and  the  regulations   issued
         thereunder.

                                    5.1.1.5  Seller  is the  sole  owner  of the
         Property and has full right, power and authority to sell and convey the
         same to Purchaser.  No third party other than Health  Insurance Plan of
         Greater  New York  ("HIP") has any  contract,  option or right of first
         refusal with respect to the Property;  HIP's right of first refusal has
         been waived in writing by HIP.

                           5.1.2 As to the Property.

                                    5.1.2.1  There is no  litigation,  action or
         proceeding  pending,  or  to  Seller's  knowledge,  threatened  against
         Seller, the Property, or any part thereof, before any court, arbitrator
         or Governmental Authority nor has Seller received written notice of any
         litigation,   action  or  proceeding  threatened  against  Seller,  the
         Property,  or any part thereof  (the  "Claims")  other than  negligence
         claims fully  covered by  insurance  maintained  by Seller,  and as set
         forth in Exhibit G attached hereto.

                                    5.1.2.2  Exhibit I is a complete list of all
         insurance  policies  applicable  to the  Real  Property  as of the date
         hereof and each such 





<PAGE>


                                                                              13




         policy is  presently in full force and effect.  All the premiums  under
         the insurance policies set forth on Exhibit I have been paid in full.

                                    5.1.2.3  Seller has no  knowledge of and has
         not received any written  notice from any  Governmental  Authority with
         respect to any actual or  threatened  taking of any portion of the Real
         Property  by the  exercise  of the  right of  condemnation  or  eminent
         domain.

                                    5.1.2.4 Seller has one employee.

                                    5.1.2.5  Except as set forth in  Exhibit  C,
         there are no Contracts  relating to the Property which would be binding
         on the  Purchaser  subsequent  to the Closing.  Exhibit C is a complete
         list of all such  Contracts,  such  Contracts are all in full force and
         effect and have not been  amended or  modified,  except as disclosed in
         Exhibit C. Seller is not in default  under any such Contract and to the
         best of Seller's knowledge, no other party is in default under any such
         Contract.

                                    5.1.2.6 There are no proceedings  pending to
         reduce the assessment of the Real Property for real estate tax purposes
         except for the 1992/93,  1993/94,  1994/95, 1995/96 1996/97 and 1997/98
         New York City Fiscal Years,  copies of the  applications  for which are
         attached hereto as Exhibit O.

                                    5.1.2.7  There  are no  outstanding  special
         assessments with respect to the Real Property.






<PAGE>


                                                                              14




                                    5.1.2.8 The Real  Property is located in the
         34th Street Business Improvement District ("BID").

                                    5.1.2.9  The  Real  Property  has  not  been
         designated a New York City Landmark.

                                    5.1.2.10  The Real  Property  constitutes  a
         separate tax lot.

                                    5.1.2.11  Seller  has  not  transferred  any
         development rights with respect to the Real Property.

                                    5.1.2.12  Seller has received no notice that
         the Real  Property  is in  violation  in any  material  respect  of any
         material federal,  state,  municipal and other  governmental  statutes,
         ordinances,   rules,  regulations  or  any  other  legal  requirements,
         including,   without   limitation,   those  relating  to  construction,
         occupancy,  zoning,  adequacy  of  parking,  environmental  protection,
         occupational health and safety and fire safety applicable thereto;  and
         to  Seller's  knowledge  there are  presently  in effect  all  material
         licenses,  permits and other  authorizations  necessary for the current
         use, occupancy and operation thereof.

                                    5.1.2.13 Except as disclosed to Purchaser or
         as described in any  environmental  report  delivered to Purchaser,  to
         Seller's  knowledge,  no material adverse  environmental  conditions or
         hazards exist with respect to the Real Property.

                           5.1.3 As to Leases, Licenses, Etc.

                                    5.1.3.1  (1) There are no  occupancy  rights
         (written or oral),  leases or tenancies  presently  affecting  the Real
         Property or the Personal Property other than the Leases; (2) Seller has
         heretofore  delivered to Purchaser 





<PAGE>


                                                                              15




         a true  and  complete  copy  of  each  of  the  Leases,  including  all
         amendments  thereto;  each such Lease represents the complete agreement
         between Seller and the respective Tenant as to all rights,  liabilities
         and  obligations  of  Seller  and said  Tenant  in and to the  premises
         demised  thereunder;  and the Leases have not been modified or amended,
         except as set forth on  Exhibit D hereto;  (3) the  Leases  are in full
         force and effect; (4) to the best of Seller's  knowledge,  said Tenants
         have not  assigned  their rights under the Leases or sublet any portion
         of their  respective  premises  except as noted on  Exhibit D; (5) said
         Tenants have not been granted any renewal or extension  options  except
         as disclosed  in the Leases,  nor do any of said Tenants have an option
         to purchase the Real Property or any part thereof (other than the first
         refusal right in favor of HIP described in Section 5.1.1.5 hereof); (6)
         except as otherwise  described on Exhibit D, Seller has  performed  its
         obligations under the Leases in all material  respects;  and Seller has
         not received from any Tenant any written  notice  claiming any material
         default by Seller under any of the Leases  which has not been  complied
         with, or claiming any right of set-off or counterclaim  against Seller;
         (7) except as set forth on  Exhibit D,  Seller has not given any Tenant
         any written notice claiming any material defaults or nonpayment of rent
         by such  Tenant  under any of the  Leases  which has not been  complied
         with;  (8)  except  as set  forth  on  Exhibit  D, all  Tenants  are in
         occupancy of their  respective  premises  under the Leases and all work
         required to be  performed  by the  landlord  pursuant to the Leases has
         been completed and fully paid for; (9) the information contained in





<PAGE>


                                                                              16




         the Rent Roll  annexed  hereto as Exhibit D is true and  correct in all
         material  respects  and  contains  a schedule  of every  Lease and each
         modification  and amendment to each Lease;  (10) except as set forth on
         Exhibit D, Seller has not accepted any prepaid  rent or  prepayment  of
         any  other  sum due under the  Leases  more  than  thirty  (30) days in
         advance;  (11) the security  deposits set forth on Exhibit D hereto are
         all the security  deposits  paid by Tenants  under their  Leases;  (12)
         except as set forth in  Exhibit D, all  Tenants  are in  possession  of
         their  respective  premises and are not more than 30 days in arrears in
         payment of fixed rent due under their respective  leases, and no Tenant
         has contested in a written notice to landlord any amounts payable under
         its Lease;  and (13) no appraisal or other process  provided for in any
         Lease  has been  instituted  in  writing  by  Seller  or any  Tenant to
         establish the rental rate payable with respect to any pending extension
         or expansion or with  respect to any  negotiation  or appraisal of rent
         under  any  Lease.  Except  as set  forth in  Exhibit  D, no  brokerage
         commission,  fee or other  compensation  is payable (or will,  with the
         passage of time or occurrence  of any event or both, be payable),  with
         respect to any Lease pursuant to any existing  agreement which would be
         binding on the landlord  under such Lease after the Closing Date.  True
         and complete  copies of the  agreements  (and all  amendments  thereto)
         pursuant   to  which  such   brokerage   commissions,   fees  or  other
         compensation  are payable are attached  hereto as Exhibit T. There will
         not remain in effect  after the Closing  any  exclusive  or  continuing
         brokerage  agreements  binding  on  Purchaser  as to any  of the  space






<PAGE>


                                                                              17




         covered by the Leases or as to any space in the Improvements. As of the
         Closing Date, no actual or pending claims or rights exist or may accrue
         against Seller and which will be binding on Purchaser for any brokerage
         commission,  fee or other compensation in respect of all or any portion
         of the Improvements that is subject to a Lease.

                                    5.1.3.2  No  management  commission,  fee or
         other  compensation  will be  payable by  Purchaser  from and after the
         Closing Date with respect to the  management of the Real Property prior
         to the Closing Date.

                                    5.1.3.3 To the best of  Seller's  knowledge,
         the  documents  listed  on  Exhibit  L hereto  are all of the  Licenses
         (including all  amendments,  modifications,  supplements and extensions
         thereof)  and Seller  has not  received  any  written  notice  from any
         Governmental  Authority that Seller is in default under or has breached
         any  of  the   Licenses.   No   representation   is   made  as  to  the
         transferability  of such  licenses.  Attached  hereto as Exhibit M is a
         true, correct and complete copy of the current certificate of occupancy
         for the Improvements.

                                    5.1.3.4  Seller has no  patents,  registered
         trademarks  or  registered  trade  names  which are used by Seller with
         respect to the Real Property.

                  Section  5.2   Survival  of   Seller's   Representations   and
Warranties.  At Closing,  Seller shall deliver to Purchaser a certificate of the
Seller which will confirm that its warranties and  representations  contained in
this  Agreement are in all material  respects true and correct as of the date of
the Closing (to the best of Seller's





<PAGE>


                                                                              18




knowledge,  where so  specified  above and limited to the time period  described
above, where so specified).  Seller's  representations  and warranties shall not
survive the Closing except as follows:  (i) the  representations  and warranties
contained in Sections 5.1.1.5.,  5.1.2.1, 5.1.2.3-13 and 5.1.3.1-4 shall survive
the Closing,  provided that Purchaser shall be deemed to have irrevocably waived
any claim  with  respect  thereto  as to which  Purchaser  has not given  Seller
written  notice within a period of one (1) year after the Closing Date, and (ii)
the  representations  and warranties  contained in subsections  5.1.1.1-4  shall
survive indefinitely, subject to the statute of limitations.

                  Section  5.3  Purchaser's   Representations,   Warranties  and
Covenants.  In order to induce  Seller to enter into this  Agreement,  Purchaser
hereby represents and warrants to and covenants with Seller as follows:

                           5.3.1  Purchaser  is a real estate  investment  trust
duly  organized,  validly  existing and in good  standing  under the laws of the
State of Maryland.  Purchaser has full right,  power and authority to enter into
and perform its obligations  under this Agreement and the other  instruments and
documents  contemplated herein to be executed and performed by it. The execution
and delivery of this Agreement and such other  instruments and documents and the
consummation of the transactions  contemplated  hereby and thereby (1) have been
duly authorized by all necessary action on the part of the Purchaser, (2) do not
require any consent or approval of or notice to any Governmental Authority,  and
(3)  will  not  result  in the  breach  of any  agreement,  indenture  or  other
instrument to which Purchaser is a party 





<PAGE>


                                                                              19



or is otherwise bound. Further, this Agreement constitutes the valid and binding
obligation of Purchaser.

                           5.3.2 At Closing, Purchaser shall deliver to Seller a
certificate  of the  Purchaser  which  will  confirm  that  its  warranties  and
representations  contained in this  Agreement are in all material  respects true
and  correct  as of the date of the  Closing.  Purchaser's  representations  and
warranties  contained in Section 5.3.1 shall  survive the Closing  indefinitely,
subject to the statute of limitations.

                           5.3.3  Prior to the  Closing,  Purchaser  shall  not,
without  the prior  written  consent  of  Seller,  enter  into any New Lease (as
defined below), nor shall Seller solicit or entertain  inquiries with respect to
the leasing of space in the Improvements.

                  Section 5.4 Seller's Covenants.

                           5.4.1 Seller  agrees that between the date hereof and
the Closing Date it shall continue to operate the Real Property and the Personal
Property in substantially the same manner it has been operated prior to the date
hereof. Such normal operation by Seller shall include,  without limitation,  the
maintenance  by Seller of Seller's  usual books and  records and  compliance  by
Seller with its obligations as Landlord under the Leases, subject to the express
provisions of this Agreement.

                           5.4.2 Seller covenants and agrees that from and after
the date of this Agreement until the Closing Date or earlier termination of this
Agreement:

                                    5.4.2.1  Except  as  otherwise  provided  in
         Section  5.4.2.8  below,  Seller will not,  without  the prior  written
         consent  of  Purchaser,  enter  into  





<PAGE>


                                                                              20




         any new employment,  service or maintenance  agreements relating to the
         Property or renew or extend any  Contracts,  unless such new agreements
         and such  Contracts,  as renewed or  extended,  will be  cancelable  by
         Purchaser  on not more than thirty (30) days prior  notice  without any
         costs for such cancellation.

                                    5.4.2.2 The insurance  policies described on
         Exhibit  I  (or  substantially  similar  substitute  polices  and  with
         companies of similar or better financial  strength) shall be maintained
         in full force and effect.

                                    5.4.2.3  Seller  will not sell,  encumber or
         grant any  interest  in the  Property  or any part  thereof or interest
         therein.

                                    5.4.2.4  Seller will not,  without the prior
         written  consent  of  Purchaser,  enter  into  any  new  Lease,  permit
         occupancy of space on the Real  Property  which is presently  vacant or
         which may hereafter  become vacant or extend or renew any of the Leases
         (collectively, a "New Lease").

                                    5.4.2.5  Seller will not terminate or accept
         a surrender of any Lease which is not in default or modify,  cancel, or
         amend any Lease,  or release any Tenant from liability  under any Lease
         without the prior written consent of Purchaser.

                                    5.4.2.6  Seller will not initiate any action
         to alter or amend the zoning  classification  of the Real Property,  or
         otherwise  intentionally  perform any act or deed which shall diminish,
         encumber or affect Purchaser's rights in and to the Property or prevent
         Seller from performing fully its obligations hereunder.






<PAGE>


                                                                              21




                                    5.4.2.7   Seller   shall  not   solicit   or
         encourage   directly   or   indirectly   (including   solicitation   or
         encouragement by any broker retained by Seller), inquiries or proposals
         with respect to, furnish any information relating to, or participate in
         any  negotiation  concerning  any  proposal  for the  sale of the  Real
         Property or the Property.

                                    5.4.2.8  Seller shall not enter into any new
         management agreement relating to the Real Property (and shall cancel or
         cause  the  cancellation  as  of  the  Closing  Date  of  any  existing
         management agreement relating to the Real Property.)

                                    5.4.2.9  Seller shall,  upon learning of any
         material change in any condition with respect to the Property or of any
         event or  circumstance  which makes any  representation  or warranty of
         Seller to Purchaser under this Agreement untrue or misleading, promptly
         notify Purchaser thereof.

                           5.4.3  From and  after  the  date of this  Agreement,
Seller  will  defend or will  cause its  insurance  carrier to defend any claims
resulting from Seller's  alleged breach of any contractual  obligation of Seller
(including  without  limitation,  any of the  Leases)  and any tort  claims with
respect to the Real Property or the Property which arose before the Closing Date
so that  Purchaser  will have no  liability  with respect to such claims for any
loss, costs or damages in connection  therewith,  including litigation costs and
expenses.

                           5.4.4   Seller   shall  remove  or  comply  with  any
violations of law or municipal  ordinances,  or orders or requirements  noted or
issued by any  





<PAGE>


                                                                              22




Governmental  Authority against or affecting the Real Property prior to the date
hereof;  provided,  however,  that if such  removal or  compliance  has not been
completed prior to the Closing,  Purchaser shall receive at the Closing a credit
against  the  Purchase  Price in an  amount  to be  agreed  upon by  Seller  and
Purchaser to cover the  reasonably  estimated  unpaid cost to effect or complete
such removal or compliance,  and Purchaser  shall be required to accept title to
the Real Property or the Personal Property subject thereto.  Notwithstanding the
foregoing,  Purchaser  shall have the right to adjourn  the Closing in the event
that  Seller  has  failed to remove  or  comply  with any of the  aforementioned
matters if the  reasonably  estimated  unpaid  cost to effect or  complete  such
removal or compliance is greater than $500,000 until such time as Seller removes
or complies with such matters to the extent that the reasonably estimated unpaid
cost to effect or  complete  such  removal or  compliance  with  respect to such
matters is less than  $500,000,  at which time the Closing  shall  occur  within
three (3) business days notice by Seller to Purchaser, provided Seller shall, at
such time, provide Purchaser with evidence reasonably  satisfactory to Purchaser
of such removal or compliance. Notwithstanding the foregoing, violations which a
Tenant in occupancy  is required to remove or comply with  pursuant to the terms
of its Lease, may not be asserted by Purchaser as objections to title and Seller
shall have no obligation to remove the same.

                  Section 5.5 As Is.  Purchaser is  purchasing  the Property "as
is" and in its present  condition,  subject to reasonable  use,  wear,  tear and
natural  deterioration  between  the date  hereof and the  Closing,  without any
reduction in the Purchase  Price for any such change in such condition by reason
thereof subsequent to the date hereof.  





<PAGE>


                                                                              23




Purchaser  acknowledges that in entering into this Agreement  Purchaser has made
such examination of the Property, the operation, income and expenses thereof and
all other  matters  affecting or relating to this  transaction  as Purchaser has
deemed  necessary.  In  entering  into this  Agreement,  Purchaser  has not been
induced  by  and  has  not  relied  upon  any  representations,   warranties  or
statements, whether express or implied, made by Seller or any agent, employee or
other  representative  of Seller or by any other person  purporting to represent
Seller, which are not expressly set forth in this Agreement,  whether or not any
such representations, warranties or statements were made in writing or orally.

                                    Article 6
                                     Closing

                  Section 6.1  Conditions to  Purchaser's  Obligations to Close.
The  obligation  of  Purchaser  to close  under  this  Agreement  and to pay the
Purchase Price shall be subject to the fulfillment on and as of the Closing Date
of all of the  following  conditions  (in  addition to any other  conditions  to
Purchaser's  obligations  under  this  Agreement  which are set forth  elsewhere
herein):

                           6.1.1 Seller shall have delivered to Purchaser all of
Seller's Closing Documents provided for in Section 6.6 hereof.

                           6.1.2 All of the  representations  and  warranties of
Seller  contained  in this  Agreement  shall be true and correct in all material
respects on and as of the Closing Date as if the same were made on and effective
as of such date.






<PAGE>


                                                                              24




                           6.1.3 Seller shall have  performed and  observed,  in
all  material  respects,  all  covenants,  agreements  and  conditions  of  this
Agreement  to be  performed  and  observed  by  Seller as of the  Closing  Date.
Purchaser shall have the right,  at its election,  at or prior to the Closing by
notice to  Seller,  to waive  the  fulfillment  of any  condition  precedent  to
Purchaser's  obligation  to  close  hereunder  and  by  effecting  the  Closing,
Purchaser  shall be deemed to have waived any such condition not then fulfilled.
Nothing contained in the preceding sentence,  however, shall limit, constitute a
waiver  or  otherwise  affect  the  liability  of  Seller  with  respect  to any
covenants, indemnities, warranties and representations which survive the Closing
pursuant to the terms hereof.

                           6.1.4 All management  agreements relating to the Real
Property shall have been cancelled.

                           6.1.5 Seller shall have provided evidence  reasonably
satisfactory  to Purchaser  and the Title  Insurer that  Seller's  execution and
delivery of this Agreement and the instruments  executed and delivered  pursuant
hereto have been duly authorized by all necessary action on the part of Seller.

                           6.1.6 No action shall be pending or threatened with a
condemnation or taking by power of eminent domain of all or any material portion
of the Real Property.

                           6.1.7 Shall have  delivered to Purchaser an unaudited
financial  statement  (prepared  by  extrapolation  from  an  audited  statement
covering  other  properties as well as the Real  Property) for the Real Property
with respect to the 1996 





<PAGE>


                                                                              25




calendar  year and the period  beginning  January 1, 1997 and ending on the last
day of the most recent  calendar  month prior to the Closing  Date which ends at
least 15 days prior to the Closing Date, such financial statements to be in form
and substance reasonably acceptable to Purchaser.

                  Section 6.2 Conditions to Seller's  Obligations to Close.  The
obligation  of Seller to close  under  this  Agreement  shall be  subject to the
fulfillment on or before the Closing Date of all of the following conditions (in
addition to any other  conditions to Seller's  obligations  under this Agreement
which are set forth in this Agreement):

                           6.2.1 Purchaser shall have delivered to Seller all of
the items required to be delivered to Seller pursuant to Section 6.6 hereof, and
the Escrow Agent shall pay the Earnest Money Deposit to Seller.

