EXHIBIT 1.6


















                               SNH CAPITAL TRUST I


                       10.125% Trust Preferred Securities,
             guaranteed to the extent set forth in the Guarantee by

                         Senior Housing Properties Trust


                             UNDERWRITING AGREEMENT








June 18, 2001







                             UNDERWRITING AGREEMENT


                                                                   June 18, 2001



UBS Warburg LLC
Salomon Smith Barney Inc.
A.G. Edwards & Sons, Inc.
First Union Securities, Inc.
Prudential Securities Incorporated
Credit Suisse First Boston Corporation
Tucker Anthony Incorporated
as Representatives of the several Underwriters

c/o UBS Warburg LLC
299 Park Avenue
New York, New York  10171-0026


Ladies and Gentlemen:

                  SNH Capital Trust I, a statutory  business trust created under
the laws of the State of Maryland (the "Trust"),  SNH Capital Trust Holdings,  a
statutory  trust created under the laws of the State of Maryland,  as sponsor of
the Trust (the  "Sponsor")  and Senior Housing  Properties  Trust, a real estate
investment trust formed and existing under the laws of the State of Maryland, as
guarantor (the "Company" and, together with the Trust, the "Offerors"), propose,
subject to the terms and conditions stated herein, that the Trust issue and sell
to the Underwriters named in Schedule A hereto (the "Underwriters") an aggregate
of  $25,000,000   liquidation  amount  of  10.125%  Trust  Preferred  Securities
(liquidation  amount  $25.00  per  preferred  security)  representing  undivided
beneficial   interests  in  the  assets  of  the  Trust  (the  "Trust  Preferred
Securities"),  guaranteed by the Company as to the payment of distributions, and
as to  payments  on  liquidation  or  redemption,  to the  extent set forth in a
guarantee  agreement (the  "Guarantee")  among the Company and State Street Bank
and Trust Company, as trustee (the "Guarantee Trustee") (the "Firm Securities").
In addition,  solely for the purpose of covering  over-allotments,  the Offerors
propose to grant to the  Underwriters the option to purchase up to an additional
150,000 Trust  Preferred  Securities  (the  "Additional  Securities").  The Firm
Securities and the Additional Securities are hereinafter  collectively sometimes
referred to as the "Securities."




                  The proceeds of the sale of the Securities and an aggregate of
$773,200 liquidation amount of the Trust's Common Securities (liquidation amount
$25.00 per common security) (the "Common  Securities") are to be invested by the
Trust  in  10.125%  Junior  Subordinated  Debentures  due  June  15,  2041  (the
"Subordinated  Debentures")  of the  Company to be issued  pursuant  to a Junior
Subordinated  Indenture,  to be dated as of June 21, 2001, among the Company and
State Street Bank and Trust Company, as trustee (the "Debenture Trustee").

                  The Company has  prepared  and filed with the  Securities  and
Exchange  Commission (the "Commission") in accordance with the provisions of the
Securities  Act of 1933,  as  amended,  and the  rules  and  regulations  of the
Commission thereunder (collectively,  the "Act"), a registration statement (file
number  333-60392)  on Form S-3  under the Act (the  "registration  statement"),
including,  among other  things,  a prospectus  relating to, among other things,
common shares of beneficial  interest,  preferred shares of beneficial interest,
depository shares, guarantees,  debt securities and warrants for such securities
of the Company and  preferred  securities of the Trust,  and such  amendments to
such  registration  statement as may have been required prior to the date hereof
have been  similarly  prepared  and have been  filed with the  Commission.  Such
registration  statement,  as  so  amended,  and  any  post-effective  amendments
thereto,  have been declared by the  Commission  to be effective  under the Act.
Such registration  statement, as amended at the date of this Agreement meets the
requirements  set  forth in Rule  415(a)(1)(x)  under the Act  ("Rule  415") and
complies in all other  material  respects with said Rule.  The Company will next
file  with  the  Commission  pursuant  to  Rule  424(b)  under  the  Act a final
prospectus  supplement  to the basic  prospectus  included in such  registration
statement, as so amended, describing the Securities and the offering thereof, in
such  form as has been  provided  to or  discussed  with,  and  approved  by the
Underwriters.

                  The term  "Registration  Statement" as used in this  Agreement
means the registration statement, as amended at the time it became effective, as
supplemented or amended prior to the execution of this Agreement,  including (i)
all financial schedules and exhibits thereto and (ii) all documents incorporated
by  reference  or deemed  to be  incorporated  by  reference  therein.  If it is
contemplated,  at the time this  Agreement  is executed,  that a  post-effective
amendment  to the  registration  statement  will be filed  and must be  declared
effective  before  the  offering  of  the  Securities  may  commence,  the  term
"Registration  Statement"  as used  in this  Agreement  means  the  registration
statement  as  amended  by  said  post-effective  amendment.  If an  abbreviated
registration  statement is prepared and filed with the  Commission in accordance
with Rule 462(b) under the Act (an "Abbreviated  Registration  Statement"),  the
term "Registration  Statement" includes the Abbreviated  Registration Statement.
The term "Basic Prospectus" as used in this Agreement means the prospectus dated
May 21, 2001 forming a part of the Registration Statement.  The term "Prepricing
Prospectus" as used in this Agreement means the Basic  Prospectus  together with
any  preliminary  form of  prospectus  supplement  specifically  relating to the
Securities,  in the form first filed  with,  or

                                       2


transmitted for filing to, the Commission  pursuant to Rule 424 of the Rules and
Regulations.  The term  "Prospectus  Supplement" as used in this Agreement means
the  prospectus  supplement  dated June 18,  2001  specifically  relating to the
Securities,  in the form first filed  with,  or  transmitted  for filing to, the
Commission  pursuant to Rule 424 under the Act. The term "Prospectus" as used in
this  Agreement  means  the  Basic  Prospectus   together  with  the  Prospectus
Supplement except that if such Basic Prospectus is amended or supplemented on or
prior to the date on which the Prospectus Supplement was first filed pursuant to
Rule  424,  the term  "Prospectus"  shall  refer to the Basic  Prospectus  as so
amended or supplemented  and as supplemented by the Prospectus  Supplement.  Any
reference in this  Agreement to the  registration  statement,  the  Registration
Statement,  the Basic  Prospectus,  any  Prepricing  Prospectus,  the Prospectus
Supplement  or the  Prospectus  shall be  deemed  to refer  to and  include  the
documents  incorporated  by  reference  therein  pursuant to Item 12 of Form S-3
under the Act, as of the date of the  registration  statement,  the Registration
Statement,  the Basic  Prospectus,  such Prepricing  Prospectus,  the Prospectus
Supplement  or the  Prospectus,  as the case may be,  and any  reference  to any
amendment  or  supplement  to  the  registration  statement,   the  Registration
Statement,  the Basic  Prospectus,  any  Prepricing  Prospectus,  the Prospectus
Supplement  or the  Prospectus  shall be  deemed  to refer  to and  include  any
documents  filed after such date under the  Securities  Exchange Act of 1934, as
amended,   and  the  rules  and   regulations  of  the   Commission   thereunder
(collectively,  the "Exchange  Act") which,  upon filing,  are  incorporated  by
reference therein,  as required by paragraph (b) of Item 12 of Form S-3. As used
herein, the term "Incorporated  Documents" means the documents which at the time
are  incorporated by reference in the registration  statement,  the Registration
Statement,  the Basic  Prospectus,  any  Prepricing  Prospectus,  the Prospectus
Supplement, the Prospectus, or any amendment or supplement thereto.

                  The Offerors and the Underwriters agree as follows:

                  1. Sale and Purchase.  On the basis of the representations and
warranties  herein and subject to the terms and conditions herein set forth, the
Trust  agrees  to issue  and sell to each of the  Underwriters,  and each of the
Underwriters agrees, severally and not jointly, to purchase from the Trust, at a
price of $25.00 per Security  that number of Securities  set forth  opposite the
name of such Underwriter in Schedule A hereto.

                  2. Payment and Delivery.  As compensation to the  Underwriters
for their  commitments  hereunder,  and in view of the fact that the proceeds of
the  sale  of  the  Securities  will  be  used  by the  Trust  to  purchase  the
Subordinated  Debentures of the Company, the Company hereby agrees to pay at the
time of purchase (as defined below) to UBS Warburg LLC ("UBS Warburg"),  for the
accounts of the several  Underwriters,  a commission of $0.7875 per Security for
the  Securities  to be  delivered  at the time of purchase  by wire  transfer of
federal  (same-day)  funds.  The total  aggregate  amount  of the  Underwriters'
compensation is $787,500.


                                       3


                  In  addition,   the  Offerors  hereby  grant  to  the  several
Underwriters the option to purchase,  and upon the basis of the representations,
warranties  and  agreements  of the  Offerors  and  subject to all the terms and
conditions herein set forth, the Underwriters  shall have the right to purchase,
severally and not jointly, from the Trust, ratably in accordance with the number
of Firm  Securities to be purchased by each of them (subject to such  adjustment
as you shall  determine  to avoid  fractional  shares),  all or a portion of the
Additional  Securities  as may be  necessary  to cover  over-allotments  made in
connection with the offering of the Firm Securities,  at the same purchase price
per share to be paid by the  Underwriters to the Trust for the Firm  Securities.
This option may be exercised by you on behalf of the several Underwriters at any
time (but not more than once) on or before the  thirtieth day following the date
hereof,  by written  notice to the  Offerors.  Such  notice  shall set forth the
aggregate  number  of  Additional  Securities  as to which  the  option is being
exercised,  and the date  and time  when  the  Additional  Securities  are to be
delivered (such date and time being herein  referred to as the "additional  time
of purchase"); provided, however, that the additional time of purchase shall not
be earlier  than the time of purchase  (as defined  below) nor earlier  than the
second  business  day1  after  the date on which  the  option  shall  have  been
exercised  nor  later  than the tenth  business  day after the date on which the
option shall have been exercised. The number of Additional Securities to be sold
to each  Underwriter  shall be the number which bears the same proportion to the
aggregate number of Additional  Securities being purchased as the number of Firm
Securities set forth opposite the name of such  Underwriter on Schedule A hereto
bears to the total number of Firm  Securities  (subject,  in each case,  to such
adjustment as you may determine to eliminate fractional shares).

                  The Securities to be purchased by each  Underwriter  hereunder
will be represented by one or more definitive global  certificates in book-entry
form which will be  deposited  by or on behalf of the Trust with The  Depository
Trust Company  ("DTC") or its designated  custodian.  The Trust will deliver the
Securities to UBS Warburg, for the account of each Underwriter,  against payment
by or on behalf of such  Underwriter  of the  purchase  price  therefor  by wire
transfer of federal (same day) funds to a commercial bank account located in the
United States and designated in writing at least  forty-eight hours prior to the
time of  purchase by the  Company to UBS  Warburg,  by causing DTC to credit the
Securities  to the  account  of UBS  Warburg.  The Trust  will  cause the global
certificates representing the Securities to be made available to UBS Warburg for
checking  at  least  twenty-four  hours  prior to the  time of  purchase  or the
additional  time of  purchase,  as the  case  may be.  The time and date of such
delivery and payment shall be 9:30 a.m., New York City time, on June 21, 2001

- ------
1        As used  herein  "business  day" shall mean a day on which the New York
         Stock Exchange is open for trading.


                                       4


or such other time and date as UBS  Warburg  and the  Company  may agree upon in
writing. Such time and date are herein called the "time of purchase".

                  The  documents  to be delivered at the time of purchase and at
the  additional  time of  purchase,  as the case may be,  by or on behalf of the
parties hereto pursuant to Section 6 hereof,  will be delivered at such time and
date at the offices of Dewey  Ballantine  LLP, 1301 Avenue of the Americas,  New
York,  New York 10019 or such other  location as UBS Warburg and the Company may
agree in writing  (the  "Closing  Location"),  and the Firm  Securities  and the
Additional  Securities  will be  delivered,  at the time of purchase  and at the
additional time of purchase, as the case may be.

                  3.  Representations  and  Warranties  of  the  Offerors.   The
Offerors jointly and severally represent and warrant to each of the Underwriters
that:

                  (a) No order  preventing  or  suspending  the use of the Basic
         Prospectus, any Prepricing Prospectus, the Prospectus Supplement or the
         Prospectus is in effect and no proceedings for such purpose are pending
         or, to the knowledge of the Offerors,  threatened by the  Commission or
         the  securities  authority  of any  state  or other  jurisdiction.  The
         Registration  Statement  has become  effective  under the Act;  no stop
         order suspending the effectiveness of the Registration  Statement is in
         effect,  and no proceedings  for such purpose are pending before or, to
         the  knowledge of the  Offerors,  threatened  by the  Commission or the
         securities authority of any state or other jurisdiction.

                  (b) (i) The  Offerors  are  eligible  to use  Form S-3 and the
         offering of the Securities  complies with the requirements of Rule 415,
         (ii) each part of the  Registration  Statement,  when such part  became
         effective,   complied  in  all  material   respects   with   applicable
         requirements  of the Act, the Exchange Act and the Trust  Indenture Act
         of 1939,  as amended (the "TIA"),  (iii) each part of the  Registration
         Statement,  when such part became  effective,  did not contain and each
         such part, as may be amended or supplemented,  if applicable,  will not
         contain  any untrue  statement  of a  material  fact or omit to state a
         material  fact  required to be stated  therein or necessary to make the
         statements therein not misleading, (iv) the Registration Statement, any
         Abbreviated   Registration   Statement,   the  Basic  Prospectus,   any
         Prepricing  Prospectus,  the  Prospectus  Supplement and the Prospectus
         comply  and, as may be amended or  supplemented,  if  applicable,  will
         comply in all material  respects with the Act, the Exchange Act and the
         TIA (v) the  Prospectus  does not  contain  and,  as may be  amended or
         supplemented, if applicable, will not contain any untrue statement of a
         material  fact or omit to state a material  fact  necessary to make the
         statements  therein, in the light of the circumstances under which they
         were  made,  not  misleading,   except  that  the  representations  and
         warranties  set forth in this  paragraph (b) do not apply to statements
         or omissions in the Registration Statement, the Basic


                                       5


         Prospectus,  any Prepricing  Prospectus,  the Prospectus Supplement and
         the  Prospectus  based upon  information  relating  to any  Underwriter
         furnished to the Offerors by such Underwriter through you expressly for
         use therein.