                           6.2.2 All of the  representations  and  warranties of
Purchaser  contained in this Agreement shall be true and correct in all material
respects on and as of the Closing Date as if the same were made on and effective
as of such date.

                           6.2.3 Purchaser shall have performed and observed, in
all  material  respects,  all  covenants,  agreements  and  conditions  of  this
Agreement  to be  performed  or observed by  Purchaser  as of the Closing  Date.
Seller  shall  have the right,  at its  election  at or prior to the  Closing by
notice to Purchaser,  to waive the  fulfillment  of any  condition  precedent to
Seller's  obligation to close  hereunder  and by effecting  the Closing,  Seller
shall be deemed to have waived any such  condition not then  fulfilled.  Nothing
contained in the preceding sentence,  however, shall limit,  constitute a waiver
or otherwise  affect the liability of Purchaser  with respect to any  





<PAGE>


                                                                              26




covenants, warranties,  representations or indemnities which survive the Closing
pursuant to the terms hereof.

                           6.2.4   Purchaser   shall  have   provided   evidence
reasonably  satisfactory  to Seller that  Purchaser's  execution and delivery of
this Agreement and the instruments  executed and delivered  pursuant hereto have
been duly authorized by all necessary action on the part of Purchaser.

                  Section 6.3 Escrow and Closing.

                           6.3.1 Prior to the date hereof,  Purchaser and Seller
have  caused  an escrow to be opened  by the  Escrow  Agent for the  purpose  of
holding the Earnest  Money  Deposit.  The Earnest Money Deposit shall be held in
escrow by Escrow Agent until (a) the Closing, upon which event the Earnest Money
Deposit  shall be delivered to Seller;  (b) five (5) business  days after Escrow
Agent shall have given Seller or Purchaser notice that it has received a written
notice sent by the other party to this Agreement stating that this Agreement has
been terminated and that the party so notifying  Escrow Agent is entitled to the
Earnest Money Deposit, following which period the Earnest Money Deposit shall be
(i) delivered to Seller, in the case of a notice from Seller stating that Seller
is entitled to the Earnest Money Deposit, or (ii) delivered to Purchaser, in the
case of a notice  from  Purchaser  stating  that  Purchaser  is  entitled to the
Earnest  Money  Deposit,  provided that within such five (5) business day period
Escrow Agent does not receive either a notice containing  contrary  instructions
from the other party hereto or a court order restraining  payment of the Earnest
Money Deposit;  or (c) a joint notice is received from Seller and Purchaser,  in






<PAGE>


                                                                              27




which event Escrow Agent shall deliver the Earnest Money Deposit or the proceeds
thereof in accordance with the instructions therein contained. The Earnest Money
Deposit shall be invested by Escrow Agent in an interest bearing money market or
bank  account  at  Citibank,  N.A.  or any  other  member  bank of the New  York
Clearinghouse Association,  but Escrow Agent shall not be liable for any failure
to do so or for any loss  incurred by reason of any such  investments.  Interest
earned on the  Earnest  Money  Deposit  shall be credited  to  Purchaser  at the
Closing.

                           6.3.2 In the event that (i) Escrow  Agent  shall have
received a notice containing conflicting instructions as provided for in Section
6.3.1  hereof  and  within  the  time  therein  prescribed,  or  a  court  order
restraining  payment of the Earnest  Money Deposit or under the Letter of Credit
or (ii) any other disagreement or dispute shall arise between the parties hereto
resulting  in adverse  claims or demands  being made upon  Escrow  Agent for the
Earnest Money Deposit or the Letter of Credit or the proceeds  thereof,  whether
or not litigation has been  instituted,  then and in any such event Escrow Agent
shall refuse to comply with any claims or demands on it and continue to hold the
Earnest  Money  Deposit or the Letter of Credit or the proceeds  thereof,  until
Escrow  Agent  receives  either (a) a written  notice  signed by both Seller and
Purchaser  directing the  disposition of the Earnest Money Deposit or the Letter
of Credit or the proceeds thereof,  or (b) a final order of a court of competent
jurisdiction,  entered in a proceeding  in which  Seller,  Purchaser  and Escrow
Agent are named as parties,  directing  the  disposition  of the  Earnest  Money
Deposit  or the  Letter of Credit or the  proceeds  thereof,  in either of which
events  Escrow  Agent  shall then  dispose of 





<PAGE>


                                                                              28




the Earnest  Money Deposit or the Letter of Credit or the proceeds  thereof,  in
accordance  with said  direction.  Escrow Agent shall not be or become liable in
any way to any person or entity for its  refusal to comply  with any such claims
or demands until and unless it has received a direction of the nature  described
in (a) or (b)  above.  Upon the  taking  by Escrow  Agent of any of the  actions
described  in (a) and (b) above,  Escrow Agent shall be released of and from all
liability   hereunder  except  as  otherwise   expressly  provided  for  herein.
Notwithstanding  the foregoing  provisions of this Section  6.3.2,  Escrow Agent
shall have the following  rights in the  circumstances  described in subsections
(i) and (ii) above:  (x) if Escrow  Agent shall have  received a written  notice
signed by either Seller or Purchaser  advising that litigation between Seller or
Purchaser over  entitlement to the Earnest Money Deposit or the Letter of Credit
or the proceeds thereof has been commenced,  Escrow Agent may, on written notice
to Seller and  Purchaser,  deposit  the Earnest  Money  Deposit or the Letter of
Credit  or the  proceeds  thereof  with  the  Clerk of the  court in which  such
litigation is pending,  or (y) Escrow Agent may, on written notice to Seller and
Purchaser,  take such affirmative steps as it may, at its option, elect in order
to terminate its duties as Escrow Agent  hereunder,  including,  but not limited
to, the  deposit  of the  Earnest  Money  Deposit or the Letter of Credit or the
proceeds thereof with a court of competent  jurisdiction and the commencement of
an action for interpleader, the costs thereof to be borne by whichever of Seller
or Purchaser is the losing  party,  i.e.,  the party not entitled to the Earnest
Money Deposit or the Letter of Credit or the proceeds  thereof.  Upon the taking
by Escrow Agent of either of the actions  described in (x) 





<PAGE>


                                                                              29




or (y) above, Escrow Agent shall be released of and from all liability hereunder
except for any previous willful misconduct or gross negligence.

                           6.3.3  Seller and  Purchaser  understand  that Escrow
Agent acts  hereunder as depository  only and is not  responsible  in any manner
whatever  for the  sufficiency,  correctness,  genuineness  or  validity  of any
instrument  delivered to it, or for the form of execution of such  instrument or
for the identity,  authority or rights of any person(s)  executing or delivering
the same or for the terms or conditions of any instrument  pursuant to which the
parties may act.  Escrow Agent shall not have any  liability or  obligation  for
loss of all or any portion of the Earnest  Money Deposit or the Letter of Credit
or  the  proceeds  thereof  by  reason  of  the  insolvency  or  failure  of the
institution or depositary with which such proceeds are maintained.

                           6.3.4  Escrow  Agent  shall  not have any  duties  or
responsibilities  except those set forth in this  Agreement  and shall not incur
any liability in acting upon any signature,  notice,  request,  waiver, consent,
receipt or other paper or document  believed by Escrow Agent to be genuine,  and
Escrow  Agent may  assume  that any person  purporting  to give it any notice on
behalf of any  party in  accordance  with the  provisions  hereof  has been duly
authorized to do so. Escrow Agent shall not be liable for any errors in judgment
or for any acts done or omitted by it in good faith, or for any mistakes of fact
or law and is released and exculpated  from all liability  hereunder  except for
willful misconduct or gross negligence.

                           6.3.5  Subject to Section 6.3.2 as to the costs to be
borne by Seller or Purchaser,  Seller and Purchaser  jointly and severally agree
to  reimburse  





<PAGE>


                                                                              30




Escrow  Agent  for its  reasonable  costs  and  expenses,  including  reasonable
attorneys'  fees (either paid to retained  attorneys  or  representing  the fair
value of legal services  rendered by Escrow Agent to itself),  disbursements and
other charges,  incurred as a result of any dispute or litigation concerning the
right to the Earnest Money  Deposit.  Escrow Agent has executed  this  Agreement
solely to confirm that it is holding and will hold the Earnest  Money Deposit in
escrow pursuant to the provisions herein contained and for no other purpose.

                           6.3.6  Purchaser  acknowledges  that Escrow  Agent is
representing Seller in connection with the sale of the Property pursuant to this
Agreement  and agrees that Escrow Agent may  continue to  represent  Seller with
respect  thereto  and in  any  dispute  arising  out of  this  Agreement  or the
documents and instruments contemplated hereby, notwithstanding that Escrow Agent
shall simultaneously be acting as the escrow agent hereunder or in such dispute.

                           6.3.7 The terms and provisions herein contained shall
create  no right in any  person,  firm or  corporation  other  than  Seller  and
Purchaser and their respective  successors and permitted  assigns,  and no third
party  shall  have the right to  enforce  or  benefit  from any of the terms and
provisions herein contained.

                           6.3.8 The closing of the transaction  provided for in
this  Agreement  (the  "Closing")  will be held at 10:00 a.m.  at the offices of
Paul,  Weiss,  Rifkind,  Wharton  &  Garrison  in  New  York,  New  York  (or at
Purchaser's  request,  at the offices of Purchaser's lender in New York City, or
at such other place upon which Seller and Purchaser  shall agree) on the Closing
Date. Time shall be of the essence as 





<PAGE>


                                                                              31




to each  party's  obligation  to close title to the  Property  on the  scheduled
closing  date,  as such date may be  adjourned  as provided  in this  Agreement.
Notwithstanding  the  foregoing,  the Closing Date may be adjourned by Seller or
Purchaser  one or more times to a  business  day not later than ten (10) days in
the aggregate  following the Closing Date, by notice given to the other party at
least two (2)  business  days  prior to the  original  or  previously  scheduled
Closing Date.

                  Section  6.4  Prorations.  Each  of  the  following  shall  be
apportioned  between Seller and Purchaser as of 11:59 P.M. Eastern Standard Time
on the day preceding the date of the Closing (the "Adjustment  Point") and shall
be documented in a statement (the "Closing Statement") executed and delivered by
Seller and Purchaser:

                           6.4.1 Rents as and when  collected.  The word "Rents"
as used in this Section  6.4.1 shall be deemed to include fixed monthly rents as
well as any additional rents (including,  without  limitation,  real estate tax,
cost of living,  operating  cost and labor wage rate  escalations  and  electric
charges) (the  "Additional  Rents")  payable by Tenants,  and the term "costs of
collection"  shall mean and include  reasonable  attorneys' fees and other costs
incurred by Purchaser or Seller in collecting  any Rents,  but shall not include
the regular fees payable to any managing agent of the Premises, the payroll cost
of any of  Purchaser's  employees  or any other  internal  costs or  overhead of
Purchaser.

                                    (i) Any Rents collected by Purchaser (which,
for  purposes of this  Section  6.4.1,  shall  include  Rents  collected  by any
managing agent acting for Purchaser)  subsequent to the Closing (whether due and
payable prior to or 





<PAGE>


                                                                              32




subsequent  to the  Adjustment  Point)  shall be adjusted  as of the  Adjustment
Point,  and any  portion  thereof  properly  allocable  to periods  prior to the
Adjustment Point, net of costs of the collection  properly allocable thereto, if
any, shall be paid by Purchaser to Seller promptly after the collection  thereof
by Purchaser, but subject to the further provisions of this Section 6.4.1 in the
case of Rents due  prior to the  Adjustment  Point.  Additional  Rents  shall be
adjusted based on the calendar or fiscal year or other period for which the same
are charged pursuant to each Lease.

                                    (ii) At the Closing  Seller shall deliver to
Purchaser a list of all Tenants  which are  delinquent in payment of Rents as at
the  Adjustment  Point,  which  list  shall set  forth  the  amount of each such
delinquency, the period to which each such delinquency relates and the nature of
the amount due,  itemizing  separately fixed monthly rent,  escalation  charges,
electric charges, charges for tenant services, charges for overtime services and
other  charges,  if any. The first  amounts  collected  by  Purchaser  from each
delinquent Tenant, net of costs of collection,  if any, shall be deemed to be in
payment of Rents for the month in which the Closing  occurs,  next in payment of
delinquent Rents (or the specific components of Rents) owed by such Tenant which
are not more than one (1) month in  arrears  as of the first day of the month in
which the Closing  occurs,  as set forth in such list,  next in payment of Rents
then due on account of any month after the month in which the Closing occurs and
finally in payment of  delinquent  Rents (or the specific  components  of Rents)
which are more than one (1) month in arrears as of the first day of the month in
which the Closing  occurs,  as set forth on such list. Any amounts  collected by
Purchaser from 





<PAGE>


                                                                              33




each delinquent  Tenant which, in accordance  with the preceding  sentence,  are
allocable  to the month in which  the  Closing  occurs  (as  adjusted  as of the
Adjustment  Point)  or any  prior  month,  net of costs of  collection  properly
allocable  thereto,  if any,  shall be paid  promptly  by  Purchaser  to Seller.
Purchaser shall exert reasonable  efforts to bill and collect any  delinquencies
and the amount thereof, as, when and to the extent collected by Purchaser, shall
be remitted by Purchaser to Seller, net of costs of collection, if any, promptly
after the  collection  thereof by Purchaser;  provided that  Purchaser  shall be
deemed to have met its obligation hereunder to bill and collect delinquencies if
it shall have (i) billed such  delinquencies  and (ii) followed up such billings
with a telephone call to each of the delinquent Tenants.

                           6.4.2 Taxes,  vault charges and sewer rents,  if any,
on the basis of the New York City Fiscal Year for which  assessed.  Prior to the
Closing  Date,  Seller  is hereby  authorized  to  continue  any  proceeding  or
proceedings  now pending for the  reduction  of the  assessed  valuation  of the
Premises, which relate to the New York City Fiscal Year during which the Closing
Date occurs,  or any prior New York City Fiscal  Year,  and to try or settle the
same in Seller's reasonable discretion, provided, however, that (i) any decision
by Seller to settle any such  proceeding  relating  to the New York City  Fiscal
Years  1992/93,  1993/94,  1994/95,  1996/97  and/or 1997/98 shall be subject to
approval by Purchaser,  in Purchaser's reasonable discretion,  and (ii) that the
net  refund of taxes,  if any,  for any tax year for  which  Purchaser  shall be
entitled to share in the refund shall be divided between Seller and Purchaser in
accordance  with the  apportionment  of taxes pursuant to the provisions of this
Section  6.4  after  deducting  





<PAGE>


                                                                              34




therefrom a pro rata share of all expenses,  including counsel fees, necessarily
incurred in obtaining  such refund,  the allocation of such expenses to be based
upon the total refund  obtained in such  proceeding and in any other  proceeding
simultaneously  involved  in the trial or  settlement.  At the  Closing,  all of
Seller's  interest  in any such  proceeding  for the New York City  Fiscal  Year
following  the year in which the Closing  Date occurs  shall be  transferred  to
Purchaser,  which  shall  be  substituted  for  Seller  as  protesting  party or
plaintiff  thereunder.  Following the Closing Date,  Purchaser may try or settle
the  aforementioned  1992/93,  1993/94,  1994/95,  1995/96,  1996/97 and 1997/98
proceedings in Purchaser's sole discretion, provided, however, that any decision
to  settle  any such  proceeding  relating  to the New York  City  Fiscal  Years
1992/93,  1993/94,  1994/95,  1995/96,  and 1996/97 shall be subject to Seller's
approval,  in Seller's  reasonable  discretion.  Seller agrees to cooperate with
Purchaser in a reasonable  manner in any such proceedings  following the Closing
Date until such proceedings are settled or otherwise resolved.  Each party shall
deliver to the other, upon demand, receipted tax bills and cancelled checks used
in  payment  of such  taxes  and shall  execute  any and all  consents  or other
documents,  and do any act or thing reasonably  requested by the other party for
the  continuation  of such  proceedings and the collection of any refund by such
party. In the event that following the Closing Date Purchaser  receives any real
estate tax refund on account of the applications  previously filed by Seller for
the New York City Fiscal  Years  1992/93,  1993/94,  1994/95,  1995/96,  1996/97
and/or  1997/98,  such refund  amounts,  if any,  shall be promptly paid over by
Purchaser to Purchaser's  managing agent,  and Seller and Purchaser shall direct





<PAGE>


                                                                              35




such person or entity to reimburse  the  appropriate  Tenants  their  respective
shares of any such amounts and  apportion  any  remaining  amounts to Seller and
Purchaser in accordance  with the  provisions of Section 6.4 of this  Agreement.
Seller  shall use  reasonable  efforts  to cause any such  refunds to be paid to
Purchaser rather than Seller. If,  notwithstanding such efforts, any such refund
is paid to Seller,  Seller shall reimburse the appropriate  Tenants (or pay over
to Purchaser or its managing agent,  which shall promptly  thereafter  reimburse
the appropriate  Tenants) their respective  shares of such refunds and apportion
any remaining  amounts to Seller and Purchaser in accordance with the provisions
of Section 6.4 of this  Agreement.  The  provisions  of this Section 6.4.2 shall
survive the Closing.

                           6.4.3 Utilities,  including steam, electricity, water
and gas,  except  those  charges  (if any) that  Tenants  are  obligated  to pay
directly to the  providers  of such  utilities.  Seller  shall  endeavor to have
meters for such utilities read the day preceding the Closing and agrees to cause
the bills  rendered to it on the basis of such  readings  to be paid.  If Seller
does not  obtain  such a meter  reading  for any such  utility,  the  adjustment
therefor  shall be made on the basis of the most recently  issued bill therefor.
If there be water meters on the  Premises,  Seller shall  furnish  readings to a
date not more than  thirty  days prior to the date of  Closing,  and the unfixed
meter  charges  and the  unfixed  sewer  rents,  if any,  based  thereon for the
intervening  time,  except those charges and rents that Tenants are obligated to
pay directly to the utility or governmental authority in question, if any, shall
be apportioned on the basis of such last readings.






<PAGE>


                                                                              36




                           6.4.4  Charges paid or payable  under  Contracts  and
assumed by Purchaser.

                           6.4.5 Fees for transferable governmental licenses and
permits required for the operation and maintenance of the Premises.

                           6.4.6 Purchaser shall have the right, upon reasonable
advance  notice  (which  notice may be oral)  within  the 5 business  day period
immediately  preceding  the Closing,  to inspect the supplies at the Property in
order to determine whether the condition set forth in the immediately  preceding
sentence  has  been  satisfied.   Seller  shall  have  the  right  to  have  its
representative   present  during  any  such   inspection.   Seller  agrees  that
substantially  all of the  materials  and  supplies  (collectively,  "supplies")
listed on  Exhibit S annexed  hereto  shall be located  at the  Property  on the
Closing Date and that title to such supplies  shall be  transferred to Purchaser
on the  Closing  Date.  Purchaser  shall pay the sum of $25,000 to Seller at the
Closing  in full  consideration  for such  supplies.  In the event the  supplies
located at the Property at the Closing Date are  substantially the same as those
listed on Exhibit S, the aforesaid $25,000 amount shall be equitably redeemed at
the Closing.

                           6.4.7  Deposits,  if any, made by Seller with utility
companies or  governmental  agencies in respect of the Premises which will inure
to the benefit of Purchaser subsequent to the Closing.

                           6.4.8  Any   other   items   which  are   customarily
apportioned  upon the sale of an office building similar to the Real Property in
New York City.