                  (c) The Incorporated Documents,  when they were filed with the
         Commission,  conformed in all material  respects to the requirements of
         the Exchange Act, and none of such documents, when they were filed with
         the  Commission,  contained an untrue  statement of a material  fact or
         omitted  to state a  material  fact  necessary  to make the  statements
         therein  not  misleading;  and  any  further  documents  so  filed  and
         incorporated by reference in (a) the Registration Statement,  when such
         documents are filed with the  Commission,  will conform in all material
         respects to the  requirements  of the Exchange Act, as applicable,  and
         will not  contain an untrue  statement  of a  material  fact or omit to
         state a material  fact  necessary  to make the  statements  therein not
         misleading, and (b) the Prospectus,  when such documents are filed with
         the  Commission,   will  conform  in  all  material   respects  to  the
         requirements  of the Exchange Act, as applicable,  and will not contain
         an untrue statement of a material fact or omit to state a material fact
         necessary  to  make  the  statements  therein,  in  the  light  of  the
         circumstances in which they were made, not misleading.

                  (d) The  Trust  has been  duly  formed  and is  existing  as a
         business  trust  in  good  standing  under  the  laws of the  State  of
         Maryland,  with full power to own, lease and operate its properties and
         conduct its business as described in the Registration Statement and the
         Trust will be  classified as a grantor trust and will not be classified
         as an  association  taxable as a corporation  for United States federal
         income tax purposes.

                  (e) The Company has been duly formed and is existing and is in
         good standing  under the laws of the State of Maryland,  with the trust
         power to own, lease and operate its properties and conduct its business
         as described in the Registration Statement.

                  (f) The Company is duly  qualified to do business as a foreign
         corporation  and is in good standing in each  jurisdiction in which the
         ownership  or  leasing  of its  properties  or the  carrying  on of its
         business  requires such  qualification,  except where the failure to so
         qualify  in any such  jurisdiction  would  not  individually  or in the
         aggregate have a material  adverse  effect on the business,  prospects,
         properties,  condition (financial or otherwise) or results of operation
         of the Company and the  Subsidiaries  (as defined  herein),  taken as a
         whole (a "Material Adverse Effect").

                  (g)  The  Company  has  no   subsidiaries   other  than  those
         identified  in Schedule B hereto  (collectively,  the  "Subsidiaries").
         Other than the  Subsidiaries,  the  Company  does not own,  directly or
         indirectly,  any shares of stock or any other equity


                                       6


         or  long-term  debt of any  other  corporation  or have any  direct  or
         indirect  equity  interest or ownership of long-term  debt in any firm,
         partnership,  joint venture, limited liability company,  association or
         other   entity,   except  for  HRPT   Properties   Trust  and  Marriott
         International,  Inc.  Each  Subsidiary  has been duly  incorporated  or
         formed and is existing as a corporation  or other  entity,  as the case
         may be,  in good  standing  under the laws of the  jurisdiction  of its
         incorporation  or  organization,  with the requisite  corporate  trust,
         partnership  or other power to acquire  and own,  lease and operate its
         properties   and  to  conduct  its   business,   as  described  in  the
         Registration Statement and the Prospectus;  and each Subsidiary is duly
         qualified and in good standing to do business in each  jurisdiction  in
         which the nature of its  business  or the  ownership  or leasing of the
         property requires such qualification, except where the failure to be so
         qualified would not have a Material Adverse Effect.

                  (h) This  Agreement  has been duly  authorized,  executed  and
         delivered by the Offerors.

                  (i)  The   Securities   have  been  duly   authorized  in  the
         Declaration (as defined below), and, when issued and delivered pursuant
         to this Agreement,  such Securities will be validly issued and, subject
         to the  qualifications  set forth below,  fully paid and non-assessable
         undivided  beneficial  interests in the assets of the Trust entitled to
         the benefits provided by the Amended and Restated  Declaration of Trust
         of SNH Capital  Trust I (the  "Declaration")  among the Sponsor and the
         Trustees  named therein (the  "Trustees")  (subject to the terms of the
         Declaration);   provided  that  the  holders  of  the  Securities  (the
         "Securityholders")  may be obligated,  pursuant to the Declaration,  to
         (a) provide  indemnity and/or security in connection with and pay taxes
         or  governmental  charges  arising from transfers of Securities and (b)
         provide  security  and  indemnity  in  connection  with  requests of or
         directions to the Property  Trustee (as defined in the  Declaration) to
         exercise  its  rights  and  remedies  under  the  Declaration;  and the
         Securities  conform  to  the  description   thereof  contained  in  the
         Prospectus.

                  (j) The Common  Securities  have been duly  authorized  in the
         Declaration,  and upon  delivery  by the Trust to the  Company  against
         payment  therefor  as set  forth in the  Declaration,  will be  validly
         issued  undivided  beneficial  interests in the assets of the Trust and
         conform to the description  thereof  contained in the  Prospectus;  the
         issuance of the Common Securities is not subject to preemptive or other
         similar rights;  and at the time of purchase and at the additional time
         of  purchase,  as the case may be, all of the  issued  and  outstanding
         Common  Securities will be directly or indirectly owned by the Company,
         free and  clear  of any  security  interest,  mortgage,  pledge,  lien,
         encumbrance, claim or equity.

                  (k)  The   Securityholders   will  be  entitled  to  the  same
         limitation of personal  liability  extended to  stockholders of private
         corporations for profit organized under


                                       7


         Title 2 of the Maryland  General  Corporation  Law;  provided  that the
         holders  of  the   Securities   may  be  obligated,   pursuant  to  the
         Declaration,  to (a) provide  indemnity  and/or  security in connection
         with and pay taxes or  governmental  charges  arising from transfers of
         Securities  and (b) provide  security and indemnity in connection  with
         requests of or  directions  to the Property  Trustee (as defined in the
         Declaration) to exercise its rights and remedies under the Declaration;
         and the Securities conform to the description  thereof contained in the
         Prospectus.