<PAGE>


                                                                              37




                           6.4.9  All  accrued  wages and  benefits  (including,
without limitation, accrued vacation pay) of the employee referred to in Section
5.1.2.5  hereof who will be  employed  by Seller  shall be paid (or caused to be
paid) by Seller at or prior to the  Closing,  or to the extent not so paid,  all
unpaid  amounts  shall be  allowed  to  Purchaser  as a credit at  Closing,  and
Purchaser will be responsible for payment thereof to such employees.

                  Notwithstanding  anything to the  contrary  contained  in this
Section 6.4, Seller has given  permission to Accessory  Network to sublet all of
the  Premises  demised  to it under its Lease  with  Seller in return for a cash
payment  equal to  $500,000.  This amount is to be paid  directly  by  Accessory
Network  to Seller  notwithstanding  the fact that this  payment  is not due and
payable  by  Accessory  Network  until  October,  1997,  and if for  any  reason
collected by Purchaser,  shall be  immediately  remitted by Purchaser to Seller.
The provisions of this Section 6.4 shall survive the Closing.

                  Section 6.5  Closing Costs.

                           6.5.1 Seller agrees to pay and indemnify Purchaser in
respect of the following expenses in respect to the transactions contemplated by
this Agreement: (a) New York State and City transfer taxes payable in respect of
this  transaction;  (b) Seller's  legal fees;  (c) the  commission  due Seller's
Broker;  and (d)  one-half of any sales tax imposed with respect to the supplies
referred to in Section 6.4.6.

                           6.5.2 Purchaser agrees to pay and indemnify Seller in
respect  of the  following  fees and  expenses  in  respect  to the  transaction
contemplated by this Agreement:  (a) the cost of all engineering,  environmental
and other  reports  and  





<PAGE>


                                                                              38




studies of the Premises  ordered by Purchaser or its authorized  representative;
(b) Purchaser's legal fees; (c) sales tax, if any, payable by reason of the sale
of the personal  property (other than the supplies referred to in Section 6.4.6)
included in this sale (the  parties  agreeing,  however,  that no portion of the
Purchase Price is allocable to personal property); (d) one-half of any sales tax
imposed with respect to the supplies  referred to in Section  6.4.6;  (e) survey
costs;  (f) the  premium  on the  title  insurance  policy  issued  by the Title
Company;  and (g) all recording and filing fees or charges payable on account of
the recording of the deed delivered in connection with this Agreement.

                           6.5.3  The  provisions  of  this  Section  6.5  shall
survive the Closing or any termination of this Agreement.

                  Section 6.6  Closing Deliveries.

                           6.6.1 Seller shall  deliver at Closing the  following
documents ("Seller's Closing Documents"):

                                    6.6.1.1  A  bargain  and sale  deed  without
         covenant  against  grantor's  acts with respect to the Real Property in
         the form attached hereto as Exhibit F-4,  together with a duly executed
         NYS Form TP-584,  and such other completed transfer  declarations,  tax
         returns and affidavits with respect to such deed as may be required for
         recordation of the deed by state, county or local law, if any;

                                    6.6.1.2   A  bill   of  sale   from   Seller
         evidencing  the sale of the Personal  Property,  if any, in the form of
         Exhibit F-1;






<PAGE>


                                                                              39




                                    6.6.1.3  An  assignment  of  the  Contracts,
         Licenses, Utility Deposits and Intangible Property, if any, from Seller
         in the form of Exhibit F-2;

                                    6.6.1.4 A certificate  of Seller  confirming
         the continued  accuracy of the warranties and  representations  made by
         Seller in this Agreement as required by Section 5.2;

                                    6.6.1.5 Estoppel letters,  dated not earlier
         than  thirty  (30)  days  prior to the  Closing  Date,  from all of the
         Tenants of the Building,  such estoppel  letters to be in substantially
         the form annexed  hereto as Exhibit J; provided,  however,  that if any
         Lease provides for the form or content of an estoppel letter, Purchaser
         shall  accept an estoppel  letter as called for in such  Lease.  Seller
         will request,  and use reasonable  efforts to obtain,  on or before the
         Closing Date,  from the Tenants under the Leases,  estoppel  letters in
         substantially the form annexed hereto as Exhibit J;

                                    6.6.1.6 A letter to  Tenants  advising  them
         (i) of the  change in  ownership  of the  Property,  (ii) the amount of
         their security  deposit and any prepaid rent that has been delivered to
         Purchaser,  and the  name of the  banking  institution  in  which  such
         deposits will be maintained following the Closing, (iii) directing them
         to pay rent to Purchaser or as Purchaser may direct, and (iv) directing
         them to deliver to Purchaser or as Purchaser  may direct,  an insurance
         certificate  in the form  required  under such  Tenant's  Lease for the
         benefit of Purchaser;






<PAGE>


                                                                              40




                                    6.6.1.7 A letter to all parties  (other than
         Seller) to the  Contracts  advising  them of the change in ownership of
         the Property.

                                    6.6.1.8  Appropriate  evidence  of  Seller's
         right,  power and  authority  to sell the  Property to Purchaser on the
         terms  and  conditions  of this  Agreement  as  Purchaser  or the Title
         Insurer may reasonably require;

                                    6.6.1.9 An  affidavit  executed on behalf of
         Seller  providing  Seller's  taxpayer   identification   number  and  a
         statement  that  Seller is not a foreign  person  within the meaning of
         Section 1445(f)(3) of the Internal Revenue Code, as amended;

                                    6.6.1.10  A  complete  set of all  keys  and
         magnetic  pass  cards to the  Improvements,  appropriately  tagged  for
         identification, to the extent in Seller's possession or control;

                                    6.6.1.11  To the extent in  Seller's  or the
         Seller's  managing  agent's  possession  or  control,  and not  already
         delivered,  (a)  the  maintenance  records  for the  Property,  (b) all
         original licenses and permits,  authorizations  and approvals which are
         currently  in force  pertaining  to the Real  Property or the  Personal
         Property, (c) the standard form of lease used in the building, together
         with a computer diskette therefor, if available, and (d) all guarantees
         and  warranties  which are  currently  in force and  which  Seller  has
         received in connection with any work or services performed or equipment
         installed in and to Improvements;






<PAGE>


                                                                              41




                                    6.6.1.12 True and complete  originals of the
         Leases and all files with  respect  thereto,  together  with  copies of
         Seller's  abstracts and other data in Seller's or the Seller's managing
         agent's  possession  necessary  for the  preparation  of bills for rent
         escalations and other Tenant charges;

                                    6.6.1.13 An  instrument  duly  executed  and
         acknowledged  by Seller,  in which Seller  assigns to Purchaser  all of
         Seller's  right,  title and  interest as landlord  in, to and under the
         Leases in the form of Exhibit F-3;

                                    6.6.1.14  To the extent in  Seller's  or the
         Seller's managing agent's  possession or control,  the originals of the
         Property Documents and in all other instances copies thereof;

                                    6.6.1.15 The Tenant  security  deposits held
         by Seller pursuant to the Leases,  including,  without limitation,  the
         Letters of Credit  listed on  Exhibit R.  Seller  will  cooperate  with
         Purchaser  to  cause  such  Letters  of  Credit  to be  transferred  to
         Purchaser as soon as possible after the Closing,  and as to any of such
         Letters of Credit which are not  transferable to Purchaser as of right,
         Seller  will take such steps as  Purchaser  may  reasonably  request to
         cause the  transfer  thereof to  Purchaser  and/or to make the proceeds
         thereof  available  to  Purchaser  following a default by the Tenant in
         question.  Any transfer  fees charged by the issuing banks shall be the
         responsibility of Purchaser.

                                    6.6.1.16  Such other and  further  customary
         instruments and documents as Seller's  counsel and Purchaser's  counsel
         may  reasonably  





<PAGE>


                                                                              42




         require to evidence and conclude the  transaction  contemplated by this
         Agreement;

                                    6.6.1.17 A duly executed Closing Statement;

                                    6.6.1.18 The amounts, if any, required to be
         paid to Purchaser pursuant to the Closing Statement; and

                                    6.6.1.19  A  counterpart  of  the  agreement
         referred to in Section 6.6.2.8.

                           6.6.2   Purchaser   shall   deliver  at  Closing  the
following items:

                                    6.6.2.1  The balance of the Purchase Price.

                                    6.6.2.2 A duly executed Closing Statement;

                                    6.6.2.3   Counterpart   copies   of  any  of
         Seller's Closing Documents which require execution by Purchaser;

                                    6.6.2.4   A   certificate   confirming   the
         continued  accuracy  of the  warranties  and  representations  made  by
         Purchaser in this Agreement as required by Section 5.3;

                                    6.6.2.5 A statement from Purchaser's counsel
         required by Section 6045 of the Internal  Revenue Code, as amended,  if
         required by law;

                                    6.6.2.6 The amounts,  if any, required to be
         paid to Seller pursuant to the Closing Statement;

                                    6.6.2.7  Such  other and  further  customary
         instruments and documents as Seller's  counsel and Purchaser's  counsel
         may  reasonably  





<PAGE>


                                                                              43



         require to evidence and conclude the  transaction  contemplated by this
         Agreement; and

                                    6.6.2.8 An agreement  in form and  substance
         reasonably  satisfactory to Seller,  permitting  Seller, at no cost, to
         store files and other items in certain agreed upon storage space in the
         basement of the Property until November 1, 1997.

                  Section 6.7  Access to Records.

                           6.7.1 Purchaser agrees that (i) all records and files
delivered to Purchaser by Seller pursuant to this Agreement will be preserved by
Purchaser,  its  successors  and  assigns,  for a  period  of  three  (3)  years
subsequent  to the Closing  and (ii) Seller may have access to such  records and
files from time to time after the Closing during normal  business hours and upon
reasonable  prior  notice to Purchaser  at the place in the  continental  United
States where such records are maintained by Purchaser.

                           6.7.2 Seller agrees that (i) Seller,  its  successors
and assigns,  will  preserve such records and files with respect to the Property
that it is not required to deliver to Purchaser on the Closing Date for a period
of three (3) years  subsequent  to the  Closing at a location in the City of New
York,  State of New York and (ii)  Purchaser may have access to such records and
files from time to time after the Closing during normal  business hours and upon
reasonable prior notice to Seller.

                  Section 6.8 Survival.  The  provisions of this Article 6 shall
survive the Closing.






<PAGE>


                                                                              44




                                    Article 7
                                    Brokerage

                  Each party  represents and warrants to the other that,  except
for the Purchaser's  Broker and the Seller's Broker, it has dealt with no broker
or finder with  respect to this  Agreement.  Each party hereby  indemnifies  and
agrees to save,  defend and hold the other party  harmless  from and against any
loss, cost, damage, claim, liability or expense, including reasonable attorneys'
fees and litigation costs, suffered or incurred as a result of its breach of the
foregoing representation and warranty. Seller shall pay any commission,  fee, or
other  charge  for  services  due to  Seller's  Broker  pursuant  to a  separate
agreement and Seller shall hold Purchaser  harmless from and against the payment
of any such amount. Purchaser shall pay any commission,  fee or other charge for
services  due  to  Purchaser's  Broker  pursuant  to a  separate  agreement  and
Purchaser  shall hold Seller  harmless  from and against the payment of any such
amount.  The  provisions of this Article 7 will survive the  termination of this
Agreement or the Closing.

                                    Article 8
                            Casualty and Condemnation

                  Section 8.1 Seller and Purchaser  waive the  provisions of all
applicable laws relating to the occurrence of a casualty or condemnation between
the date  hereof  and the  Closing,  and  Seller  and  Purchaser  agree that the
provisions of this Article 8 shall govern in lieu thereof.






<PAGE>


                                                                              45




                  Section 8.2 If the  Improvements  shall hereafter be destroyed
or damaged in whole or in part by fire or other cause,  or if the Real  Property
be taken in whole or in part by right of eminent domain or by condemnation,  the
obligations of the parties hereunder shall continue  unaffected by reason of any
such damage,  destruction  or taking and the  transaction  contemplated  by this
Agreement shall be fully consummated in accordance with the terms hereof without
any  reduction or  abatement  in the  Purchase  Price or any credit or allowance
against  the same,  except as  expressly  provided  for in  Section  8.3 and 8.4
herein. Seller covenants and agrees that it will give Purchaser prompt notice of
any casualty, condemnation or threatened condemnation.

                  Section 8.3 If prior to the Closing  Date a Material  Part (as
defined  below) of the  Improvements  is damaged or  destroyed  by fire or other
cause or a  Material  Part of the  Real  Property  is taken by right of  eminent
domain or  condemnation,  Purchaser may, by written notice given to Seller at or
prior to the Closing,  cancel this  Agreement,  whereupon this  Agreement  shall
terminate,  and  neither  party  shall have any  further  rights or  liabilities
against  or to  the  other  except  for  those  that  specifically  survive  the
termination  hereof and the parties  shall direct the Escrow Agent to return the
Earnest  Money  Deposit to  Purchaser.  For the  purposes  of this  Article 8, a
"Material  Part" shall mean (i) damage or destruction  (A) the cost of repair of
which shall exceed Two Million Dollars  ($2,000,000),  or (B) which would permit
Tenants  occupying  five  percent  (5%)  or more of the  rentable  space  in the
Improvements  to cancel their Leases,  or (ii) a taking of (A) five percent (5%)
or more of the  rentable  square  footage in the  Improvements,  or (B) a taking
which would permit  





<PAGE>


                                                                              46




Tenants  occupying  five  percent  (5%)  or more of the  rentable  space  in the
Improvements  to cancel  their  Leases,  or (C) a permanent  taking  which would
materially impede access to the Improvements.

                  Section  8.4 If prior to the  Closing  Date (i) an  immaterial
part of the  Improvements is damaged or destroyed in whole or in part by fire or
other cause,  (ii) an immaterial  part of the Real Property is taken by right of
eminent domain or by condemnation  or eminent  domain,  (iii) a Material Part of
the  Improvements  is damaged or  destroyed in whole or in part by fire or other
cause and  Purchaser  has not canceled  this  Agreement in  accordance  with the
provisions  of Section 8.3 above or (iv) a Material Part of the Real Property is
taken by eminent  domain or  condemnation  and  Purchaser  has not canceled this
Agreement  in  accordance  with  Section  8.3  above,  then  Seller  as its sole
obligation  shall (i) remit to  Purchaser an amount equal to the net proceeds of
any fire insurance and condemnation  award actually received by Seller (the term
"net  proceeds" as used in this  paragraph to mean such proceeds  reduced by (a)
the reasonable cost of collection and (b) the cost of any repairs effected by or
on  behalf  of Seller  with  Purchaser's  consent,  which  consent  shall not be
unreasonably  withheld or delayed,  or without Purchaser's consent (with respect
to repairs of an emergency  nature)) and (ii) if any such proceeds have not been
received by Seller,  transfer and assign to Purchaser,  without recourse, all of
Seller's  right,  title and interest in and to any  insurance  and  condemnation
proceeds payable to Seller, and there shall be no abatement or credit on account
of the Purchase  Price and no duty or  obligation on Seller to repair or restore
any damage or to make any  repairs by reason of such fire,  





<PAGE>


                                                                              47




casualty or taking,  except that if the amount of any such  proceeds is equal to
less than the cost to repair or  restore  any damage by reason of any such fire,
casualty or taking,  as  reasonably  determined  by Purchaser  and Seller,  then
Purchaser  shall receive at Closing a credit on account of the Purchase Price in
an amount  equal to any  deductible(s)  related  thereto.  If any such  casualty
results in a loss of rental  income which  continues  after the Closing,  Seller
will use  reasonable  efforts to assign to Purchaser its rental value  insurance
covering such loss (and an adjustment shall be made between the parties to cover
the premium for the period following the Closing); but Seller does not represent
that its insurer will honor such  assignment,  or that the proceeds  thereof for
periods after the Closing will be paid by the insurer to  Purchaser.  Adjustment
of any insurance or condemnation  claim to be paid prior to the Closing shall be
conducted jointly by Seller and Purchaser.  In the event of an assignment of all
insurance  claims as provided for above,  Purchaser  shall  receive at Closing a
credit  against the Purchase Price in an amount equal to any  deductible(s)  and
uninsured amounts.

                                    Article 9
                                    Defaults

                  Section 9.1 Purchaser's  Default.  In the event that Purchaser
defaults  under  this  Agreement  and the  Closing  does not occur as the result
thereof,  Seller  shall,  as its sole and exclusive  remedy,  retain the Earnest
Money  Deposit as liquidated  and agreed  damages for such default by Purchaser,
whereupon  neither party hereto shall have any further  obligations to the other
under this Agreement;  provided,  however,  






<PAGE>


                                                                              48



that neither party shall be released  from its  obligations  which  specifically
survive the termination of this Agreement.

                  Section 9.2 Seller's Default.  If Seller shall, as a result of
circumstances  beyond  Seller's  reasonable  control,  be unable to perform  its
obligations under this Agreement,  Purchaser's sole remedy shall be to terminate
this Agreement by notice to Seller, in which event Seller's sole  responsibility
shall be to cause the Escrow  Agent to return to  Purchaser  the  Earnest  Money
Deposit made by Purchaser  upon the execution of this  Agreement,  together with
the interest  earned thereon,  and thereupon,  both parties shall be released of
all obligations  and liability  under this  Agreement,  except for those matters
that expressly  survive any termination of this  Agreement.  The foregoing shall
not be deemed to relieve  Seller  from the  consequences  of a default by Seller
hereunder as a result of circumstances other than circumstances  beyond Seller's
reasonable  control,  in which event  Purchaser shall be entitled to seek either
(i) the return of the Earnest Money Deposit,  together with the interest  earned
thereon,  or (ii) specific  performance of the obligations of Seller  hereunder;
provided that in no event shall  Purchaser  have the right to seek money damages
for such claimed default by Seller. The rights granted Purchaser in this Section
9.2 shall be exclusive in the event of Seller's  failure or inability to perform
its obligations hereunder.

                  Section 9.3 Delivery of Earnest  Money Deposit in the Event of
a Default.  In any case where  either  party is  entitled to receive the Earnest
Money Deposit  hereunder  due to a default by the other party to this  Agreement
(or as  otherwise  provided in this  Agreement),  the parties  agree to give the
Escrow Agent 





<PAGE>


                                                                              49




prompt  written  instructions  to deliver the Earnest Money Deposit to the party
entitled thereto.

                                   Article 10
                                  Miscellaneous

                  Section 10.1  Indemnification.

                           10.1.1 Seller  agrees to  indemnify,  defend and hold
harmless  Purchaser,  its  successors  and assigns  from and against any and all
claims,  liabilities  and expenses  (including  without  limitation,  reasonable
attorneys' fees and disbursements) of any nature whatsoever suffered or incurred
by Purchaser, its successors and assigns (except for amounts for which Purchaser
received a  proration  credit  under this  Agreement)  arising out of (i) any of
Seller's  obligations,  duties or  liabilities  in connection  with the Property
prior to the Closing  Date and (ii) a breach of any of the  representations  and
warranties  which  survive the Closing  pursuant to Section 5.2,  provided  that
Purchaser  gives Seller  written  notice of any such claimed  breach  within the
period that such representation or warranty survives the Closing, as provided in
Section 5.3.

                           10.1.2 Purchaser agrees to indemnify, defend and hold
harmless Seller, its successors and assigns (except for amounts for which Seller
received a proration  credit under this  Agreement) from and against any and all
claims,  liabilities  and expenses  (including  without  limitation,  reasonable
attorneys' fees and disbursements) of any nature whatsoever suffered or incurred
by Seller, its successors or assigns arising out of (i) any obligations,  duties
or liabilities on the  Purchaser's  part 





<PAGE>


                                                                              50



to be performed in connection with the Property on and subsequent to the Closing
Date, and (ii) a breach of any  representations and warranties which survive the
Closing  pursuant to Section 5.3,  provided that Seller gives Purchaser  written
notice of any such claimed breach within the period that such  representation or
warranty survives the Closing, as provided in Section 5.2.