                  (l)  The  Guarantee,   the   Declaration,   the   Subordinated
         Debentures  and the Indenture  (the  Guarantee,  the  Declaration,  the
         Subordinated  Debentures and the Indenture being collectively  referred
         to as the "Company  Agreements")  have each been duly authorized by the
         Company  and/or  the  Sponsor,  as the  case may be,  and when  validly
         executed and delivered by the Company  and/or the Sponsor,  as the case
         may be, and, in the case of the Guarantee, by the Guarantee Trustee, in
         the case of the  Declaration,  by the Trustees  and, in the case of the
         Indenture,   by  the  Debenture  Trustee,  and,  in  the  case  of  the
         Subordinated   Debentures,   when   issued  by  the  Company  and  duly
         authenticated  and delivered by the  Debenture  Trustee and paid for by
         the Trust, will constitute valid and legally binding obligations of the
         Company  and/or  the  Sponsor,  as the  case  may  be,  enforceable  in
         accordance with their respective terms, subject, as to enforcement,  to
         bankruptcy,  insolvency,  reorganization  and  other  laws  of  general
         applicability relating to or affecting creditors' rights and to general
         equity  principles   (regardless  of  whether  such  enforceability  is
         considered  in a  proceeding  in  equity or at law);  the  Subordinated
         Debentures  when  issued  by the  Company  and duly  authenticated  and
         delivered by the Debenture Trustee, will be entitled to the benefits of
         the Indenture;  and the Company  Agreements conform to the descriptions
         thereof in the Prospectus;

                  (m) The issue and sale of the  Securities  by the  Trust,  the
         compliance by the Trust with all of the  provisions of this  Agreement,
         the Securities and the  Declaration,  the purchase of the  Subordinated
         Debentures by the Trust, the execution, delivery and performance by the
         Trust  of the  Declaration  and the  consummation  of the  transactions
         contemplated  herein and therein will not conflict  with or result in a
         breach or violation of any of the terms or provisions of, or constitute
         a default under, any indenture, mortgage, deed of trust, loan agreement
         or other  agreement or  instrument  to which the Trust is a party or by
         which the Trust is bound or to which any of the  property  or assets of
         the Trust is subject,  nor will such action  result in any violation of
         the provisions of the Declaration or any existing statute or any order,
         rule or regulation of any court or  governmental  agency or body having
         jurisdiction over the Trust or any of its properties;



                                       8


                  (n) Except as would not individually or in the aggregate, have
         a Material Adverse Effect, the issuance by the Company of the Guarantee
         and the Subordinated Debentures, the compliance by the Company with all
         of the provisions of this Agreement,  the Guarantee,  the  Subordinated
         Debentures, the Declaration and the Indenture, the execution,  delivery
         and performance by the Company and/or the Sponsor,  as the case may be,
         of the Company  Agreements,  and the  consummation of the  transactions
         contemplated  herein and therein will not conflict  with or result in a
         breach or violation of any of the terms or provisions of, or constitute
         a default under, any indenture, mortgage, deed of trust, loan agreement
         or other agreement or instrument to which the Company or any Subsidiary
         is a party or by which the  Company  or any  Subsidiary  is bound or to
         which any of the property or assets of the Company or any Subsidiary is
         subject.  In addition,  such action will not result in any violation of
         the provisions of the Declaration of Trust or the bylaws of the Company
         or any of the Company's  other  organizational  documents or applicable
         laws or any  order,  rule or  regulation  of any court or  governmental
         agency or body  having  jurisdiction  over the Company or any of its or
         its Subsidiaries' properties;

                  (o) The Commission has issued an order under the Act declaring
         the Registration Statement effective and the Guarantee, the Declaration
         and the  Indenture  have  been  qualified  under  the TIA and no  other
         consent, approval, authorization,  order, registration or qualification
         of or with any such court or  governmental  agency or body is  required
         for the issue of the  Securities,  the  Guarantee  or the  Subordinated
         Debentures or the consummation by the Trust or the Company of the other
         transactions  contemplated by this Agreement or the Company Agreements,
         except  (1)  for  approval  of the  eligibility  of the  Trustees,  the
         Guarantee  Trustee and the Debenture  Trustee under the Form T-1s filed
         with the Commission and (2) such consents,  approvals,  authorizations,
         registrations  or   qualifications  as  may  be  required  under  state
         securities  or Blue Sky laws in  connection  with the  issuance  by the
         Trust of the  Securities  and by the Company of the  Guarantee  and the
         Subordinated Debentures.

                  (p)  Ernst &  Young  LLP,  whose  report  on the  consolidated
         financial statements of the Company and the Subsidiaries was filed with
         the Commission as part of the Company's  Annual Report on Form 10-K for
         the  fiscal  year  ended  December  31,  2000  and is  incorporated  by
         reference in the Registration Statement and Prospectus, are independent
         public accountants as required by the Act.

                  (q) KPMG LLP,  whose report on the financial  statements  with
         respect to 42 nursing home  facilities was filed with the Commission as
         part of the Company's  Current Report on Form 8-K/A and is incorporated
         by  reference  in  the  Registration  Statement  and  Prospectus,   are
         independent public accountants as required by the Act.



                                       9


                  (r) All legal or governmental proceedings,  contracts,  leases
         or  documents   of  a  character   required  to  be  described  in  the
         Registration  Statement or the Prospectus or any Incorporated Document,
         and  all  documents   required  to  be  filed  as  an  exhibit  to  the
         Registration  Statement  or any  Incorporated  Document,  have  been so
         described  or filed or will be filed  prior to the time of  purchase as
         required.

                  (s) Except as otherwise set forth in the Prospectus, there are
         no legal or governmental  proceedings pending to which the Company, the
         Trust or any of the  Subsidiaries  is a party  or of  which  any of the
         Company's, the Trust's or any of the Subsidiaries' properties or assets
         or, to the  knowledge of the  Offerors,  any of the  properties  of the
         Company, the Trust and the Subsidiaries that is the subject, the result
         of which  would,  individually  or in the  aggregate,  have a  Material
         Adverse Effect,  and, to the Offerors'  knowledge,  no such proceedings
         are threatened or contemplated,  except as disclosed in the Prospectus,
         the result of which would,  individually  or in the  aggregate,  have a
         Material  Adverse  Effect.  To  the  Offerors'  knowledge,   after  due
         investigation,  there are no legal or governmental  proceedings pending
         to which any  lessee,  sublessee  or  operator  of any  property of the
         Company or the Trust or any  Subsidiary or portion  thereof is a party,
         the result of which would,  individually  or in the  aggregate,  have a
         Material  Adverse Effect,  and no such proceedings are being threatened
         or  contemplated,  except as disclosed in the Prospectus and the result
         of which  would,  individually  or in the  aggregate,  have a  Material
         Adverse  Effect.  Neither  the  Company,  the  Trust  nor  any  of  the
         Subsidiaries has received from any governmental authority notice of any
         violation  of any  local,  state or  federal  law,  rule or  regulation
         including   without   limitation  any  such  law,  rule  or  regulation
         applicable to the health care industry ("Health Care Laws") or relating
         to human health or safety or the  environment or any hazardous or toxic
         substances  or  wastes,  pollutants  or  contaminants   ("Environmental
         Laws"),  except as  disclosed  in the  Prospectus,  the result of which
         would,  individually  or in  the  aggregate,  have a  Material  Adverse
         Effect, and to the Offerors' knowledge,  there is no such violation, or
         any occurrence or circumstance that would give rise to a claim under or
         pursuant  to any  local,  state  or  federal  law,  rule or  regulation
         (including  without  limitation  any Health Care Laws or  Environmental


                                       10


         Laws), which would,  individually or in the aggregate,  have a Material
         Adverse Effect.  To the Offerors'  knowledge,  there is no violation of
         any local, state or federal law, rule or regulation  (including without
         limitation Health Care Laws and Environmental  Laws) by any person from
         whom  the  Company  or  any  of the  Subsidiaries  acquired  any of its
         properties (a "seller"), or any lessee, sublessee or operator of any of
         their respective  properties or any part  thereof, the result of
         which would,  individually or in the aggregate, have a Material Adverse
         Effect, and to the Offerors' knowledge,  there is no such violation, or
         any occurrence or circumstance that would give rise to a claim under or
         pursuant  to any  local,  state  or  federal  law,  rule or  regulation
         (including  without  limitation  any Health Care Laws or  Environmental
         Laws), which would,  individually or in the aggregate,  have a Material
         Adverse  Effect,  except as  disclosed in the  Prospectus.  Neither the
         Offerors  nor  any  of  the   Subsidiaries   have   received  from  any
         governmental  authority any written  notice of any  condemnation  of or
         zoning  change  affecting  the  properties  or any part  thereof of the
         Company  or  any  of  the  Subsidiaries  that  individually  or in  the
         aggregate would have a Material  Adverse Effect and the Offerors do not
         know of any such  condemnation or zoning change which is threatened and
         which if  consummated  individually  or in the  aggregate  would have a
         Material  Adverse Effect.  Nothing has come to the Offerors'  attention
         that any seller,  lessee,  sublessee or operator of any property of the
         Company or any of the  Subsidiaries,  or portion thereof has,  received
         from any governmental  authority any written notice of any condemnation
         of or zoning change affecting the Properties or any part thereof of the
         Company  or  any  of  the  Subsidiaries  that  individually  or in  the
         aggregate would have a Material Adverse Effect.

                  (t) Each of the  Company  and the  Subsidiaries  have good and
         marketable  title in fee  simple  or ground  leases  to the  properties
         disclosed in the Prospectus as being owned by them (the  "Properties"),
         free and clear of all liens, encumbrances,  claims, mortgages, deeds of
         trust,   restrictions,   security   interests  and  defects  ("Property
         Encumbrances"),  except for: (x) the leasehold  interests of lessees in
         the Company's and the  Subsidiaries'  properties  held under lease (the
         "Leases")  and (y) any other  Property  Encumbrances  that  would  not,
         individually or in the aggregate,  have a Material Adverse Effect.  All
         Property  Encumbrances on or affecting the properties of the Company or
         any of the  Subsidiaries  which are  required  to be  disclosed  in the
         Prospectus are disclosed therein.  Each of the Leases pertaining to the
         properties  of the  Company  or any of the  Subsidiaries  has been duly
         authorized by the Company or one of the  Subsidiaries,  as  applicable,
         and is a valid  and  binding  agreement  of the  Company  or one of the
         Subsidiaries,  as  applicable,  and, to the  knowledge of the Offerors,
         each other party  thereto,  enforceable  in accordance  with its terms,
         except as enforcement thereof may be limited by bankruptcy, insolvency,
         moratorium,  fraudulent  conveyance or other similar laws affecting the
         enforcement  of creditors'  rights  generally and by general  equitable
         principles.  To the knowledge of the Offerors, no lessee of any portion
         of any of the properties of the Company or any of the  Subsidiaries  is
         in default under its respective  lease and there is no event which, but
         for  the  passage  of time or the  giving  of  notice  or  both,  would
         constitute a default  under any such lease,  except such  defaults that
         would not,  individually or in the aggregate,  have a Material  Adverse
         Effect.

                  (u) The  Offerors  and each of the  Subsidiaries  and,  to the
         Offerors'  knowledge,  each of the operators,  lessees or sublessees of
         any  property  or  portion  thereof  of  the  Company  or  any  of  the
         Subsidiaries  have such  permits,  licenses,  approvals,  certificates,
         franchises and authorizations of governmental or regulatory


                                       11


         authorities  ("permits"),  including,  without  limitation,  under  any
         Health Care Laws or Environmental Laws, as are necessary in the case of
         each such party to acquire and own, lease or operate its properties and
         to conduct its  business,  all as described in the  Prospectus,  except
         where the failure to obtain such permits would not  individually  or in
         the aggregate have a Material  Adverse  Effect;  except as described in
         the Prospectus,  the Offerors and each of the Subsidiaries  and, to the
         Offerors'  knowledge,  each of the lessees,  sublessees or operators of
         any  property  or  portion  thereof  of  the  Company  or  any  of  the
         Subsidiaries have fulfilled and performed all of their obligations with
         respect to such permits and, except as disclosed in the Prospectus,  no
         event has occurred which allows, or after notice or lapse of time would
         allow,  revocation  or  termination  thereof  or  result  in any  other
         impairment of the rights of the holder of any such permit, except where
         the  failure to fulfill or perform,  or the  resulting  termination  or
         impairment,  would  not,  individually  or in  the  aggregate,  have  a
         Material  Adverse  Effect;  and, except as described in the Prospectus,
         such  permits  contain  no  restrictions  that  are  burdensome  to the
         Offerors  and the  Subsidiaries,  taken  as a  whole  and  that  would,
         individually or in the aggregate, have a Material Adverse Effect.

                  (v)  The  financial  statements,  together  with  the  related
         schedules and notes,  forming a part of the Registration  Statement and
         the Prospectus  present fairly the consolidated  financial  position of
         the Offerors and the  Subsidiaries  as of the dates  indicated  and the
         consolidated  results of operations  and cash flows of the Offerors and
         the Subsidiaries for the periods specified.  Such financial  statements
         have been prepared in conformity  with  generally  accepted  accounting
         principles  applied on a consistent basis during the periods  involved.
         The pro forma  financial  statements and other pro forma financial data
         included in the Registration  Statement and the Prospectus comply as to
         form  in  all  material   respects  with  the   applicable   accounting
         requirements   of  Regulation  S-X  of  the  Act,  and  the  pro  forma
         adjustments have been properly applied to the historical amounts in the
         compilation of those  statements.  The other  financial and statistical
         data set forth in the  Registration  Statement and the  Prospectus  are
         accurately  presented  and  prepared  on a basis  consistent  with such
         financial statements and books and records of the Company. There are no
         financial statements  (historical or pro forma) that are required to be
         included in the Registration  Statement and the Prospectus that are not
         included as required.

                  (w) Subsequent to the respective dates as of which information
         is given in the  Registration  Statement and the Prospectus,  there has
         not been (i) any material adverse change,  or any prospective  material
         adverse change, in the business,  properties,  condition  (financial or
         otherwise),   or  results  of   operations  of  the  Offerors  and  the
         Subsidiaries  taken as a whole,  (ii) any transaction which is material
         to the Offerors or the  Subsidiaries,  (iii) any obligation,  direct or
         contingent,  which is material  to the  Offerors  and the  Subsidiaries
         taken as a whole,  incurred by the Offerors or the


                                       12


         Subsidiaries,  (iv) any change in the shares of beneficial  interest or
         outstanding indebtedness of the Offerors or the Subsidiaries other than
         an increase of  approximately  $2 million  under the  Company's  credit
         facility,  or (v) any dividend or  distribution  of any kind  declared,
         paid or made on the shares of beneficial interest of the Offerors other
         than  (A)  regular  quarterly  dividends,  declared,  paid or made or a
         dividend  distribution  of any  kind  on any  class  of its  shares  of
         beneficial   interest  (other  than  dividends  or  distributions  from
         wholly-owned  subsidiaries  of the  Company)  and (B) the  issuance  of
         common  shares of  beneficial  interest to the  trustees  and  officers
         pursuant to the  Company's  Incentive  Share  Award  Plan.  Neither the
         Offerors nor the  Subsidiaries has any material  contingent  obligation
         which is not disclosed in the Registration Statement.