                  Section 10.2  Assurances Of  Cooperation.  The parties  hereby
covenant and agree that they will at any time prior to and after the Closing and
from time to time,  execute,  acknowledge and deliver, or will cause to be done,
executed,  acknowledged  and  delivered  all such further  acts,  documents  and
instruments  as may  reasonably be required by the other party in order to carry
out fully and effectuate the transactions herein contemplated in accordance with
the provisions of this Agreement.

                  Section 10.3  Successors And Assigns.  This Agreement shall be
binding  in all  respects  on and shall  inure to the  benefit of the Seller and
Purchaser and their respective successors and assigns. Seller may not assign its
interests  under this  Agreement.  Purchaser may assign its interests under this
Agreement  to an entity which  controls,  is  controlled  by, or is under common
control with, Purchaser;  provided that (i) Purchaser provides Seller with prior
notice  of  any  such   assignment  and  evidence  to   Purchaser's   reasonable
satisfaction  that  the  assignee  is in  fact  an  entity  which  controls,  is
controlled  by, or is under common  control  with,  Purchaser and (ii) that upon
Purchaser's  assignment the assignee assumes in writing,  for Seller's  benefit,
all  liabilities  of Purchaser  under this  Agreement  and  reaffirms all of the
representations  and warranties  contained in Section 5.3 hereof with respect to
the  assignee,   except  that  the   





<PAGE>


                                                                              51




representations  and warranties may be  appropriately  modified in the event the
assignee is a limited  partnership,  a limited liability company or corporation,
and a  counterpart  of such  assignment  and  assumption is delivered to Seller.
Following any such assignment made with Seller's consent, Purchaser named herein
shall be released of any further liability hereunder. This Agreement is made for
the sole and  exclusive  benefit  of the  parties  hereto  and their  respective
successors  and  assigns;  no third  party is intended to have or shall have any
rights under this Agreement.

                  Section 10.4  Interpretation.

                           10.4.1 This Agreement represents the entire agreement
between the  parties  hereto and shall not be modified or affected by any offer,
proposal,  statement or representation,  oral or written,  made by or for either
party  in  connection  with the  negotiation  of the  terms  hereof.  No  future
modification,  termination or amendment of this Agreement may be made, except by
written agreement executed by the parties hereto.

                           10.4.2 No  failure  by the  parties  hereto to insist
upon the strict  performance  of any covenant,  duty,  agreement or condition of
this  Agreement or to exercise any right or remedy upon a breach  thereof  shall
constitute  a  waiver  of any  such  right  or  remedy  or any  other  covenant,
agreement,  term or condition. Any party to this Agreement may by written notice
waive any of its rights or any conditions to its obligations  hereunder,  or any
duty, obligation or covenant of any other party hereto.

                           10.4.3  If any  provision  of this  Agreement  or the
application   thereof  to  any  person  or  circumstance  shall  be  invalid  or
unenforceable to any extent, 





<PAGE>


                                                                              52




the remainder of this  Agreement and the  application of such provision to other
persons or circumstances  shall not be affected thereby and shall be enforced to
the fullest extent permitted by law.

                           10.4.4 Use of the terms  "include,"  "including,"  or
"includes,"  followed  by  specific  examples  shall  not be deemed to limit the
object of the reference to the specific examples.

                           10.4.5 The  masculine,  feminine  or neuter  pronouns
used herein shall be interpreted  without  regard to gender,  and the use of the
singular or plural shall be deemed to include the other  whenever the context so
requires.  The  headings in this  Agreement  are  inserted  for  convenience  of
reference  only and shall not be a part of or control  or affect the  meaning of
this Agreement.

                           10.4.6 The validity,  construction and enforceability
of this Agreement  shall be governed in all respects by the laws of the State of
New York, without regard to its conflict of laws rules.

                           10.4.7 All  provisions  of this  Agreement  which are
expressly  stated to survive the Closing,  shall not merge with, be extinguished
or otherwise affected by any of the closing documents.

                  Section 10.5 Joint  Cooperation.  Upon obtaining  knowledge of
any event which could give rise to a claim of  indemnity  under this  Agreement,
the party seeking  indemnification shall promptly notify the other party of that
event.  If such claim or demand relates to a claim or demand asserted by a third
party,  the indemnifying  party shall have the right, at its expense,  to employ
counsel reasonably  





<PAGE>


                                                                              53




acceptable to the indemnified party,  except that in the case of a claim covered
by insurance,  maintained by the indemnifying  party,  counsel designated by the
insurance company of the indemnifying party shall be deemed acceptable,  and the
indemnified  party shall have the right, but not the obligation,  to participate
in the defense of any such claim or demand. So long as the indemnifying party is
defending such claim or demand in good faith, the indemnified party will pay its
own  attorney  fees for  participating  in such defense and will not settle such
claim or demand without the indemnifying  party's consent. The indemnified party
shall make available to the  indemnifying  party all records and other materials
reasonably  required by it in  contesting a claim or demand  asserted by a third
party against the indemnified  party and shall cooperate in the defense thereof.
The  parties  shall  make their  records  avail able to each other to the extent
required  to comply with any audit or other  review of a party's  records or tax
returns by a governmental agency.

                  Section 10.6  Publicity.  Neither  Purchaser  nor Seller shall
announce or disclose  publicly the terms or provisions  hereof without the prior
written  approval of the other party,  except as such disclosure may be required
by law and except  that this  provision  shall not  prohibit  either  party from
disclosing  such terms or provisions  to its  attorneys,  accountants,  lenders,
bankers,  financial  advisors,  investors  or any other  advisor or  consultant.
Neither Seller nor Purchaser shall record this Agreement or any evidence thereof
in the  public  records  of the county in which the Real  Property  is  located.
Simultaneously  with the  execution of this  Agreement,  Seller shall  deliver a
letter to Seller's  Broker and Purchaser  shall deliver a letter to  Purchaser's
Broker





<PAGE>


                                                                              54




requesting  that  each  such  Broker  not  announce  or  disclose  the  terms or
provisions hereof without the prior written approval of Seller and Purchaser and
shall  use  reasonable  efforts  to  obtain  such  agreement  from each of their
Brokers.

                  Section  10.7  Notices.  All  elections,   notices  and  other
communications  to be given  hereunder  by either party to the other shall be in
writing and sent by personal delivery,  reliable overnight courier with evidence
of  receipt,  or by  facsimile  transmission  (commonly  known as  "fax")  (with
confirmation by one of the other methods of notice), addressed:

         If to Seller:              7 West Associates LLC
                                    c/o Devon Properties
                                    One Penn Plaza - 40th Floor
                                    New York, NY  10119
                                    Attention:  Joseph R. Wenk
                                    Fax No.:  (212) 971-9283

         with a copy to
         Seller's Counsel:          Joseph E. Browdy, Esq.
                                    Paul, Weiss, Rifkind, Wharton & Garrison
                                    1285 Avenue of the Americas
                                    New York, NY  10019-6064
                                    Fax No.:  (212) 373-2042

         If to Purchaser:           Health and Retirement Properties Trust
                                    400 Centre Street
                                    Newton, MA  02158
                                    Attention:  David J. Hegarty
                                    Fax No.:  (617) 332-2261

         with a copy to
         Purchaser's
         Counsel:                   Jennifer B. Clark, Esq.
                                    Sullivan & Worcester LLP
                                    One Post Office Square
                                    Boston, MA  02109
                                    Fax No.:  (617) 338-2880






<PAGE>


                                                                              55




         If to Escrow
         Agent:                     Paul, Weiss, Rifkind, Wharton & Garrison
                                    1285 Avenue of the Americas
                                    New York, NY 10019-6064
                                    Attention:  Joseph E. Browdy, Esq.
                                    Fax No.:  (212) 373-2042

or at such other  addresses as the parties may designate to the other by written
notice in the manner herein provided. Any such notices or elections may be given
by  Seller's  or  Purchaser's  counsel and shall be  effective  upon  receipt or
refusal thereof.

                  Section 10.8  Exculpations.

                           10.8.1  The  obligations  of  Seller  under  or  with
respect to this Agreement and any instruments executed pursuant hereto shall not
constitute  personal  obligations  of Seller or its members or their  respective
directors,  officers,  employees or agents,  and shall not create or involve any
claim against, or personal liability on the part of, any of them, and Purchaser,
and anyone  claiming by,  through or under  Purchaser,  agrees to look solely to
Seller's  interest  in  the  Property  and/or  any  proceeds  arising  therefrom
(including  all payments  made with  respect to the  proceeds  from the Purchase
Price) for  satisfaction  of any liability of Seller under or in respect of this
Agreement  or any such  instruments  and will not  seek  recourse  against  such
parties,  or any of them, or any of their personal assets for such satisfaction.
The foregoing shall not be deemed to prohibit the remedy of specific performance
where expressly provided for in this Agreement.

                           10.8.2 The Declaration of Trust of Purchaser,  a copy
of which is duly filed with the  Department of  Assessments  and Taxation of the
State of  Maryland,  provides  that the name "Health and  Retirement  Properties
Trust" refers to 





<PAGE>


                                                                              56




the trustees under such Declaration of Trust  collectively as trustees,  but not
individually or personally, and that no trustee, officer, shareholder,  employee
or agent  of  Purchaser  shall be held to any  personal  liability,  jointly  or
severally,  for any  obligation  of, or claim  against,  Purchaser.  All persons
dealing with Purchaser in any way shall look only to the assets of Purchaser for
the payment of any sum or the performance of any obligation.

                           10.8.3  The  provisions  of this  Section  10.8 shall
survive the Closing or any termination of this Agreement.

                  Section 10.9  Attorney's  Fees. In the event of any litigation
between  the  parties  hereto  with  respect  to their  rights  and  obligations
hereunder,  the reasonable  attorneys' fees and costs of the party successful in
such  action  will be  borne by the  party  which  is the  losing  party in such
litigation.

                  Section 10.10 Counterparts. This Agreement may be executed and
delivered in  counterpart  copies,  all of which  together will  constitute  one
executed original agreement.






<PAGE>


                                                                              57




                  IN WITNESS  WHEREOF,  Seller and Purchaser  have executed this
Agreement as of the day and year first above written.

                                  SELLER:

                                  7 WEST ASSOCIATES LLC 

                                  By Orchid Properties, Inc., its sole member


                                          By: /s/ Robert H. Rodgers, Jr.
                                                Name: Robert H. Rodgers, Jr.
                                                Title: Vice President


                                  PURCHASER:

                                  HEALTH AND RETIREMENT PROPERTIES TRUST


                                          By: /s/ Ajay Saini
                                                Name: Ajay Saini
                                                Title: Treasurer and C.F.O.




THE UNDERSIGNED IS
SIGNING SOLELY TO
EVIDENCE ITS CONSENT
TO ACT AS ESCROW AGENT
UPON AND SUBJECT TO
THE TERMS OF SECTION 6.3
OF THIS AGREEMENT:

PAUL, WEISS, RIFKIND,
  WHARTON & GARRISON


By: /s/ Mitchell J. Berg
     Mitchell J. Berg
     Partner





<PAGE>

The schedules to this  agreement have been omitted  pursuant to Regulation  S-K,
Item  601(b)(2).  The contents of such  schedules are  identified on the List of
Exhibits  which is a part of the  agreement.  The Company  undertakes to provide
such schedules to the Securities and Exchange Commission upon request.

                                                                     Exhibit 2.2


                             CONTRIBUTION AGREEMENT
                            (and Escrow Instructions)

         THIS  CONTRIBUTION  AGREEMENT  is made and entered into as of April 20,
1997,  by and between  MEDICAL  OFFICE  BUILDINGS,  LTD., a  Washington  limited
partnership  ("Seller"),  and HEALTH AND RETIREMENT PROPERTIES TRUST, a Maryland
real estate investment trust ("Buyer").

                                 R E C I T A L S

         A.  CARLYLE REAL ESTATE  LIMITED  PARTNERSHIP  IX, an Illinois  limited
partnership  ("Carlyle"),  and Seller are the sole  partners  in  WRIGHT-CARLYLE
PARTNERS, a California general partnership  ("WCP"),  which is governed by those
certain  Articles  of  Partnership  of  Wright-Carlyle  Partnership  dated as of
December 27, 1979 (the "WCP Partnership Agreement") between Carlyle and Seller.

         B. WCP is the tenant under that  certain  Lease dated as of February 1,
1977  between  Howard  S.  Wright  Development  Co.,  a  Washington  corporation
("Wright"),  as landlord,  and Seller, as tenant, as amended by (1) that certain
First Amendment of Lease dated as of July 16, 1979 by and between The Prudential
Insurance  Company of  America,  a New  Jersey  corporation  ("Prudential"),  as
assignee of Wright, as landlord,  and Seller, as tenant; (2) that certain Second
Amendment  of  Lease  dated as of  December  19,  1985  between  Prudential,  as
landlord,  and WCP, as assignee of Seller, as tenant; and (3) that certain Third
Amendment to Lease dated as of October 1, 1996 between Prudential,  as landlord,
and  WCP,  as  tenant  (such  ground  lease  and all  amendments  thereto  being
hereinafter individually and collectively called "Ground Lease").

         C.  Prudential  is the  present  owner of the fee  interest in the real
property  which is encumbered  by the Ground Lease,  which real property is more
particularly  described  on Exhibit "A"  attached  hereto and made a part hereof
(the "Land").

         D. WCP is the  owner of an  option  to  purchase  the fee  interest  of
Prudential in the Land  pursuant to that certain  Option  Agreement  dated as of
October 1, 1996 (the "Land Option  Agreement")  between  Prudential and WCP. The
Option Agreement  requires the execution of a Purchase and Sale Agreement in the
form attached thereto as Exhibit "B" (the "Land Purchase Agreement") in order to
consummate the purchase of the Land.

         E.  On  or  about  March  20,  1997,   WCP  and  Arden  Realty  Limited
Partnership,  a Maryland limited partnership,  entered into a Purchase Agreement
and Joint Escrow Instructions (the "WCP/Arden  Agreement") pursuant to which WCP
agreed to sell the  Property  for  cash.  On or about  the date  hereof,  Seller
exercised  its  right  of  first  opportunity  under  Section  6.2D  of the  WCP
Partnership





                                                                      
                                                                      
<PAGE>



Agreement  and,  in  accordance   therewith,   Seller  will  acquire   Carlyle's
partnership  interest  in WCP (the  "Partnership  Interest")  which  acquisition
Seller intends to consummate substantially on the terms of the proposed Purchase
Agreement (the  "MOBL/Carlyle  Agreement"),  a copy of which has previously been
delivered  to Buyer.  As a  consequence  of the  exercise of such right of first
opportunity, the WCP/Arden Agreement terminates by its terms.

         F. WCP owns certain Property (as defined below).

         G. Seller and Buyer  desire,  simultaneously  upon  acquisition  of the
Partnership  Interest  by  Seller or its  nominee,  to form a  Delaware  limited
partnership ("New  Partnership"),  in which Buyer or its nominee shall hold a 1%
general  partner  interest and a 98% limited  partner  interest and Seller shall
hold a 1% limited partner interest, to which partnership Seller shall contribute
the  Property  and certain  obligations  and Buyer shall  contribute  cash,  all
subject to and upon the terms and conditions hereinafter set forth.


         NOW,  THEREFORE,  in  consideration  of the mutual  undertakings of the
parties hereto, it is hereby agreed as follows:

1.  Acquisition of the Partnership  Interest.  Seller shall acquire or cause its
nominee to acquire the Partnership  Interest subject to the Prudential Loan from
Carlyle  in  accordance  with the  MOBL/Carlyle  Agreement,  for the  purpose of
contributing  the Property to New Partnership as contemplated by this Agreement.
Seller's purchase of the Partnership  Interest shall shall be funded by Buyer as
provided in Section 2 below.

         1.1      Transfer of Property.

         Seller,  immediately following acquisition of the Partnership Interest,
shall cause WCP to  contribute to New  Partnership,  and New  Partnership  shall
acquire from Seller,  subject to all the terms and conditions hereof, all of the
following described property (collectively, the "Property"):

         (a)  Leasehold  Estate.  All of WCP's right,  title and interest in the
Ground Lease;

         (b) Land.  All of WCP's  right,  title and  interest in the Land Option
Agreement;

         (c) Improvements. All buildings, structures,  improvements and fixtures
on the Land belonging to WCP (collectively, the "Improvements");






                                        2                         DBLA-179348L.6
                                                                

<PAGE>



         (d) Easements. All easements,  interests in roadways, strips and rights
appurtenant to the Land;

         (e) Leases.  All leases and  agreements  demising space in or providing
for the use or occupancy of the Improvements (collectively, the "Leases");

         (f) Licenses.  To the extent assignable,  all of WCP's right, title and
interest in and to all  licenses,  permits,  rights,  contracts,  water  rights,
mineral rights, privileges and appurtenances pertaining to any of the foregoing;

         (g) Personal Property. All of WCP's right, title and interest in and to
all furniture, equipment, supplies, tools and machinery set forth on Exhibit "B"
attached hereto and made a part hereof,  together with all of WCP's right, title
and interest in and to any plans,  permits or drawings  located on or pertaining
to the Land or Improvements  and belonging to WCP  (collectively,  the "Personal
Property"); and

         (h) Miscellaneous Rights. All of WCP's right, title and interest in and
to any building tradenames used in connection with the Land or Improvements (but
only to the extent that the same are not  trademarks  or trade names of WCP, any
of  its  partners  or  any of its or  their  affiliated  or  related  entities),
warranties  (including  those  related to  construction  or  fabrication  of the
Improvements),  telephone  exchange numbers,  advertising  materials,  plans and
specifications,  governmental  approvals and  development  rights related to the
Land or Improvements.

         1.2      Treatment as Contribution.

         Buyer  and  Seller  intend  that  the  contribution  by  Seller  to New
Partnership  shall shall be governed by Section  721(a) of the Internal  Revenue
Code of 1986, as amended (the "Code").

2.       Consideration.

         As consideration  for the foregoing,  Buyer shall (a) contribute to New
Partnership,  on the Closing Date (as hereinafter  defined), an amount, in cash,
equal to  $47,000,000  and (b) cause  Buyer or one of its  affiliates  to make a
first  mortgage loan (the "HRPT Loan") to New  Partnership in an amount equal to
$59,000,000.  The  HRPT  Loan  shall be for a term of not  less  than 10  years,
payable  interest only at 10% per annum in monthly  installments.  Concurrently,
MOBL and some of its  constituant  partners  shall  execute  a  guaranty  of the
payment by New Partnership of the HRPT Loan, which guaranty shall be in the form
of Exhibit "C" attached  hereto (the  "Guaranty").  The HRPT Loan shall prohibit
prepayment  of  any  portion  of  the  principal  thereof  to  an  amount  below
$22,000,000, except to the extent New





                                        3                         DBLA-179348L.6
                                                                

<PAGE>



Partnership  obtains  replacement   financing  of  not  less  than  $22,000,000,
repayment of which can be guaranteed by the  Guarantees or in connection  with a
sale of the Property.

         The sums  contributed to New  Partnership  by Buyer as described  above
(the "New Partnership  Funds") shall be used to pay (i) the outstanding  balance
of principal, interest and any other sums accrued or payable on the Closing Date
under the Prudential Loan (the "Prudential  Payoff  Amount");  (ii) the Purchase
Price and the brokerage fee payable by Seller under the MOBL/Carlyle  Agreement;
(iii) the Purchase Price, as such term is used in the Land Option Agreement (the
"Land Option  Purchase  Price"),  (iv) the closing costs and (v) all  prorations
charged to Buyer or New Partnership  hereunder;  provided,  however,  that it is
expressly  understood  and agreed  that in no event shall the  aggregate  amount
advanced by Buyer  pursuant to clauses (i),  (ii),  and (iii) and closing  costs
payable by New  Partnership  pursuant  to Section  5.6 exceed  $106,000,000  and
Seller shall contribute any amounts in excess thereof required to consummate the
transactions contemplated hereby.