                  (x) Each of the Offerors and the  Subsidiaries  are insured by
         insurers of recognized financial responsibility against such losses and
         risks and in such amount as are customary in the business in which they
         are engaged,  except as described  in the  Prospectus.  Except as would
         not, individually or in the aggregate,  have a Material Adverse Effect,
         all policies of insurance insuring the Offerors and the Subsidiaries or
         any of their businesses,  assets,  employees,  officers,  directors and
         trustees  are in  full  force  and  effect,  and the  Offerors  and the
         Subsidiaries  are in compliance  with the terms of such policies in all
         material  respects.  Except  as  would  not,  individually  or  in  the
         aggregate,  have a Material Adverse Effect,  there are no claims by the
         Offerors or any of the Subsidiaries under any such policy or instrument
         as to which any  insurance  company is denying  liability  or defending
         under a reservation of rights clause.

                  (y)  Neither  the  Offerors  nor any of the  Subsidiaries  has
         either sent or received any communication  regarding termination of, or
         intent not to renew, any of the contracts or agreements  referred to or
         described  in, or filed as an exhibit to, the  Registration  Statement,
         and no such  termination  or  non-renewal  has been  threatened  by the
         Offerors  or any of the  Subsidiaries  or any  other  party to any such
         contract or agreement.

                  (z) Neither the Offerors nor any of the Subsidiaries or any of
         their  respective  affiliates has taken,  directly or  indirectly,  any
         action designed to or which has  constituted or which might  reasonably
         be expected to cause or result, under the Exchange Act or otherwise, in
         stabilization  or  manipulation  of the  price of any  security  of the
         Offerors to facilitate the sale or resale of the Securities.

                  (aa) The  Offerors  and the  Subsidiaries  have not  sustained
         since the date of the latest audited financial  statements  included in
         the  Prospectus any loss or  interference  with their  businesses  from
         fire,  explosion,  flood or other  calamity,  whether or not covered by
         insurance,  or from any labor dispute or court or governmental  action,
         order or decree, otherwise than as disclosed in the Prospectus or


                                       13


         other than any loss or interference, which would individually or in the
         aggregate not have a Material Adverse Effect.

                  (bb) The  Offerors  and  Subsidiaries  maintain  a  system  of
         internal   accounting   controls   sufficient  to  provide   reasonable
         assurances  that (i)  transactions  are  executed  in  accordance  with
         management's general or specific  authorization;  (ii) transactions are
         recorded as necessary to permit preparation of financial  statements in
         conformity  with  generally  accepted  accounting   principles  and  to
         maintain accountability for assets; (iii) access to assets is permitted
         only in accordance with management's general or specific authorization;
         and (iv) the  recorded  accountability  for  assets  is  compared  with
         existing assets at reasonable intervals and appropriate action is taken
         with respect to any differences.

                  (cc) The Offerors and the Subsidiaries have filed all federal,
         state,  local and  foreign  tax  returns  and tax forms  required to be
         filed.  Such returns and forms are complete and correct in all material
         respects,  and all taxes shown by such  returns or  otherwise  assessed
         that are due or payable have been paid,  except such taxes as are being
         contested  in good faith and as to which  adequate  reserves  have been
         provided.  All payroll withholdings required to be made by the Offerors
         and the Subsidiaries  with respect to employees have been made,  except
         where the failure to fulfill or perform,  would not, individually or in
         the aggregate,  have a Material Adverse Effect.  The charges,  accruals
         and  reserves  on the books of the  Offerors  and the  Subsidiaries  in
         respect of any tax  liability for any year not finally  determined  are
         adequate to meet any assessments or reassessments for additional taxes.
         There have been no tax  deficiencies  asserted  and,  to the  Offerors'
         knowledge, no tax deficiency might be reasonably asserted or threatened
         against the Offerors and/or the Subsidiaries that would individually or
         in the aggregate have a Material Adverse Effect.

                  (dd) The Company meets the requirements for  qualification and
         taxation as a real estate  investment trust ("REIT") under the Internal
         Revenue Code of 1986 (the "Code").

                  (ee)  Neither the Trust nor the Company is nor,  after  giving
         effect  to  the  offering  and  sale  of  the  Securities,  will  be an
         "investment  company"  or an  entity  "controlled"  by  an  "investment
         company,"  as such terms are defined in the  Investment  Company Act of
         1940, as amended (the "Investment Company Act").

                  4. Certain Covenants of the Offerors. The Offerors jointly and
severally hereby agree:

                  (a)  to  furnish  such  information  as may  be  required  and
         otherwise to cooperate in qualifying the Securities, and, to the extent
         required or advisable,  the


                                       14


         Guarantee and the Subordinated Debentures,  for offering and sale under
         the securities or blue sky laws of such states as you may designate and
         to maintain such  qualifications  in effect so long as required for the
         distribution of the Securities; provided that the Company and the Trust
         shall not be required to qualify as a foreign corporation or to consent
         to the  service  of process  under the laws of any such  state  (except
         service  of  process  with  respect  to the  offering  and  sale of the
         Securities);  and to promptly  advise you of the receipt by the Company
         of any notification with respect to the suspension of the qualification
         of the  Securities  for sale in any  jurisdiction  or the initiation or
         threatening of any proceeding for such purpose;

                  (b) to make available to the  Underwriters in New York City as
         many  copies of the  Prospectus  (or of the  Prospectus  as  amended or
         supplemented  if  the  Offerors  shall  have  made  any  amendments  or
         supplements thereto) as the Underwriters may reasonably request for the
         purposes  contemplated  by the Act; in case any Underwriter is required
         to deliver a prospectus  beyond the  nine-month  period  referred to in
         Section  10(a)(3)  of the  Act  in  connection  with  the  sale  of the
         Securities,  the Offerors will prepare  promptly  upon request,  at its
         expense, such amendment or amendments to the Registration Statement and
         such  prospectuses  as may be necessary to permit  compliance  with the
         requirements of Section 10(a)(3) of the Act;

                  (c) to advise you promptly, confirming such advice in writing,
         of any request by the  Commission  for amendments or supplements to the
         Registration Statement or Prospectus or for additional information with
         respect thereto, or of notice of institution of proceedings for, or the
         entry of a stop order suspending the  effectiveness of the Registration
         Statement and, if the Commission  should enter a stop order  suspending
         the  effectiveness  of  the  Registration   Statement,  to  make  every
         reasonable  effort to obtain  the  lifting  or removal of such order as
         soon as  possible;  to advise you  promptly of any proposal to amend or
         supplement the Registration Statement or Prospectus including by filing
         any documents  that would be  incorporated  therein by reference and to
         file no such  amendment  or  supplement  to which you  shall  object in
         writing;

                  (d) that the Company  will file  promptly  all reports and any
         definitive proxy or information  statement  required to be filed by the
         Company  with the  Commission  in order to comply with the Exchange Act
         subsequent  to the  date  of the  Prospectus  and  for so  long  as the
         delivery of a prospectus is required in connection with the offering or
         sale of the shares, and to promptly notify you of such filing;

                  (e) if, at the time this  Agreement is executed and delivered,
         it is necessary  for the  registration  statement  or a  post-effective
         amendment  thereto  or any  Abbreviated  Registration  Statement  to be
         declared  effective before the offering of the Securities may commence,
         the Offerors will endeavor to cause the Registration


                                       15


         Statement or such post-effective  amendment to become effective as soon
         as possible and will advise you promptly and, if requested by you, will
         confirm such advice in writing, when the Registration Statement or such
         post-effective amendment has become effective;

                  (f) to furnish to you and, upon request,  to each of the other
         Underwriters  for a  period  of  three  years  from  the  date  of this
         Agreement (i) copies of any reports or other  communications  which the
         Company  shall  send to its  shareholders  or shall  from  time to time
         publish or publicly disseminate,  (ii) copies of all annual,  quarterly
         and current  reports filed with the Commission on Forms 10-K,  10-Q and
         8-K, or such other similar form as may be designated by the Commission,
         (iii) copies of documents or reports filed with any national securities
         exchange on which any class of  securities  of the Offerors are listed,
         and (iv) such other information as you may reasonably request regarding
         the  Offerors  or the  Subsidiaries,  in  each  case  as  soon  as such
         communications,  documents or information becomes available;  provided,
         however,  that in no case shall the  Offerors  be  required  to furnish
         materials  pursuant  to this  paragraph  which are  filed and  publicly
         accessible via EDGAR;

                  (g) to advise the  Underwriters  promptly of the  happening of
         any  event  known  to the  Offerors  within  the  time  during  which a
         Prospectus relating to the Securities is required to be delivered under
         the Act which,  in the  judgment  of the  Offerors,  would  require the
         making of any  change in the  Prospectus  then  being  used,  or in the
         information  incorporated therein by reference,  so that the Prospectus
         would not include an untrue statement of material fact or omit to state
         a material fact necessary to make the statements  therein, in the light
         of the  circumstances  under which they are made, not misleading,  and,
         during such time, to prepare and furnish,  at the Offerors' expense, to
         the  Underwriters  promptly  such  amendments  or  supplements  to such
         Prospectus  as may be  necessary  to  reflect  any such  change  and to
         furnish you a copy of such  proposed  amendment  or  supplement  before
         filing any such amendment or supplement with the Commission;

                  (h) to make generally  available to its security holders,  and
         to deliver to you, an  earnings  statement  of the Company  (which will
         satisfy the  provisions  of Section 11(a) of the Act) covering a period
         of  twelve  months  beginning  after  the  date of the  Prospectus  (as
         contemplated  in Rule  158(c)  of the  Act)  as  soon as is  reasonably
         practicable after the termination of such twelve-month period;

                  (i) to  furnish  to  each  of the  Representatives  and  Dewey
         Ballantine LLP one conformed  copy of the  Registration  Statement,  as
         initially  filed with the  Commission,  and of all  amendments  thereto
         (including all exhibits thereto and documents incorporated by reference
         therein),  and sufficient conformed copies of the


                                       16


         foregoing  (other than exhibits) for  distribution of a copy to each of
         the other Underwriters;

                  (j) to  furnish  to you as early as  practicable  prior to the
         time of purchase and the additional  time of purchase,  as the case may
         be, but not later than two business days prior  thereto,  a copy of the
         latest available unaudited interim consolidated  financial  statements,
         if any, of the Company and the Subsidiaries which have been read by the
         Company's independent certified public accountants,  as stated in their
         letter to be furnished pursuant to Section 6(d) hereof;

                  (k) to apply the proceeds  from the sale of the  Securities in
         the  manner  set  forth  under the  caption  "Use of  Proceeds"  in the
         Prospectus;

                  (l)  that  the  Offerors   will   jointly  and   severally  be
         responsible  for payment of all expenses,  fees and taxes in connection
         with (i) the preparation and filing of the Registration Statement,  the
         Basic Prospectus, any Prepricing Prospectus, the Prospectus Supplement,
         the  Prospectus,  and any  amendments or supplements  thereto,  and the
         printing and  furnishing of copies of each thereof to the  Underwriters
         and to dealers  (including  costs of mailing  and  shipment),  (ii) the
         issuance,  sale  and  delivery  of  the  Securities,   (iii)  the  word
         processing  and/or  printing of this  Agreement,  any  Agreement  Among
         Underwriters  and any dealer  agreements  and the  reproduction  and/or
         printing and  furnishing of copies of each thereof to the  Underwriters
         and to dealers  (including  costs of mailing  and  shipment),  (iv) the
         qualification  of  the  Securities,   the  Guarantee  and  Subordinated
         Debentures  issuable upon exchange of the Securities,  for offering and
         sale under state laws and the  determination  of their  eligibility for
         investment  under state law as aforesaid  (including the legal fees and
         filing fees and other disbursements of counsel to the Underwriters) and
         the printing and  furnishing of copies of any blue sky surveys or legal
         investment surveys to the Underwriters and to dealers,  (v) any listing
         of the  Securities  on any  securities  exchange  and any  registration
         thereof  under the  Exchange  Act,  (vi) the  filing  for review of the
         public offering of the Securities by NASD Regulation,  Inc.  (including
         the legal fees and filing  fees and other  disbursements  of counsel to
         the Underwriters with respect thereto), (vii) the cost of preparing the
         Securities and the Company Agreements,  (viii) the fees and expenses of
         the Trustees,  the Guarantee  Trustee and the Debenture Trustee and any
         agent of the Trustees,  the Guarantee Trustee and the Debenture Trustee
         and  the  fees  and  disbursements  of  counsel  for  the  Trustees  in
         connection with the  Declaration  and the  Securities,  counsel for the
         Guarantee  Trustee in connection with the Guarantee and counsel for the
         Debenture Trustee in connection with the Indenture and the Subordinated
         Debentures,  (ix) any fees charged by securities  ratings  services for
         rating the  Securities  and the  Subordinated  Indentures,  and (x) the
         performance of the Company's other obligations under this agreement;



                                       17


                  (m) to  furnish  to you,  before  filing  with the  Commission
         subsequent  to the  effective  date of the  Registration  Statement and
         during the period  referred to in  paragraph  (g) above,  a copy of any
         document  proposed  to be filed  pursuant to Section 13, 14 or 15(d) of
         the Exchange Act;