3.       Deposit.

         Upon the  "Opening of Escrow"  (as  hereinafter  defined),  Buyer shall
deliver by wire transfer of immediately  available federal funds an amount equal
to $1,500,000  (which  amount,  together with all interest  earned  thereon,  is
herein called the "Escrow Deposit") to Chicago Title Company/Escrow Division, at
its offices at 700 South Flower Street,  Ninth Floor,  Los Angeles,  California,
Attention:  Ms. Rose Martinez  which  company,  in its capacity as escrow holder
hereunder, is called "Escrow Holder." Such amount shall be held by Escrow Holder
as a deposit in accordance with the terms and provisions of this Agreement.  The
Escrow  Deposit shall be invested by Escrow Holder in the following  investments
("Approved  Investments"):  (i) United States Treasury obligations,  (ii) United
States  Treasury-backed  repurchase  agreements issued by a major national money
center banking institution  reasonably  acceptable to the Company, or (iii) such
other  manner as may be  reasonably  agreed to by Seller and  Buyer.  The Escrow
Deposit  shall  be  disposed  of by  Escrow  Holder  only  as  provided  in this
Agreement.

4.       Conditions Precedent.

         The obligations and liabilities of the parties hereunder are subject to
satisfaction of each of the following  conditions precedent (any of which may be
waived in  writing  by the party in whose  favor  such  condition  exists) on or
before  the  applicable  date  specified  for  satisfaction  of  the  applicable
condition.  If any of such conditions are not satisfied (or waived)  pursuant to
the terms of this Agreement, then this Agreement shall terminate





                                        4                         DBLA-179348L.6
                                                                

<PAGE>



and,  in  connection  with any such  termination  made in  accordance  with this
paragraph,  Seller  and Buyer  shall be  released  from  further  obligation  or
liability  hereunder  (except  for  those  obligations  and  liabilities  which,
pursuant to the terms of this Agreement,  survive such  termination),  and Buyer
shall be entitled to a return of the Escrow Deposit. Close of Escrow (as defined
below)  shall  constitute  approval  by each party of all  matters to which such
party has a right of approval and a waiver of all conditions.

         4.1      Title Matters.

                  4.1.1 Title Report.  A Pro forma title policy no.  6144435 X59
         dated February 10, 1997 ("Pro Forma")  covering the Property  issued by
         Chicago Title Insurance Company (such company, in its capacity as title
         insurer  hereunder,  is herein  called  the "Title  Company")  has been
         delivered to Buyer and is attached  hereto as Exhibit "D". In addition,
         Seller has  delivered  an updated  ALTA survey dated as of November 26,
         1996  ("Updated  Survey") of the Property  from Psomas and  Associates.
         Buyer has  approved  the Title  Report and the Updated  Survey with the
         changes noted in Exhibit "D" attached hereto.  Approval by Buyer of any
         additional exceptions to title or survey matters which may be disclosed
         after the date of this Agreement shall be a further condition precedent
         to Buyer's  obligation to purchase the Rights.  If any such  additional
         exceptions to title or survey matters are disclosed,  Seller shall give
         Buyer prompt written notice thereof.  Unless Buyer gives written notice
         that it  disapproves  such  additional  exceptions  to title or  survey
         matters,  stating  the  additional  exceptions  or  survey  matters  so
         disapproved,  on or before  the  earlier to occur of the  Closing  Date
         (provided  Seller has given Buyer 2 business days prior written  notice
         thereof) or 10 days after  receipt of Seller's  written  notice of such
         additional  exceptions or survey  matters  (together with copies of the
         underlying  documents  evidencing  the same),  Buyer shall be deemed to
         have approved said additional exceptions or survey matters. If, for any
         reason,  on or before the Closing Date (as defined  below)  Seller does
         not  cause  any  exceptions  to title or  survey  matters  which  Buyer
         disapproves  (to  the  extent  Buyer  is  permitted   hereunder  to  so
         disapprove) to be removed at no cost or expense to Buyer (Seller having
         the right but not the  obligation to do so),  then,  at Buyer's  option
         (exercised by giving  written  notice  thereof on or before the Closing
         Date), this Agreement shall terminate.  Notwithstanding anything to the
         contrary  contained  herein,  Seller  shall be  obligated to remove (or
         cause the Title  Company to insure over) (i) any  mechanics'  liens for
         work  performed  by or on  behalf of WCP at the  Property  prior to the
         Closing  and (ii) any tax or judgment  liens  against WCP or Seller and
         any other encumbrances which may be satisfied





                                        5                         DBLA-179348L.6
                                                                

<PAGE>



         by the payment of a liquidated sum other than the Prudential
         Loan.

                  4.1.2  Title  Policy.  It  shall  be a  condition  to  Buyer's
         obligations  to close  hereunder  that on the  Closing  Date the  Title
         Company  shall  agree  to  issue to New  Partnership  an ALTA  extended
         coverage (Form 1970) owner's title insurance policy ("Owner's  Policy")
         in the  form  (and  with  the  endorsements)  of  the  Pro  Forma  with
         amendments  provided  in Exhibit  "D" and with  liability  in an amount
         reasonably  determined  by  Buyer,  and  that  the  updated  survey  be
         certified to New Partnership.

         4.2      Due Diligence Matters

                  4.2.1 Completed Due Diligence.  Buyer acknowledges that it has
         reviewed and inspected all matters  respecting the Property,  including
         such environmental and engineering tests and reports (including a Phase
         I  environmental  audit and a structural  and curtain wall  engineering
         report) and other  inspections of the Property and review of applicable
         federal, state and local laws, ordinances, rules, regulations, permits,
         licenses, appraisals, financing documents, approvals and orders and any
         other  matters as Buyer  deemed  necessary or  appropriate  in its sole
         discretion,  in order to determine whether the Property is suitable for
         Buyer's  intended use and purpose.  By executing this Agreement,  Buyer
         hereby   acknowledges   that  Buyer  has  approved  its  due  diligence
         examinations,  reviews and  inspections and has elected to proceed with
         the  acquisition  of the Property in accordance  with the terms of this
         Agreement. Without limitation on the foregoing, Buyer acknowledges that
         the  consideration  given by Buyer hereunder has been agreed upon after
         the completion, and fully reflective of, Buyer's due diligence reviews,
         examinations and inspections.

                  4.2.2  Conduct of Due  Diligence  Reviews.  All due  diligence
         examinations,  reviews and inspections conducted by Buyer have been and
         shall  be  at  Buyer's  sole  cost  and  expense  (including,   without
         limitation,  those  related to  appraisers,  inspectors,  auditors  and
         environmental  and  engineering  consultants).  Buyer  has at all times
         conducted its due diligence and environmental reviews,  inspections and
         examinations  in a manner  so as to not  cause  damage,  loss,  cost or
         expense  to Seller,  WCP or the  Property,  and Buyer  will  indemnify,
         defend and hold Seller,  WCP and the Property harmless from and against
         any such damage, loss, cost or expense.  The foregoing  indemnification
         obligation shall survive the closing of the  transactions  contemplated
         herein  or  the  earlier   termination  of  this  Agreement  until  the
         expiration of the Survival Period (as hereinafter defined), 





                                        6                         DBLA-179348L.6
                                                                

<PAGE>



         at which  time such  obligations  (and any cause of action  not then in
         litigation)  shall  terminate.  Buyer shall promptly  deliver to Seller
         true,  accurate and complete copies of any written reports  relating to
         the Property prepared for or on behalf of Buyer by any third party and,
         in the event of termination  hereunder,  shall return all documents and
         other  materials  furnished by Seller  hereunder.  Buyer shall keep all
         information  or data received or  discovered in connection  with any of
         the inspections, reviews or examinations strictly confidential.

         4.3 Tenant  Estoppel  Certificates.  Receipt of  estoppel  certificates
("Tenant  Estoppel  Certificates")  from (i) each tenant occupying 3,000 or more
rentable  square feet  identified on Exhibit "F" attached hereto and made a part
hereof  ("Required  Tenants"),  and (ii) a sufficient number of other tenants at
the Property such that estoppel  certificates  shall have been received pursuant
to clauses (i) and (ii)  hereof  with  respect to not less than 80% of the total
net rentable  square  footage of the Property  covered by Leases in effect as of
the  Closing  Date,  shall  be a  condition  precedent  to  Buyer's  obligations
hereunder.  Each Tenant Estoppel  Certificate shall be substantially in the form
previously delivered to Buyer (or if Seller, after using commercially reasonable
efforts to obtain  certificates in such form, is unable to obtain the same, then
in the form,  if any,  prescribed  in the  applicable  Lease or other  operative
document).  Seller's sole obligation  hereunder shall be to utilize commercially
reasonable efforts to obtain such Tenant Estoppel  Certificates from each tenant
(not  including any obligation to institute  legal  proceedings or to expend any
monies  therefor).  If on or  before  the  Closing  Date such  condition  is not
satisfied (or waived),  then this Agreement shall terminate.  Without limitation
on the foregoing,  if any Tenant Estoppel Certificate discloses material adverse
matters  which are not cured or  satisfied  by Seller on or before  the  Closing
Date,  then Buyer shall have the right to terminate  this Agreement on or before
the Closing Date. All such estoppel  certificates shall be addressed to Buyer or
shall  permit  reliance  thereon by  unidentified  purchasers  and lenders  with
respect to the Property.

         4.4 Existing  Loans.  On the Closing Date, the Prudential Loan shall be
concurrently prepaid and satisfied in full.

         4.5 Land Purchase.  On the Closing Date,  concurrently with the Closing
hereunder, New Partnership shall have acquired fee title to the Land pursuant to
the Land Option Agreement.

         4.6 Guarantees.  Buyer shall have received Guarantees  substantially in
the form of Exhibit "C" attached  hereto (the  "Guarantees")  executed by Seller
and those of Seller's constituent partners who elect, in their sole and absolute
discretion, to execute the Guarantees by which the signatories





                                        7                         DBLA-179348L.6
                                                                

<PAGE>



thereto shall agree to guaranty the HRP Loan, on terms and  conditions set forth
more fully therein.

         4.7 New Partnership. Buyer and Seller shall have formed New Partnership
substantially on the terms set forth in Exhibit "E" hereto,  such partnership to
be  otherwise  on terms and  conditions  reasonably  satisfactory  to Seller and
Buyer.  New  Partnership  shall execute  supplementary  escrow  instructions  to
authorize the actions to be taken by New Partnership hereunder.

         4.8      Partnership Elections.  Seller shall cause WCP to make
the election contemplated by Section 754 of the Code.

5.       Escrow.

         On the  first  business  day after  execution  of this  Agreement,  the
parties shall deposit an executed  copy of this  Agreement (or a fully  executed
copy in  counterparts)  with  Escrow  Holder and Buyer  shall,  on the terms and
conditions  of Section 3, place the Escrow  Deposit with Escrow  Holder.  Escrow
Holder shall promptly execute this Agreement upon receipt of this Agreement (and
the Escrow  Deposit) and thereupon  escrow  hereunder  (the  "Escrow")  shall be
established  (the foregoing  being herein called the "Opening of Escrow").  This
Agreement  shall serve as the  instructions  to Escrow Holder to consummate  the
purchase and sale contemplated hereunder. Seller and Buyer agree to execute such
additional  and   supplementary   escrow   instructions  as  may  be  reasonably
appropriate to enable Escrow Holder to comply with the terms of this  Agreement.
If there is any conflict  between the  provisions of this Agreement and any such
additional or supplementary escrow instructions, then, unless such additional or
supplementary  escrow  instructions  are executed by both Seller and Buyer,  the
terms of this Agreement  shall control.  The  transactions  contemplated  herein
shall be  consummated  through the Escrow.  "Close of Escrow" shall occur on the
Closing Date.  The "Closing  Date" shall be May 30, 1997 or such earlier date as
shall be agreed  upon by  Seller  and  Buyer.  The  parties  hereto  shall  make
reasonable  best  efforts  to cause a  pre-closing  into  Escrow to occur on the
business  day  prior  to  the  Closing  Date.   The  Closing  Date  shall  occur
concurrently with the acquisiton by Seller, or its nominee,  from Carlyle of the
Partnership Interest pursuant to the MOBL/Carlyle Agreement, the contribution of
the Property to New Partnership by WCP at the request of Seller, the acquisition
by New  Partnership  from  Prudential  of the Land  pursuant  to the Land Option
Agreement, the payment in full by New Partnership of the Prudential Loan and the
making by Buyer or its affiliate of the HRP Loan to New Partnership.

         5.1 Deliveries to Escrow by Seller.  Prior to the Closing Date,  Seller
shall deliver or cause to be delivered to Escrow Holder the following:






                                        8                         DBLA-179348L.6
                                                                

<PAGE>



                  5.1.1 Two original  assignment  and  assumption  agreements in
         respect of the Ground Lease ("Leasehold Assignment"), duly executed and
         acknowledged  by WCP, in the form of Exhibit "I-1" attached  hereto and
         made a part hereof;

                  5.1.2 Two original  assignment  and  assumption  agreements in
         respect of the Land Option Agreement ("Land Option  Assignment"),  duly
         executed  by WCP,  in a form  approved  by  Seller  and Buyer and fully
         executed "Hazardous Materials Indemnity Agreements",  as defined in the
         Land Option  Agreement,  executed by Seller and Carlyle for delivery to
         Prudential;

                  5.1.3 Two bill of sale,  assignment and assumption  agreements
         ("General  Assignment"),  duly  executed by WCP, in the form of Exhibit
         "I-2" attached hereto and made a part hereof;

                  5.1.4 A duly executed and acknowledged  certificate  regarding
         the "non-foreign" status of WCP and MOBL satisfying the requirements of
         Section 1445 of the Internal Revenue Code of 1986, as amended,  and the
         regulations thereunder;

                  5.1.5 A duly executed "Withholding Exemption Certificate, Form
         590" or a  certificate  issued by the  California  Franchise Tax Board,
         pursuant to the Revenue and  Taxation  Code  Sections  18805 and 26131,
         stating either the amount of withholding  required from WCP's or MOBL's
         proceeds  or  that  WCP and  MOBL  are  exempt  from  such  withholding
         requirement;

                  5.1.6  Evidence  reasonably   satisfactory  to  Escrow  Holder
         respecting  the  due  organization  of  Seller  and  WCP  and  the  due
         authorization  and  execution  of  this  Agreement  and  the  documents
         required to be delivered hereunder;

                  5.1.7 Original Guarantees duly executed by Seller and those of
         Seller's  constituent  partners  who elect,  in their sole and absolute
         discretion, to execute the Guaranty Agreement;

                  5.1.8  Security  Deposits  attributable  to  the  leases  (the
         "Security Deposits") held by WCP;

                  5.1.9  Seller's  share  of  the  closing  costs  described  in
         paragraph 5.6





                                        9                         DBLA-179348L.6
                                                                

<PAGE>



         hereof and prorations made hereunder;

                  5.1.10 Such additional documents as may be reasonably required
         by  Escrow  Holder  or Buyer in order to  consummate  the  transactions
         hereunder  (provided the same do not materially  increase the costs to,
         or  liability  or  obligations  of,  Seller in a manner  not  otherwise
         provided for herein).

         5.2  Deliveries to Escrow by Buyer.  Prior to the Closing  Date,  Buyer
shall deliver or cause to be delivered to Escrow Holder the following:

                  5.2.1 Buyer's contribution to New Partnership and the proceeds
         of the HRPT Loan described in Section 2 hereof;

                  5.2.2 Two original  Leasehold  Assignments,  duly executed and
         acknowledged by New Partnership;

                  5.2.3  Two original Land Option Assignments, duly
         executed by New Partnership;

                  5.2.4 One original of the Note  evidencing the HRPT Loan, duly
         executed by New  Partnership and a Deed of Trust securing the HRPT Note
         (the "HRPT Deed of  Trust"),  duly  executed  and  acknowledged  by New
         Partnership;

                  5.2.5  Two original General Assignment and Assumption
         Agreements, duly executed by New Partnership;

                  5.2.6  Evidence  reasonably   satisfactory  to  Escrow  Holder
         respecting the due organization of Buyer and the due  authorization and
         execution of this Agreement and the documents  required to be delivered
         hereunder;

                  5.2.7  Buyer's  share  of  the  closing  costs   described  in
         paragraph 5.6 hereof and prorations made hereunder;

                  5.2.8 Such additional  documents as may be reasonably required
         by  Escrow  Holder  in  or to  consummate  the  transactions  hereunder
         (provided  the  same  do not  materially  increase  the  costs  to,  or
         liability or obligations  of, Buyer in a manner not otherwise  provided
         for herein).






                                        10                        DBLA-179348L.6
                                                                

<PAGE>



         5.3  Deliveries  to Buyer by  Seller.  On or before the  Closing  Date,
Seller shall deliver or cause to be delivered to Buyer the following:

                  5.3.1  A   certificate   updating  the   representations   and
         warranties  of Seller  contained  in  paragraph  7.1.2 hereof as of the
         Closing   Date  (with  any   changes   thereto   being  noted  on  such
         certificate);

                  5.3.2 Evidence reasonably satisfactory to Buyer respecting the
         due  organization  of  Seller  and WCP and  the due  authorization  and
         execution of this Agreement and the documents  required to be delivered
         hereunder  and UCC searches  confirming  that there are no  outstanding
         security interests affecting the Property;

                  5.3.3 Such additional  documents as may be reasonably required
         by Buyer in order to consummate the  transactions  hereunder  (provided
         the same do not  materially  increase  the costs to,  or  liability  or
         obligations of, Seller in a manner not otherwise provided for herein).

         5.4 Deliveries to Seller by Buyer. On or before the Closing Date, Buyer
shall deliver or cause to be delivered to Seller the following:

                  5.4.1  A   Certificate   updating  the   representations   and
         warranties of Buyer contained in paragraph 7.2 hereof as of the Closing
         Date (with any changes thereto being noted on such certificate);

                  5.4.2 Evidence  reasonably  satisfactory to Seller  respecting
         the due organization of Buyer and the due  authorization  and execution
         of this Agreement and the documents required to be delivered hereunder;
         and

                  5.4.3 Such additional  documents as may be reasonably required
         by Seller in order to consummate the transactions  hereunder  (provided
         the same do not  materially  increase  the costs to,  or  liability  or
         obligations of, Buyer in a manner not otherwise provided for herein).

         5.5 The  Closing.  Escrow  Holder shall close the Escrow on the Closing
Date by (i) causing the Leasehold Assignment to be recorded in the office of the
County Recorder of Los Angeles  County,  (ii) delivering the HRPT Note to Buyer,
(iii) delivering an amount equal to the sum of (y) the Prudential  Payoff Amount
and (z) the Land Option  Purchase  Price to  Prudential  pursuant to  Prudential
escrow  instructions,  (iv) delivering the Purchase Price under the MOBL/Carlyle
Agreement  to Carlyle,  (v)  delivering  the  brokerage  fee  payable  under the
MOBL/Carlyle  Agreement to Richard  Ellis,  LLC as directed by Seller and Buyer,
(vi)





                                        11                        DBLA-179348L.6
                                                                

<PAGE>



delivering the Security Deposits to New Partnership, (vi) delivering the Deposit
to Buyer and (vi) causing the HRPT Deed of Trust to be recorded in the office of
the  County  Recorder  of Los  Angeles  County  WHEN AND ONLY  WHEN  each of the
following conditions has been satisfied:

                  5.5.1 All documents described in paragraphs 5.1 and 5.2 hereof
         have been delivered to Escrow Holder;

                  5.5.2 Title Company is prepared to deliver to New  Partnership
         the Owner's Policy in the form (and with the  endorsements)  of the Pro
         Forma;

                  5.5.3 All conditions to the  acquisition by New Partnership of
         fee title to the Land pursuant to the Land Option  Agreement  have been
         satisfied; and

                  5.5.4  All  conditions  to  the  pay-off  and  release  of the
         Prudential Loan have been satisfied.

         5.6 Closing  Costs.  Seller shall pay  one-half of the escrow fees,  as
well as one-half of any escrow  termination  fees of Escrow Holder.  Buyer shall
pay  (i)  one-half  of the  escrow  fees,  as  well as  one-half  of any  escrow
termination  fees of Escrow Holder and (ii) all other costs and expenses related
to Buyer's  due  diligence  examinations,  reviews and  inspections  (including,
without limitation,  those related to any engineering  reports).  Subject to the
limitations set forth in Section 2, New  Partnership  shall pay (x) the transfer
tax  payable  on  recordation  of the  Leasehold  Assignment  and (y) the  title
insurance premium  attributable to the Owner's Policy.  Each party shall pay its
own legal and accounting fees.

         5.7  Prorations.  The  following  prorations  shall  be  made as of the
Closing  Date (on the  basis  of the  actual  number  of days  elapsed  over the
applicable period):

                           (i) All real estate and personal  property  taxes and
assessments  on the Property for the current  year.  In no event shall Seller be
charged  with or be  responsible  for any  increase in the taxes on the Property
resulting from the sale of the Property or from any improvements  made or leases
entered into on or after the Closing Date.

                           (ii) All  fixed  and  additional  rentals  under  the
Leases, and other tenant charges. Seller shall deliver or provide a credit in an
amount equal to all prepaid  rentals for periods  after the Closing Date and the
Security  Deposits held by WCP (to the extent not applied or forfeited  prior to
the Closing Date or delivered  into  Escrow) to New  Partnership  on the Closing
Date.  If any  security  deposits  are in the form of  certificates  of deposit,
letters of credit or the like, such instruments shall





                                        12                        DBLA-179348L.6
                                                                

<PAGE>



be assigned to New Partnership (and Seller and New Partnership  shall reasonably
cooperate in causing the transfer of the same). Rents which are delinquent as of
the Closing  Date shall not be prorated on the  Closing  Date.  New  Partnership
shall  include  such   delinquencies   in  its  normal  billing  and  shall  use
commercially  reasonable efforts to collect the same after the Closing Date (but
New  Partnership  shall not be  required to litigate or declare a default in any
Lease).  To the extent New  Partnership  receives rents (other than  "Additional
Amounts",  as hereinafter  defined) on or after the Closing Date,  such payments
shall be applied  first toward the  reasonable  third party costs of  collection
paid by New Partnership with respect thereto, next toward then current rent owed
to New  Partnership  in  connection  with the  applicable  Lease for which  such
payments are received,  and finally  toward any excess monies  received shall be
applied toward the payment of any delinquent  rents, with Seller's share thereof
being promptly delivered to Seller. New Partnership may not waive any delinquent
rents nor  modify a Lease so as to  reduce  or  otherwise  affect  amounts  owed
thereunder  for any  period in which  Seller is  entitled  to receive a share of
charges or amounts without first obtaining Seller's written consent. Common area
charges,  taxes,  operating  expense  and other  similar  expense  reimbursement
obligations of the tenants under the Leases,  as well as any percentage  payable
thereunder  (collectively,  "Additional Amounts") shall be prorated effective as
of  the  Closing  Date.  The  parties  will  finalize  such  Additional  Amounts
prorations on the Closing Date or as soon as practicable  thereafter (but in any
event not later than three (3) months  after the  Closing  Date).  Proration  of
expense items  contained in the  calculation of the Additional  Amounts shall be
made on the  basis  that  Seller  shall  be  entitled  to  reimbursement  of the
applicable  expenses incurred by Seller  (annualized or otherwise  appropriately
apportioned)  prior to the  Closing  Date.  To the  extent  that,  based on such
determinations,  Seller has received amounts in excess of the amount due Seller,
then Seller shall deliver such excess amount to Buyer on the Closing Date (or if
determined thereafter then within 15 days of such determination).  To the extent
that  Seller has  received  an amount  less than the amount so due,  Buyer shall
deliver such  shortfall  amount to Seller on the Closing Date (or if  determined
thereafter, then within 15 days of such determination). The amount of percentage
rent to be  allocated  to Seller with respect to each Tenant Lease for the lease
year ("the  "Current Lease Year") in which the Closing Date occurs shall be that
amount equal to (i) the amount by which (A) the tenant's  gross receipts (to the
extent  taken into  account in  determining  percentage  rent under such  Tenant
Lease)  for that  portion of such  Current  Lease  Year  occurring  prior to the
Closing Date exceed (B) the  "Allocable  Base  Amount",  multiplied  by (ii) the
percentage  specified  in such  Tenant  Lease  to be used  in  determining  such
tenant's  percentage  rent for such  Current  Lease Year.  The  "Allocable  Base
Amount"  means that  portion of the "Base  Amount" for such  Current  Lease Year
determined by multiplying such Base





                                        13                        DBLA-179348L.6
                                                                

<PAGE>



Amount for the entire  Current Lease Year by a fraction,  the numerator of which
is the number of days in such Current Lease Year occurring  prior to the Closing
Date and the  denominator  of which is the number of days of such Current  Lease
Year.  "Base  Amount"  is the amount  specified  in each  Tenant  Lease for such
Current  Lease Year that must be exceeded by the sales of the tenant during such
Current  Lease Year before  such tenant  shall be  obligated  thereunder  to pay
percentage rent for such Current Lease Year. Buyer shall not be obligated to pay
or credit  Seller any sum on  account of the  proration  of  percentage  rent as
aforesaid unless and until the percentage rent to be prorated as aforesaid shall
be  received  by Buyer.  Buyer  shall  reasonably  cooperate  with Seller in any
collection efforts hereunder (but shall not be required to litigate or declare a
default in any Lease).  Buyer shall notify Seller of its collection efforts from
time to time and shall not trade or exchange any such delinquent  amount for any
consideration.  With respect to  delinquent  rents,  Additional  Amounts and any
other amounts or other rights of any kind  respecting  tenants who are no longer
tenants of the Property as of the Closing  Date,  Seller shall retain all rights
relating thereto.

                           (iii) All customary  operating  expenses  incurred in
the ordinary course of management and operation of the Property.

                           (iv) It is  acknowledged  and  agreed  by Buyer  that
Buyer  shall  be  responsible  for all  tenant  improvement  costs  and  leasing
commissions  attributable  to (i) Leases  identified  as post 3/20/97  Leases on
Exhibit "O", to the extent that such costs (or the  obligation  to pay the same)
have been incurred and (ii) all other Leases  executed prior to the Closing Date
which have been approved by Buyer.

                           (v) Any interest  credit  between  April 28, 1997 and
the Close of Escrow on the Prudential Loan shall be credited to Seller.

                  (1) Calculation.  The prorations and payments shall be made on
the basis of a written statement  submitted by Seller to Buyer and Escrow Holder
two (2) days  prior to the Close of Escrow  and  shall be  subject  to Buyer and
Seller (which statement shall include a list of delinquent  rental amounts as of
the Closing Date). In the event any prorations or apportionments made under this
subsection  8.7.2 shall  prove to be  incorrect  for any reason,  then any party
shall be entitled to an adjustment to correct the same. Any item which cannot be
finally  prorated  because  of  the   unavailability  of  information  shall  be
tentatively prorated on the basis of the best data then available and reprorated
when the information is available.





                                        14                        DBLA-179348L.6
                                                                

<PAGE>




6. Condemnation or Destruction of the Property.

         In the event that, after the date hereof but prior to the Closing Date,
(i) any  material  portion of the Property is taken  pursuant to eminent  domain
proceedings or (ii) any of the Improvements are materially  damaged or destroyed
by any  casualty,  Buyer  may,  by  written  notice to  Seller,  terminate  this
Agreement;  provided,  however, that in the event this Agreement shall not be so
terminated,  all  insurance  proceeds  and/or  awards paid or payable on account
thereof  shall be  credited  to  Buyer.  If any  casualty  occurs as to which an
insurance  deductible  applies  or as to which the  proceeds  of  insurance  are
insufficient,  in Buyer's reasonable  determination,  to restore,  repair and/or
rebuild the Property, Buyer may terminate this Agreement.


7.       Representations and Warranties.

         7.1      Representations and Warranties of Seller.

                  7.1.1 General Disclaimer.  Except as specifically set forth in
         paragraph 7.1.2 hereof or elsewhere in this Agreement,  the transfer of
         the Property hereunder is and will be made on an "as is" basis, without
         representations and warranties of any kind or nature, express,  implied
         or  otherwise,  including,  but not limited to, any  representation  or
         warranty  concerning title to the Property,  the physical  condition of
         the Property (including,  but not limited to, the condition of the soil
         or  the  Property),   the  environmental   condition  of  the  Property
         (including,  but not limited to, the  presence or absence of  hazardous
         substances  on or  respecting  the  Property),  the  compliance  of the
         Property  with  applicable  laws and  regulations  (including,  but not
         limited to, zoning and building  codes or the status of  development or
         use rights respecting the Property),  the financial condition of WCP or
         any other  representation or warranty respecting any income,  expenses,
         charges,  liens or  encumbrances,  rights or claims  on,  affecting  or
         pertaining to the Property or any part thereof. Buyer acknowledges that
         Buyer has examined, reviewed and inspected all matters which in Buyer's
         judgment  bear upon the  Property  and its value  and  suitability  for
         Buyer's  purposes.  Except  as to  matters  specifically  set  forth in
         paragraph  7.1.2  hereof or  elsewhere  in this  Agreement,  Buyer will
         acquire  the  Property  solely  on the  basis of its own  physical  and
         financial examinations, reviews and inspections and the title insurance
         protection afforded by the Owner's Policy.

                  7.1.2  Limited   Representations  and  Warranties  of  Seller.
         Subject to the  provisions  of  paragraph  7.1.1 above,  Seller  hereby
         represents and warrants to Buyer as follows:





                                        15                        DBLA-179348L.6
                                                                

<PAGE>



                           (a) Organization Etc. of Seller.  Seller is a limited
                  partnership duly formed and validly existing under the laws of
                  the  State  of  Washington  and has all  requisite  power  and
                  authority to own and lease its  properties and to carry on its
                  business as presently conducted. The general partner of Seller
                  is a limited  partnership  duly  formed and  validly  existing
                  under  the  laws  of the  State  of  Washington  and  has  all
                  requisite  power and authority to own and lease its properties
                  and to carry on its business as presently conducted.

                           (b)  Organization  Etc.  of  WCP.  WCP  is a  general
                  partnership duly formed and validly existing under the laws of
                  the  State  of  California  and has all  requisite  power  and
                  authority to own and lease it  properties  and to carry on its
                  business as presently conducted.

                           (b) Authorization. Seller and its general partner has
                  all requisite  power and authority to execute and deliver this
                  Agreement  and the  other  agreements  and  instruments  to be
                  executed and delivered by it hereunder  and to consummate  the
                  transactions  contemplated hereby and thereby.  The execution,
                  delivery and  performance by Seller of this Agreement and such
                  other  agreements  and  instruments  has been duly and validly
                  authorized  by the  general  partner of  Seller,  and no other
                  action or  authorization  on behalf of Seller is  required  in
                  connection therewith.

                           (c) Validity and  Enforceability.  This Agreement has
                  been duly  authorized,  executed  and  delivered by Seller and
                  constitutes  and the other  agreements  and  instruments to be
                  executed and delivered  hereunder by Seller, when executed and
                  delivered by Seller, will constitute, legal, valid and binding
                  obligations of Seller enforceable against Seller in accordance
                  with their respective terms,  except as enforceability  may be
                  limited by bankruptcy, insolvency, reorganization,  moratorium
                  or other laws  relating to or  affecting  the  enforcement  of
                  creditors'   rights   generally   or  by   general   equitable
                  principles.

                           (d) No Conflict.  Neither the  execution and delivery
                  of this  Agreement by Seller nor the execution and delivery by
                  Seller of the other  agreements and instruments to be executed
                  and delivered by it here under,  nor the  consummation  of the
                  transactions  contemplated  hereunder or thereunder,  will (i)
                  conflict  with or  result  in a breach  or  violation  of,  or
                  constitute a default  under,  or result in the creation of any
                  lien,  charge or  encumbrance  upon,  any of the properties or
                  assets of Seller pursuant to the WCP





                                        16                        DBLA-179348L.6
                                                                

<PAGE>



                  Partnership Agreement or any indenture,  mortgage, lease, loan
                  agreement or other  agreement or instrument to which Seller is
                  a  party  or by  which  it is  bound  or to  which  any of its
                  properties  or  assets is  subject  or (ii)  violate  any law,
                  statute,  rule,  regulation,  judgment or decree applicable to
                  Seller. Since the Ground Lease will terminate upon acquisition
                  of the Land by New  Partnership,  no third party  consents are
                  required by the terms of any indenture,  mortgage, lease, loan
                  agreement or other  agreement or instrument to which Seller is
                  a  party  or by  which  it is  bound  or to  which  any of its
                  properties or assets is subject for the execution and delivery
                  of this  Agreement or any other  agreement or instrument to be
                  executed and delivered by Seller hereunder or the consummation
                  of the transactions provided for herein or therein.

                           (e) No Governmental Consent or Approval Required.  No
                  consent,  approval or  authorization  of, or declaration to or
                  filing  with,  any  governmental  or  regulatory  authority is
                  required  for the valid  execution  and  delivery by Seller of
                  this  Agreement  or any other  agreement or  instrument  to be
                  executed and delivered by Seller hereunder or the consummation
                  of the transactions provided for herein or therein.

                           (f)      Leases.

                                    (1) There are no leases,  occupancy  rights,
                  licenses,  amendments or agreements,  oral or written,  now in
                  effect with respect to occupancy at the Property, except those
                  listed on the lease summary attached as Exhibit "K" and made a
                  part  hereof  (collectively,  the  "Leases").  WCP  is  not in
                  default of any  landlord  obligations  under any  Leases  and,
                  except as  disclosed on Exhibit  "J",  WCP has  completed  all
                  tenant  improvement work required under the Leases or any work
                  letter executed by WCP in connection therewith.

                                    (2) As of the Closing  Date,  there shall be
                  no  commissions or costs for tenant  improvements  owing on or
                  with  respect to any Leases in effect as of the Closing  Date,
                  except for extensions,  options or renewals of existing Leases
                  (provided  that  said   commissions   are  set  forth  in  the
                  applicable  Lease or in  Exhibit  "K"  attached  hereto) or in
                  connection with new Leases which are approved by Buyer.

                                    (3) All of the  Leases are in full force and
                  effect and none of them has been modified or amended except as
                  set forth in Exhibit "K"; the rents set forth





                                        17                        DBLA-179348L.6
                                                                

<PAGE>



                  in  Exhibit  "K" are being  collected  on a current  basis and
                  there are no rent arrearages exceeding one month except as set
                  forth  in  Exhibit  "K"  attached  hereto;  and  there  are no
                  security deposits except as set forth in Exhibit "K".

                                    (4) Neither WCP nor Seller has sent  written
                  notice to any tenant  claiming that such tenant is in default,
                  which  default  remains  uncured,  and no action or proceeding
                  instituted against WCP or Seller by any tenant of the Property
                  is presently pending in any court.

                                    (5) Notwithstanding anything to the contrary
                  contained herein, Seller shall have no obligation or liability
                  to Buyer with respect to any of the  foregoing  matters  which
                  shall  be  confirmed   as  correct  in  any  Tenant   Estoppel
                  Certificate delivered hereunder.

                           (g)  Prudential  Matters.  WCP  is  not  in  monetary
                  default  or,  to  Seller's  knowledge,  material  non-monetary
                  default  under  the   Prudential   Loan  or  the  Land  Option
                  Agreement.

                           (h) Litigation. There is no pending (nor, to Seller's
                  knowledge,  has WCP or Seller  received any written  notice of
                  any  threatened)  action,  litigation,  condemnation  or other
                  proceeding  against the Property or against WCP or Seller with
                  respect to the Partnership Interest.

                           (i)  Compliance.  Neither WCP nor Seller has received
                  any written  notice  from any  governmental  authority  having
                  jurisdiction over the Property to the effect that the Property
                  is not in compliance with applicable laws and ordinances.

                           (j)  Service  Agreements.  Other than those which are
                  cancelable  on 30 days'  notice,  neither  WCP nor  Seller has
                  entered into any service  agreements  or  contracts  ("Service
                  Agreements") or other agreements,  oral or written (other than
                  as set forth in this Agreement) relating to the Property which
                  will be in force on the Closing  Date,  except as described in
                  Exhibit "L"  attached  hereto,  and neither WCP nor Seller has
                  received any written notice of any material default thereunder
                  that remains uncured.

                           (k)      Hazardous Substances.  Except as otherwise
                  disclosed in writing to Buyer, neither WCP nor Seller
                  has received any written notice from any governmental
                  agency or third party professional consultants that the





                                        18                        DBLA-179348L.6
                                                                

<PAGE>



                  Property  contains any Hazardous  Material which would,  as of
                  the  date  this  representation  is  made,  give  rise  to  an
                  "Environmental Claim" or "Environmental Compliance Obligation"
                  (as  hereinafter  defined).  In addition,  except as otherwise
                  disclosed in writing to Buyer,  the Property  does not contain
                  asbestos,  PCB or other  materials known to Seller to have, as
                  of the date of this  Agreement,  to have been determined to be
                  hazardous by any Governmental  Agency (other than any Excluded
                  Items) nor does the Property contain,  to Seller's  knowledge,
                  any  underground  storage tank which has not been disclosed in
                  writing to Buyer.  The term "Hazardous  Material"  means:  (I)
                  asbestos,  PCB, urea  formaldehyde,  any chemicals,  flammable
                  substances or explosive,  any radioactive materials (including
                  radon),  any hazardous wastes or substances,  any toxic wastes
                  or  substances,  or any other  materials or  pollutants  which
                  have, as of the date of this Agreement,  been determined to be
                  hazardous by any applicable Federal, state, or local law or by
                  regulations of the U.S.  Environmental  Protection Agency, the
                  U.S.  Department of Energy, the U.S.  Department of Labor, the
                  U.S. Department of Transportation,  and/or any instrumentality
                  authorized  to  regulate   materials  and  substances  in  the
                  environment   which  has   jurisdiction   over  the   Property
                  ("Environmental  Agency"),  or  (II)  any  oil,  petroleum  or
                  petroleum or petroleum derived substance, any drilling fluids,
                  produced   waters  and  other  wastes   associated   with  the
                  exploration,  development,  or production of crude oil,  which
                  materials  listed  under  items (I) and (II)  above  cause the
                  Property  to  be  in  material  violation  of  any  applicable
                  environmental  laws or the  regulations  of any  Environmental
                  Agency.  The term  "Hazardous  Material"  does not include (1)
                  motor  oil  and  gasoline   contained  in  vehicles  not  used
                  primarily for the  transport of motor oil or gasoline,  or (2)
                  materials which are stored or used in the ordinary course of a
                  tenant's  occupancy at (or Seller or Seller's managing agents'
                  operation of) the Property,  or which are stored,  used, held,
                  or  disposed  of in  compliance  with all  applicable  laws or
                  ordinance, or (3) any other materials, items and matters which
                  are present in  connection  with,  or which  otherwise  result
                  from,  the  use or  occupancy  of  the  Property  for  medical
                  purposes (it being  understood and agreed that Seller makes no
                  representations or warranties of any kind or nature respecting
                  the presence of any such medical-related  materials,  items or
                  matters). The term "Environmental Claim" means any third-party
                  claim for personal injury, death and/or property damage (other
                  than  property  damage  to  the  Property   themselves)  made,
                  asserted or prosecuted by or on behalf of any person or





                                        19                        DBLA-179348L.6
                                                                

<PAGE>



                  entity,  including,   without  limitation,   any  governmental
                  entity,  or any  present  or former  tenant,  and  arising  or
                  allegedly  arising  out of any  Hazardous  Material  which was
                  present or released in, on,  under,  or about the Property (or
                  any  part).  The term  "Environmental  Compliance  Obligation"
                  means any requirement  imposed by an  Environmental  Agency to
                  bring the Property into compliance  with  applicable  Federal,
                  state, and local laws and regulations directly relating to the
                  existence in, on, under or about the Property of any Hazardous
                  Material.

                           (l)  Insurance.  Attached  hereto as Exhibit "M" is a
                  summary of the insurance currently carried by WCP with respect
                  to the Property.

                           (m) Tax Bills.  Attached  hereto as  Exhibit  "N" are
                  copies of current tax bills with respect to the Property.

                           (n) Compliance with Law. To Seller's  knowledge,  the
                  Property  and the use and  operation  thereof does not violate
                  any material federal,  state, municipal and other governmental
                  statutes, ordinances, by-laws, rules, regulations or any other
                  legal  requirements,   including,  without  limitation,  those
                  relating  to  construction,  occupancy,  zoning,  adequacy  of
                  parking,  environmental  protection,  occupational  health and
                  safety  and fire  safety  applicable  thereto;  and  there are
                  presently in effect all material  licenses,  permits and other
                  authorizations  necessary  for the current use,  occupancy and
                  operation thereof. Neither Seller nor WCP has received written
                  notice of any  threatened  request,  application,  proceeding,
                  plan, study or effort which would materially  adversely affect
                  the  present  use or zoning  of the  Property  or which  would
                  modify or realign any adjacent street or highway.


                           (o) Seller's  Knowledge.  As used  herein,  the terms
                  "Seller's  knowledge",  "known  to  Seller"  or other  similar
                  phrases means the present actual  knowledge of Douglas Norberg
                  and Ronald  Blake (which  individuals  Seller  represents  and
                  warrants are or have been sufficiently involved and reasonably
                  familiar  with  WCP).  Such  individuals  shall  not  have any
                  personal liability in connection herewith.

         7.2  Representations  and Warranties of Buyer.  Buyer hereby represents
and warrants to Seller as follows:






                                        20                        DBLA-179348L.6
                                                                

<PAGE>



                  7.2.1  Organization,  Etc.  Buyer is a real estate  investment
         trust duly organized,  validly  existing and in good standing under the
         laws of the State of Maryland and has all requisite power and authority
         to own and  lease  its  properties  and to  carry  on its  business  as
         presently conducted.

                  7.2.2  Authorization.   Buyer  has  all  requisite  power  and
         authority  to  execute  and  deliver  this   Agreement  and  the  other
         agreements and instruments to be executed and delivered by it hereunder
         and to consummate the transactions contemplated hereby and thereby. The
         execution, delivery and performance by Buyer of this Agreement and such
         other  agreements and instruments has been duly and validly  authorized
         by the  trustees  of Buyer,  and no other  action or  authorization  on
         behalf of Buyer is required in connection therewith.

                  7.2.3  Validity and  Enforceability.  This  Agreement has been
         duly  authorized,  executed and delivered by Buyer and  constitutes and
         the other  agreements  and  instruments  to be executed  and  delivered
         hereunder  by  Buyer,  when  executed  and  delivered  by  Buyer,  will
         constitute,  legal, valid and binding  obligations of Buyer enforceable
         against  Buyer in accordance  with their  respective  terms,  except as
         enforceability    may   be   limited   by    bankruptcy,    insolvency,
         reorganization,  moratorium  or other laws relating to or affecting the
         enforcement  of  creditors'  rights  generally or by general  equitable
         principles.

                  7.2.4 No Conflict.  Neither the execution and delivery of this
         Agreement by Buyer nor the execution and delivery by Buyer of the other
         agreements  and   instruments  to  be  executed  and  delivered  by  it
         hereunder,  nor  the  consummation  of  the  transactions  contemplated
         hereunder or  thereunder,  will (i) conflict with or result in a breach
         or  violation  of,  or  constitute  a default  under,  or result in the
         creation of any material lien,  charge or encumbrance  upon, any of the
         properties or assets of Buyer or the  Declaration  of Trust of Buyer or
         any  material  indenture,  mortgage,  lease,  loan  agreement  or other
         agreement  or  instrument  to which  Buyer is a party or by which it is
         bound or to which any of its material  properties  or assets is subject
         or (ii) violate any material law, statute, rule,  regulation,  judgment
         or decree  applicable to Buyer. No third party consents are required by
         the terms of any indenture,  mortgage,  lease,  loan agreement or other
         agreement  or  instrument  to which Buyer is a party or by which any of
         them is bound or to which any of their respective  properties or assets
         is subject for the  execution  and  delivery of this  Agreement  or any
         other  agreement or  instrument  to be executed and  delivered by Buyer
         hereunder





                                        21                        DBLA-179348L.6
                                                                

<PAGE>



         or the consummation of the transactions  provided for herein or therein
         which will not be obtained prior to Closing.

                  7.2.5  No  Governmental  Consent  or  Approval  Required.   No
         consent,  approval or  authorization  of, or  declaration  to or filing
         with,  any  governmental  or  regulatory  authority is required for the
         valid  execution  and delivery by Buyer of this  Agreement or any other
         agreement or instrument to be executed and delivered by Buyer hereunder
         or the consummation of the transactions provided for herein or therein.

         7.3  Survival.  Any  cause of  action  of a party  for a breach  of the
foregoing  representations  and warranties shall survive until December 1, 1997,
at which  time  such  representations  and  warranties  (and any cause of action
resulting  from a breach  thereof not then asserted in writing or in litigation)
shall  terminate (such period ending on December 1, 1997 being herein called the
"Survival Period"). Notwithstanding the foregoing, if Buyer shall have knowledge
as of the Closing Date that any of the  representations  or warranties of Seller
contained  herein are false or inaccurate or that Seller is in breach or default
of any of its obligations under this Agreement, and Buyer nonetheless closes the
transactions  hereunder  and  acquires the  Property,  then Seller shall have no
liability or obligation  respecting such false or inaccurate  representations or
warranties  or other  breach  or  default  (and any  cause of  action  resulting
therefrom shall terminate upon such closing hereunder).

         7.4      Limitation of Liability.

                  7.4.1  Notwithstanding  anything  to  the  contrary  contained
herein,  if the closing of the  transactions  hereunder shall have occurred (and
Buyer shall not have waived,  relinquished or released any applicable  rights in
further  limitation),  the  aggregate  liability  of Seller  (and any  direct or
indirect  partner in  Seller)  arising  pursuant  to or in  connection  with the
representations,  warranties,  indemnifications,  covenants or other obligations
(whether  express or implied) of Seller  under this  Agreement  (or any document
executed or delivered in connection herewith) shall not exceed $500,000.00 (plus
up to $50,000.00 in the aggregate for legal fees and costs to the extent payable
pursuant to Section 10.10 hereof).

                  7.4.2 No constituent  partner in, or agent of Seller,  nor any
advisor,  trustee,  director,  officer,  employee,   beneficiary,   shareholder,
participant,  representative  or agent of any  corporation  or trust that is, or
becomes,  a constituent  partner in Seller and Wright Runstad Associates Limited
Partnership,  a Washington limited partnership ["WRALP"] shall have any personal
liability, directly or indirectly, under or in connection with this Agreement or
any agreement made or entered





                                        22                        DBLA-179348L.6
                                                                

<PAGE>



into under or pursuant to the provisions of this Agreement,  or any amendment or
amendments  to any of the  foregoing  made at any time or times,  heretofore  or
hereafter, and Buyer and its successors and assigns and, without limitation, all
other  persons and  entities,  shall look solely to the assets of Seller for the
payment of any claim or for any performance,  and Buyer, on behalf of itself and
its successors and assigns,  hereby waives any and all such personal  liability.
Notwithstanding  anything to the contrary  contained in this Agreement,  neither
the negative  capital  account of any  constituent  partner in Seller (or in any
other  constituent  partner of Seller),  nor any  obligation of any  constituent
partner  in WCP (or in any other  constituent  partner  of  Seller) to restore a
negative  capital  account  or to  contribute  capital  to MOBL (or to any other
constituent  partner of Seller),  shall at any time be deemed to be the property
or an asset of Seller or any such other  constituent  partner (and neither Buyer
nor any of its successors or assigns shall have any right to collect, enforce or
proceed  against  or with  respect  to any  such  negative  capital  account  of
partner's obligation to restore or contribute).

8.       Covenants.

         8.1 Interim  Covenants  of Buyer.  Until the Closing Date or the sooner
termination of this Agreement:

         8.1.1 Representations. Buyer covenants and agrees that it will not take
any action or enter into any  transaction  which would cause any  representation
contained in paragraph  7.2 of this  Agreement to be  inaccurate in any material
respect  if  remade   immediately   after  the  occurrence  of  such  action  or
transaction.

         8.2 Interim  Covenants of Seller.  Until the Closing Date or the sooner
termination of this Agreement:

                  8.2.1  Representations.  Seller  covenants  and agrees that it
         will not take any  action or enter  into any  transaction  which  would
         cause any representation contained in paragraph 7.1.2 of this Agreement
         to be inaccurate in any material  respect if remade  immediately  after
         the occurrence of such action or transaction.

                  8.2.2 Additional Actions.  Seller will use diligent efforts to
         take, or cause to be taken, all action, and to do, or cause to be done,
         all  things   necessary,   proper  or  advisable  to   consummate   the
         transactions   contemplated   by  this  Agreement  and,  in  connection
         therewith,  shall exercise all rights and remedies at law and in equity
         against any third party to the extent  available and necessary to cause
         the Closing to occur,  provided  that Buyer  shall  agree to  reimburse
         Seller the costs thereof. Seller and Buyer shall





                                        23                        DBLA-179348L.6
                                                                

<PAGE>



         consult with respect to the exercise of any such rights and remedies.

                  8.2.3  Compliance with Laws,  Etc..  Seller shall comply,  and
         cause  WCP to  comply,  in all  material  respects,  with (i) all laws,
         regulations  and other  requirements  from time to time  applicable  of
         every governmental body having  jurisdiction of the Property or the use
         or occupancy of the  Improvements  located  thereon and (ii) all terms,
         covenants and conditions of all leases,  all  instruments of record and
         any other agreements affecting the Property.

                  8.2.4 Approval of  Agreements.  Seller shall not permit WCP to
         and shall not enter into,  modify,  amend or terminate any lease or any
         other agreement with respect to the Property which would encumber or be
         binding  upon the  Property  or WCP from and  after  the  Closing  Date
         without in each instance  obtaining  the prior  written  consent of the
         Buyer.

                  8.2.5  Notice of Material  Changes or Untrue  Representations.
         Upon learning of any material  change in any condition  with respect to
         the  Property  or  of  any  event  or  circumstance   which  makes  any
         representation  or  warranty  of Seller to Buyer  under this  Agreement
         untrue or  misleading,  Seller shall  promptly to notify Buyer  thereof
         (Buyer agreeing, on learning of any such fact or condition, promptly to
         notify Seller thereof).

                  8.2.6 Operation of Property.  Seller shall continue to operate
         and  cause  WCP to  continue  to  operate  the  Property  in a good and
         businesslike  fashion consistent with their past practices and to cause
         the Property to be  maintained in good working order and condition in a
         manner consistent with past practice.

9.       Indemnification.

         9.1 By Buyer.  Buyer shall hold  harmless,  indemnify and defend Seller
from and against:  (1) any claims,  losses,  damages,  liabilities  and expenses
(including  reasonable  attorneys' fees), imposed upon or incurred in connection
with any breach of a  representation  and  warranty of Buyer  contained  in this
Agreement; (2) any and all loss, damage or third party claims in any way arising
from Buyer's  inspections or  examinations  of the Property prior to the Closing
Date;  and (3) all costs and expenses,  including  reasonable  attorneys'  fees,
incurred by Seller as a result of the foregoing.

         9.2 By Seller.  Seller shall hold harmless,  indemnify and defend Buyer
from and against:  (1) any claims,  losses,  damages,  liabilities  and expenses
(including reasonable attorneys' fees),





                                        24                        DBLA-179348L.6
                                                                

<PAGE>



imposed upon or incurred in connection with any breach of a  representation  and
warranty of Seller contained in this Agreement;  and (2) all costs and expenses,
including  reasonable  attorneys'  fees,  incurred  by Buyer as a result of such
claims. The foregoing indemnity shall not cover any matters relating to title or
marketability  of the  Property  (Buyer  relying  exclusively  upon the coverage
provided by the Owner's Policy as to such matters).

         9.3 General  Provisions.  The  indemnification  obligations  under this
Agreement shall be subject to the  limitations set forth in Section 11.4,  shall
survive the Closing and shall be subject to the following provisions:

                  9.3.1   Procedure.    The   party   seeking    indemnification
         ("Indemnitee") shall notify the other party ("Indemnitor") of any Claim
         against  Indemnitee  within  fifteen  (15)  business  days after it has
         notice of such Claim, but failure to notify Indemnitor shall in no case
         prejudice  the  rights  of  Indemnitee   under  this  Agreement  unless
         Indemnitor  shall be  prejudiced  by such  failure and then only to the
         extent  of such  prejudice.  Should  Indemnitor  fail to  discharge  or
         undertake to defend  Indemnitee  against such  liability  (with counsel
         approved by Indemnitee),  within ten (10) days after  Indemnitee  gives
         Indemnitor  written notice of the same, then Indemnitee may settle such
         Claim, and  Indemnitor's  liability to Indemnitee shall be conclusively
         established by such settlement, the amount of such liability to include
         both  the  settlement   consideration  and  the  reasonable  costs  and
         expenses,   including   attorneys'  fees,  incurred  by  Indemnitee  in
         effecting such  settlement.  Indemnitee  shall have the right to employ
         its own  counsel in any such case,  but the fees and  expenses  of such
         counsel  shall  be  at  the  expense  of  Indemnitee  unless:  (a)  the
         employment  of such counsel  shall have been  authorized  in writing by
         Indemnitor  in  connection  with  the  defense  of  such  action,   (b)
         Indemnitor  shall not have  employed  counsel to direct the  defense of
         such action,  or (c) Indemnitee  shall have  reasonably  concluded that
         there  may be  defenses  available  to it which are  different  from or
         additional to those  available to Indemnitor (in which case  Indemnitor
         shall not have the right to direct  the  defense  of such  action or of
         Indemnitee),  in any of which  events such fees and  expenses  shall be
         borne by Indemnitor.

                           9.3.2 Beneficiaries.  The indemnification obligations
         under  this  Agreement  shall  also  extend  to any  present  or future
         advisor,  trustee,   director,   officer,  partner,  member,  employee,
         beneficiary,  shareholder,  participant or agent of or in Indemnitee or
         any  entity  now or  hereafter  having a direct or  indirect  ownership
         interest in Indemnitee.






                                        25                        DBLA-179348L.6
                                                                

<PAGE>



10.      Miscellaneous.

         10.1 Brokers. Other than the engagement of Smith Barney by Seller whose
fees  shall be paid by Seller  out of escrow  and a  brokerage  fee  payable  to
Richard  Ellis,  LLP (which is to be paid  through  escrow by New  Partnership),
Seller  represents and warrants to Buyer,  and Buyer  represents and warrants to
Seller  that no  broker or  finder  has been  engaged  by it,  respectively,  in
connection with any of the transactions contemplated by this Agreement or to its
knowledge is in any way connected with any of such transactions. In the event of
a claim for broker's or finder's fee or commissions in connection herewith, then
Seller shall  indemnify and defend Buyer from the same if it shall be based upon
any statement or agreement alleged to have been made by Seller;  and Buyer shall
defend  and  indemnify  Seller  from the  same if it  shall  be  based  upon any
statement or agreement alleged to have been made by Buyer.

         10.2 Entire  Agreement.  This Agreement  contains the entire  agreement
between the parties  respecting  the matters herein set forth and supersedes all
prior  agreements  between the parties  hereto  respecting  such  matters.  This
Agreement may not be modified or amended except by written  agreement  signed by
both parties.

         10.3 Time of the Essence. Time is of the essence of this Agreement.

         10.4 Interpretation. Paragraph headings shall not be used in construing
this Agreement.  Each party acknowledges that such party and its counsel,  after
negotiation and consultation, have reviewed and revised this Agreement. As such,
the terms of this  Agreement  shall be fairly  construed  and the usual  rule of
construction,  to the effect  that any  ambiguities  herein  should be  resolved
against the drafting party,  shall not be employed in the interpretation of this
Agreement or any amendments, modifications or exhibits hereto or thereto.

         10.5 Governing Law. Except for matters  regarding the internal  affairs
of  Buyer  and  issues  of or  limitations  on  any  personal  liability  of the
shareholders  and trustees of Buyer for  obligations  of Buyer,  as to which the
laws of the State of Maryland shall govern,  this  Agreement  shall be construed
and enforced in accordance with the laws of the State of California.

         10.6  Successors  and  Assigns.  Buyer may not assign or  transfer  its
rights or obligations  under this Agreement without the prior written consent of
Seller  (in which  event such  transferee  shall  assume in  writing  all of the
transferor's  obligations  hereunder,  but such transferor shall not be released
from its obligations  hereunder)  which shall not be  unreasonably  withheld and
shall not be required for assignments or transfers





                                        26                        DBLA-179348L.6
                                                                

<PAGE>



to affiliates of Buyer. No consent given by Seller to any transfer or assignment
of Buyer's  rights or obligations  hereunder  shall be construed as a consent to
any other transfer or assignment of Buyer's rights or obligations hereunder.  No
transfer or assignment in violation of the  provisions  hereof shall be valid or
enforceable.  Subject  to the  foregoing,  this  Agreement  and  the  terms  and
provisions  hereof  shall  inure  to the  benefit  of and be  binding  upon  the
successors and assigns of the parties.

         10.7  Notices.  Any notice  which a party is  required or may desire to
give the other shall be in writing and shall be sent by personal  delivery or by
mail either (i) by United States  registered or certified  mail,  return receipt
requested,   postage  prepaid,  (ii)  by  facsimile  transmission  (followed  by
overnight  delivery  pursuant to clause  (iii)  hereafter),  or (iii) by Federal
Express or similar generally  recognized  overnight carrier regularly  providing
proof of  delivery,  addressed  as follows  (subject  to the right of a party to
designate a different address for itself by notice similarly given):


To Buyer:                             To Escrow Holder:

Health and Retirement Properties      Chicago Title Company/
Trust                                 Escrow Division
400 Centre Street                     700 South Flower Street
Newton, MA 02158                      9th Floor
Attention: David J. Hegarty,          Los Angeles, California 90017
President                             Attention: Mr. Rose Martinez
Telephone: (617) 332-3990             Telephone: (213) 488-4300
Facsimile: (617) 332-2261             Facsimile: (213) 488-3287

With Copy To:
Sullivan & Worcester LLP
One Post Office Square
Boston, MA 02109
Attn: Jennifer B. Clark, Esq.
Telephone (617) 338-2406
Facsimile: (617) 338-2880









                                        27                        DBLA-179348L.6
                                                                

<PAGE>




To Seller:

Medical Office Buildings, Ltd.
c/o Wright Runstad & Co.
1191 Second Avenue, Suite 2000
Seattle, Washington  98101-2933
Attention:  Mr. H. Jon Runstad
Telephone: (206) 223-8791
Facsimile: (206) 447-9000

With Copy To:

Dewey Ballantine
333 South Hope Street, Suite 3000
Los Angeles, California 90071
Attention:  Alan Wayte, Esq.
Telephone: (213) 617-6501
Facsimile: (213) 625-0562

Any notice so given by mail shall be deemed to have been given as of the date of
delivery  (whether  accepted or refused)  established by U.S. Post Office return
receipt or the overnight  carrier's  proof of delivery,  as the case may be. Any
such notice not so given shall be deemed  given upon  receipt of the same by the
party to whom the same is to be given.

         10.8 Third Parties.  Nothing in this  Agreement,  whether  expressed or
implied, is intended to confer any rights or remedies under or by reason of this
Agreement on any other person other than the parties hereto and their respective
successors and assigns, nor is anything in this Agreement intended to relieve or
discharge the  obligation or liability of any third persons to any party to this
Agreement,  nor shall any  provision  hereof give any third parties any right of
subrogation  or  action  over or  against  any  party  to this  Agreement.  This
Agreement  is not  intended to and does not create any third  party  beneficiary
rights whatsoever.

         10.9 ARBITRATION OF CERTAIN DISPUTES.  ANY CONTROVERSY OR CLAIM ARISING
UNDER OR RELATING TO THE TERMS OF THIS AGREEMENT OR ANY OF THE EXHIBITS ATTACHED
TO IT,  AND ANY  PROCEEDINGS  TO ENFORCE  THIS  AGREEMENT  OR RIGHTS  UNDER THIS
AGREEMENT  AND ITS EXHIBITS  OTHER THAN THE "EXCLUDED  MATTERS" (AS  HEREINAFTER
DEFINED)  SHALL  BE  SETTLED  BY  ARBITRATION  IN THE  CITY OF LOS  ANGELES,  IN
ACCORDANCE  WITH THE EXISTING RULES  ("RULES") OF PRACTICES AND PROCEDURE OF THE
JUDICIAL  ARBITRATION & MEDIATION SERVICES ("JAMS").  EACH PARTY SHALL SELECT AN
ARBITRATOR FROM THE APPROVED LIST PROVIDED BY JAMS, SUCH SELECTION TO BE MADE BY
NOTIFICATION TO THE OTHER PARTY GIVEN IN WRITING WITHIN FIFTEEN (15) DAYS OF THE
SUBMISSION OF THE DISPUTE TO ARBITRATION  HEREUNDER.  FAILURE OF A PARTY TO GIVE
NOTICE OF ITS SELECTION SHALL CAUSE THE SINGLE ARBITRATOR  SELECTED BY THE OTHER
PARTY TO





                                        28                        DBLA-179348L.6
                                                                

<PAGE>



BE THE SOLE ARBITRATOR IN CONNECTION WITH THE APPLICABLE DISPUTE  HEREUNDER.  IF
EACH PARTY  DESIGNATES AN  ARBITRATOR,  THEN WITHIN FIFTEEN (15) DAYS AFTER BOTH
ARBITRATORS HAVE BEEN SO DESIGNATED,  SUCH  ARBITRATORS  SHALL DESIGNATE A THIRD
ARBITRATOR  FROM  A  JAMS-APPROVED  LIST.  THE  DECISION  OF A  MAJORITY  OF THE
ARBITRATORS  HEREUNDER  SHALL  BE  CONCLUSIVE.  AS  SOON  AS  PRACTICABLE  AFTER
SELECTION OF THE ARBITRATOR(S),  THE ARBITRATOR(S)  SHALL DETERMINE A REASONABLE
ESTIMATE  OF THE  ANTICIPATED  FEES AND  COSTS OF THE  ARBITRATOR(S),  AND SHALL
RENDER A STATEMENT TO EACH PARTY SETTING  FORTH SAID FEES AND COSTS.  THEREAFTER
EACH PARTY  SHALL,  WITHIN TEN (10) DAYS OF RECEIPT OF SAID  STATEMENT,  DEPOSIT
ONE-HALF OF SAID SUM WITH THE  ARBITRATOR(S) TO BE APPLIED AGAINST SUCH FEES AND
COSTS  (SUBJECT TO THE  PROVISIONS OF THIS  AGREEMENT).  FAILURE OF ANY PARTY TO
MAKE SUCH DEPOSIT  SHALL RESULT IN A FORFEITURE BY THE  NON-DEPOSITING  PARTY OF
THE  RIGHT  TO  PROSECUTE  OR  DEFEND  THE  CLAIM  WHICH IS THE  SUBJECT  OF THE
ARBITRATION,  BUT  SHALL  NOT  OTHERWISE  SERVE TO ABATE,  STAY OR  SUSPEND  THE
ARBITRATION PROCEEDINGS. THE ARBITRATOR(S) SHALL HAVE THE RIGHT TO DETERMINE THE
SCOPE OF THEIR  JURISDICTION,  THE EXTENT OF  DISCOVERY  AND TO GRANT  EQUITABLE
RELIEF, INCLUDING, WITHOUT LIMITATION, THE RIGHT TO ORDER THE EXPUNGEMENT OF ANY
LIS PENDENS WHICH THE ARBITRATOR(S) DEEM IMPROPER. THE PREVAILING PARTY SHALL BE
ENTITLED TO REASONABLE  ATTORNEYS' FEES AND OTHER  REASONABLE  COSTS INCURRED IN
CONNECTION  WITH THE  ARBITRATION OR ANY OTHER  LITIGATION  PLUS INTEREST ON THE
AMOUNT OF ANY AWARD.  JUDGMENT UPON THE AWARD RENDERED BY THE  ARBITRATOR(S) MAY
BE ENTERED IN ANY COURT HAVING  JURISDICTION  THEREOF.  THIS  PARAGRAPH  MUST BE
INITIALED BELOW IN ORDER FOR THIS PARAGRAPH OF THE AGREEMENT TO BE BINDING.

         NOTICE: BY INITIALLING IN THE SPACE BELOW, YOU ARE AGREEING TO HAVE ANY
DISPUTE  ARISING OUT OF THE MATTERS  INCLUDED IN THE  "ARBITRATION  OF DISPUTES"
PROVISION DECIDED BY NEUTRAL  ARBITRATION AS PROVIDED BY CALIFORNIA LAW, AND YOU
ARE GIVING UP ANY RIGHTS YOU MIGHT  POSSESS TO HAVE THE DISPUTE  LITIGATED  IN A
COURT OR BEFORE A JURY.  BY  INITIALLING  IN THE SPACE BELOW,  YOU ARE GIVING UP
YOUR  JUDICIAL   RIGHTS  TO  DISCOVERY  AND  APPEAL,   UNLESS  SUCH  RIGHTS  ARE
SPECIFICALLY INCLUDED IN THE "ARBITRATION OF DISPUTES" PROVISION.  IF YOU REFUSE
TO SUBMIT TO ARBITRATION AFTER AGREEING TO THIS PROVISION,  YOU MAY BE COMPELLED
TO ARBITRATE UNDER THE AUTHORITY OF THE CALIFORNIA CODE OF CIVIL PROCEDURE. YOUR
AGREEMENT  TO  THIS  ARBITRATION  PROVISION  IS  VOLUNTARY.  WE  HAVE  READ  AND
UNDERSTAND THE FOREGOING AND AGREE TO SUBMIT DISPUTES ARISING OUT OF THE MATTERS
INCLUDED IN THE "ARBITRATION OF DISPUTES" PROVISION TO NEUTRAL ARBITRATION.

         BUYER'S INITIALS:                  SELLER'S INITIALS:

As used herein,  "Excluded  Matters" means any controversy,  claim or proceeding
with  respect  to  or   otherwise   related  to  a  breach  or  default  of  any
representation or warranty contained in this





                                        29                        DBLA-179348L.6
                                                                

<PAGE>



Agreement  (which  matters  shall not be subject to the  arbitration  provisions
contained herein).

         10.10  Legal  Costs.  The  parties  hereto  agree  that they  shall pay
directly any and all legal costs which they have incurred on their own behalf in
the preparation of this Agreement and all deeds and other agreements  pertaining
to this  transaction  and that such legal costs shall not be part of the closing
costs.  In  addition,  if  either  Buyer  or  Seller  brings  any  suit or other
proceeding  with  respect  to the  subject  matter  or the  enforcement  of this
Agreement,  the prevailing  party (as  determined by the court,  agency or other
authority  before which such suit or  proceeding is  commenced),  in addition to
such other  relief as may be awarded,  shall be  entitled to recover  reasonable
attorneys' fees,  expenses and costs of  investigation  actually  incurred.  The
foregoing  includes,  but is not limited to, attorneys' fees, expenses and costs
of investigation  (including,  without  limitation,  those incurred in appellate
proceedings), costs incurred in establishing the right to indemnification, or in
any action or  participation  in, or in connection  with, any case or proceeding
under Chapter 7, 11 or 13 of the Bankruptcy Code (11 United States Code Sections
101 et seq.), or any successor statutes.

         10.11 Further Instruments. Each party will, whenever (whether before or
after Closing) and as often as it shall be reasonably  requested so to do by the
other, cause to be executed,  acknowledged or delivered any and all such further
instruments  and  documents  as may be necessary  or proper,  in the  reasonable
opinion of the requesting party, in order to carry out the intent and purpose of
this Agreement (provided, however, the same do not materially increase the costs
to, or liability or obligations  of, a party in a manner not otherwise  provided
for herein). In connection therewith, at Buyer's request, upon prior arrangement
with Seller, at any time during  reasonable  business hours within two (2) years
after the Closing, Seller shall, at Buyer's cost and expense, provide to Buyer's
designated  independent  auditor,  reasonable  access to  appropriate  books and
records of Seller relating solely to the Property regarding the period for which
Buyer is required by applicable rules or regulations of the Securities  Exchange
Commission  to have audited  financial  statements  prepared with respect to the
Property,  but only to the extent  that such books and  records  are then in the
Seller's possession or control,  relate to the period during which WCP or Seller
owned the Property and are not confidential,  proprietary or privileged.  Seller
shall not make or be deemed to make any  representations  or  warranties  of any
kind  regarding  such books and  records  (including,  without  limitation,  the
accuracy or  thoroughness  thereof),  nor shall Seller have any liability of any
kind or nature with respect thereto.






                                        30                        DBLA-179348L.6
                                                                

<PAGE>



         10.12 Tax  Matters.  Seller has  obtained  or will  obtain  independent
advice on all tax  matters and agrees to hold Buyer and its  partners  and their
officers,  directors and employees  free and harmless from any tax  consequences
whatsoever  as  a  result  of  the  acquisition  of  the  Property  and  further
acknowledges that Buyer has not made any  representations  or warranties express
or implied about any tax consequences relating to this transaction.

         10.13  Counterparts.  This  Agreement  may be  executed  in one or more
counterparts,  each of which shall be deemed an original, but all of which shall
constitute one and the same agreement.

11.      DEFAULT

         11.1 Default by Seller. If Seller shall have made any representation of
warranty herein which shall be untrue or misleading in any material respect,  or
if Seller shall fail to perform any of the  material  covenants  and  agreements
contained herein to be performed by them and such failure continues for a period
of ten (10) days after  notice  thereof  from Buyer,  Buyer may  terminate  this
Agreement and/or Buyer may pursue any and all remedies available to it at law or
in equity,  including,  but not limited to, a suit for specific  performance  or
other equitable relief.

         11.2 Default by Buyer. If Buyer shall have made any  representation  or
warranty herein which shall be untrue or misleading in any material respect,  or
if Buyer shall fail to perform any of the  covenants  and  agreements  contained
herein to be performed by it and such failure shall continue for a period of ten
(10) days after notice  thereof  from Seller,  Seller may, as its sole remedy at
law and in equity,  terminate this Agreement and receive the liquidated  damages
provided in Section 11.4 hereof.

         11.3  Nonliability of Trustees.  THE DECLARATION OF TRUST  ESTABLISHING
THE  BUYER,  A  COPY  OF  WHICH,  TOGETHER  WITH  ALL  AMENDMENTS  THERETO  (THE
"DECLARATION"), IS DULY FILED WITH THE DEPARTMENT OF ASSESSMENTS AND TAXATION OF
THE STATE OF MARYLAND,  PROVIDES THAT THE NAME "HEALTH AND RETIREMENT 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  PURCHASER  SHALL BE HELD TO ANY  PERSONAL  LIABILITY,
JOINTLY OR SEVERALLY,  FOR ANY OBLIGATION OF, OR CLAIM AGAINST,  THE BUYER.  ALL
PERSONS DEALING WITH THE BUYER, IN ANY WAY, SHALL LOOK ONLY TO THE ASSETS OF THE
BUYER FOR THE PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION.

         11.4 Certain Remedies.






                                        31                        DBLA-179348L.6
                                                                

<PAGE>



         LIQUIDATED   DAMAGES  AND  DISPOSITION  OF  ESCROW   DEPOSIT.   IF  THE
TRANSACTION  HEREIN  PROVIDED SHALL NOT BE CLOSED BY REASON OF SELLER'S  DEFAULT
UNDER THIS AGREEMENT OR THE FAILURE OF SATISFACTION OF THE CONDITIONS  DESCRIBED
IN PARAGRAPH 4 HEREOF OR THE  TERMINATION OF THIS  AGREEMENT IN ACCORDANCE  WITH
PARAGRAPH 6 HEREOF,  AND BUYER SHALL NOT HAVE  DEFAULTED  UNDER THIS  AGREEMENT,
THEN THE ESCROW DEPOSIT SHALL BE RETURNED TO BUYER, AND NEITHER PARTY SHALL HAVE
ANY FURTHER  OBLIGATION  OR LIABILITY TO THE OTHER;  PROVIDED,  HOWEVER,  IF THE
TRANSACTIONS  HEREUNDER SHALL FAIL TO CLOSE BY REASON OF SELLER'S  DEFAULT,  AND
BUYER SHALL HAVE FULLY PERFORMED ITS  OBLIGATIONS  HEREUNDER AND SHALL BE READY,
WILLING AND ABLE TO CLOSE, THEN BUYER SHALL BE ENTITLED TO SPECIFICALLY  ENFORCE
THIS  AGREEMENT  (BUT NO  OTHER  ACTION,  FOR  DAMAGES  OR  OTHERWISE,  SHALL BE
PERMITTED). IN THE EVENT THE TRANSACTION HEREIN PROVIDED SHALL NOT CLOSE FOR ANY
REASON OTHER THAN THE FAILURE OF  SATISFACTION  OF THE  CONDITIONS  DESCRIBED IN
PARAGRAPH 4 HEREOF OR THE  TERMINATION  OF THIS  AGREEMENT  IN  ACCORDANCE  WITH
PARAGRAPH  6 HEREOF OR THE  DEFAULT OF  SELLER,  THEN THE SUM OF  $5,000,000  IS
HEREBY AGREED TO BE FULL  COMPENSATION AND LIQUIDATED  DAMAGES PAYABLE TO SELLER
UNDER AND IN  CONNECTION  WITH THIS  AGREEMENT  AND THE DEPOSIT SHALL BE PAID TO
SELLER AS PARTIAL  PAYMENT OF SUCH SUM. IN CONNECTION  WITH THE  FOREGOING,  THE
PARTIES  RECOGNIZE  THAT  SELLER  WILL  INCUR  EXPENSE  IN  CONNECTION  WITH THE
TRANSACTION CONTEMPLATED BY THIS AGREEMENT AND THAT THE PROPERTY WILL BE REMOVED
FROM THE MARKET AND SELLER WILL BE EXPOSED TO DAMAGES TO THIRD PARTIES. FURTHER,
THAT IT IS EXTREMELY  DIFFICULT  AND  IMPRACTICABLE  TO ASCERTAIN  THE EXTENT OF
DETRIMENT TO SELLER  CAUSED BY THE BREACH BY BUYER UNDER THIS  AGREEMENT AND THE
FAILURE OR THE CONSUMMATION OF THE TRANSACTION CONTEMPLATED BY THIS AGREEMENT OR
THE AMOUNT OF  COMPENSATION  SELLER SHOULD RECEIVE AS A RESULT OF BUYER'S BREACH
OR DEFAULT.  IN THE EVENT THE SALE OF THE PROPERTY  SHALL NOT BE  CONSUMMATED ON
ACCOUNT OF BUYER'S  DEFAULT,  THEN THE SUM OF  $5,000,000,  INCLUDING THE ESCROW
DEPOSIT,  SHALL BE SELLER'S SOLE AND EXCLUSIVE  DAMAGES UNDER THIS  AGREEMENT BY
REASON OF SUCH DEFAULT.



Seller's Initials                                    Buyer's Initials

         11.5 Confidentiality.

         No partner, principal,  employee, partner or affiliate of Seller or WCP
shall trade in the shares of Buyer until public announcement of this transaction
has been made. Seller shall not make any public announcement of the transactions
contemplated  by this  Agreement or otherwise  disclose this  transaction to any
third party without the prior written consent of Buyer.






                                        32                        DBLA-179348L.6
                                                                

<PAGE>




         IN WITNESS WHEREOF,  the parties hereto have executed this Contribution
Agreement as of the date first above written.

SELLER:                            MEDICAL OFFICES BUILDINGS, LTD., a Washington
                                   limited partnership

                                   BY:     WRIGHT RUNSTAD ASSOCIATES LIMITED
                                           PARTNERSHIP, a Washington limited
                                           partnership
                                           Its General Partner

                                           BY:      WRIGHT RUNSTAD & COMPANY, a
                                                    Washington corporation
                                                    Its General Partner



                                           By: /s/ H.J. Runstad
                                           Name: H.J. Runstad
                                           Title: Chairman and C.E.O.


BUYER:                             HEALTH AND RETIREMENT PROPERTIES TRUST, a
                                   Maryland real estate investment trust



                                   By: /s/ Ajay Saini
                                   Name: Ajay Saini
                                   Title: Treasurer and C.F.O.







                                        33                        DBLA-179348L.6
                                                                

<PAGE>




                         ESCROW HOLDER'S ACKNOWLEDGEMENT


         The undersigned  hereby executes this Exchange Agreement to evidence is
agreement  to act as  Escrow  Holder  in  accordance  with  the  terms  of  this
Agreement.

Date: ____________, 1997            CHICAGO TITLE INSURANCE
                                    COMPANY, a Missouri corporation

                                    By:_______________________________
                                    Name:_____________________________
                                    Title:____________________________






                                        34                        DBLA-179348L.6
                                                                

<PAGE>




                                  EXHIBIT LIST



                  "A"               - Property Description

                  "B"               - List of Personal Property

                  "C"               - Form of Guaranty

                  "D"               - Pro Forma Title Policy

                  "E"               - Memorandum Regarding New Partnership
                                      Agreement

                  "F"               - Required Tenants List

                  "G"               - Intentionally Deleted

                  "H"               - Intentionally Deleted

                  "I-1"             - Leasehold Assignment

                  "I-2"             - General Assignment

                  "J"               - Exception List to Seller's Representations

                  "K"               - List of Leases

                  "L"               - Service Agreements

                  "M"               - Current Insurance

                  "N"               - Tax Bills

                  "O"               - Lease Commissions and Tenant Improvement
                                      Costs







                                        35                        DBLA-179348L.6
                                                                

<PAGE>


The schedules to this  agreement have been omitted  pursuant to Regulation  S-K,
Item  601(b)(2).  The contents of such  schedules are  identified on the List of
Exhibits  which is a part of the  agreement.  The Company  undertakes to provide
such schedules to the Securities and Exchange Commission upon request.


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