                  (n) to not,  without the prior written consent of UBS Warburg,
         offer,  sell,  contract to sell,  pledge,  or otherwise dispose of, (or
         enter into any transaction which is designed to, or might reasonably be
         expected to, result in the disposition  (whether by actual  disposition
         or effective economic  disposition due to cash settlement or otherwise)
         by the Company or any affiliate of the Company or any person in privity
         with  the  Company  or  any  affiliate  of  the  Company)  directly  or
         indirectly,  including the filing (or participation in the filing) of a
         registration  statement with the Commission in respect of, or establish
         or increase a put  equivalent  position or liquidate or decrease a call
         equivalent  position  within the meaning of Section 16 of the  Exchange
         Act, any Trust Preferred Securities or substantially similar securities
         to Trust  Preferred  Securities,  or publicly  announce an intention to
         effect any such transaction,  within 30 days after the time of purchase
         or the additional time of purchase, as the case may be;

                  (o) to use their best  efforts to cause the  Securities  to be
         listed  on the  NYSE  within  30 days  hereof;  if the  Securities  are
         exchanged for  Subordinated  Debentures,  the Company will use its best
         efforts to effect the  listing of the  Subordinated  Debentures  on any
         exchange on which the Securities are then listed;

                  (p) that the Company  will use its best efforts to continue to
         qualify as a REIT under the Code.

                  5. Reimbursement of Underwriters'  Expenses. If the Securities
are not delivered for any reason other than the  termination  of this  Agreement
pursuant  to clause  (ii),  (iii) or (iv) of the second  paragraph  of Section 7
hereof or pursuant to the last  paragraph  of Section 8 hereof or the default by
one  or  more  of  the  Underwriters  in its  or  their  respective  obligations
hereunder,  the Company  shall,  in addition to paying the amounts  described in
Section 4 hereof,  reimburse  the  Underwriters  for all of their  out-of-pocket
expenses, including the reasonable fees and disbursements of their counsel.

                  6.  Conditions  of  Underwriters'  Obligations.   The  several
obligations  of the  Underwriters  hereunder  are subject to the accuracy of the
representations  and  warranties on the part of the Offerors on the date hereof,
at the time of purchase and at the additional time of purchase,  as the case may
be, the performance by the Offerors of their  respective  obligations  hereunder
and to the following additional conditions precedent:

                  (a) The Offerors  shall furnish to you at the time of purchase
         and at the additional time of purchase,  as the case may be, an opinion
         of Sullivan & Worcester


                                       18


         LLP, counsel for the Offerors, addressed to the Underwriters, and dated
         the time of purchase and the additional  time of purchase,  as the case
         may be, with reproduced  copies for each of the other  Underwriters and
         in  form   satisfactory  to  Dewey  Ballantine  LLP,  counsel  for  the
         Underwriters, stating that:

                           (i) the Company has been duly formed,  is existing as
                  a real estate  investment  trust and is in good standing under
                  the laws of the State of  Maryland,  with trust  power to own,
                  lease and operate its  properties  and conduct its business in
                  all  material   respects  as  described  in  the  Registration
                  Statement  and the  Prospectus,  to execute and  deliver  this
                  Agreement  and to issue,  sell and  deliver  the  Subordinated
                  Debentures as herein contemplated;

                           (ii)  the  Company  is  duly  qualified  to  transact
                  business and is in good standing in each other jurisdiction in
                  which it owns or leases properties,  or conducts any business,
                  so  as  to  require  such  qualification,   other  than  those
                  jurisdictions as to which the failure to be so qualified or in
                  good standing  could not,  individually  or in the  aggregate,
                  reasonably be expected to have a Material Adverse Effect;

                           (iii) each  Subsidiary  of the Company  identified in
                  Schedule C attached hereto (each a "Material Subsidiary") is a
                  corporation or other legal entity duly formed, existing and in
                  good  standing   under  the  laws  of  its   jurisdiction   of
                  organization,  and is duly qualified as a foreign  corporation
                  or  other  legal  entity  and  is in  good  standing  in  each
                  jurisdiction in which such  qualification  is required by law,
                  other than those  jurisdictions  as to which the failure to be
                  so qualified or in good standing could not, individually or in
                  the  aggregate,  reasonably  be  expected  to have a  Material
                  Adverse  Effect.  Each Material  Subsidiary  has the corporate
                  trust,  partnership  or other power to own or hold under lease
                  the  properties  it purports to own or hold under lease and to
                  transact the  business it transacts  and proposes to transact.
                  All  of  the  issued  and  outstanding  shares  of  beneficial
                  ownership  of,  or  other  ownership  interests  in,  of  each
                  Material  Subsidiary  has been  duly  authorized  and  validly
                  issued,  is fully paid and except as to Material  Subsidiaries
                  that are  partnerships,  non-assessable  and except for SPTMRT
                  Properties Trust, is owned by the Company, directly or through
                  subsidiaries,   free  and  clear  of  any  security  interest,
                  mortgage, pledge, lien or encumbrance;

                           (iv)  this   Agreement  has  been  duly   authorized,
                  executed and delivered by the Company,  and is a legal,  valid
                  and  binding   agreement  of  the  Company,   enforceable   in
                  accordance with their terms, except as enforcement of the same
                  may  be  limited  by   bankruptcy,   insolvency,


                                       19


                  moratorium,   fraudulent  conveyance  or  other  similar  laws
                  affecting the enforcement of creditors'  rights  generally and
                  by  general  equitable  principles  and  except  as  to  those
                  provisions  relating to indemnities  for  liabilities  arising
                  under the Act as to which no opinion need be expressed;

                           (v) the  Subordinated  Debentures  have been duly and
                  validly  authorized by all necessary  trust action on the part
                  of the Company and, the Subordinated Debentures have been duly
                  and validly  executed by and delivered by the Company and when
                  authenticated by the Debenture  Trustee in accordance with the
                  Indenture and paid for by the Trust, will be valid and binding
                  obligations  of the Company,  enforceable  in accordance  with
                  their terms,  except as such  enforceability is subject to the
                  effect    of   any    applicable    bankruptcy,    insolvency,
                  reorganization   or  other  law   relating  to  or   affecting
                  creditors'  rights  generally  and to  general  principles  of
                  equity   (regardless   of  whether  such   enforceability   is
                  considered  in a  proceeding  in  equity  or at law),  and the
                  Subordinated  Debentures  are in the form  provided for by the
                  Indenture;

                           (vi)  the   Guarantee   has  been  duly  and  validly
                  authorized  by all  necessary  trust action on the part of the
                  Company;  the Guarantee has been duly and validly executed and
                  delivered  by the Company  and  (assuming  due  authorization,
                  execution and delivery by the Guarantee  Trustee)  constitutes
                  the valid and binding  obligation of the Company,  enforceable
                  in accordance with its terms, except as such enforceability is
                  subject   to  the   effect  of  any   applicable   bankruptcy,
                  insolvency,   reorganization  or  other  law  relating  to  or
                  affecting   creditors'   rights   generally   and  to  general
                  principles   of   equity    (regardless    of   whether   such
                  enforceability  is  considered in a proceeding in equity or at
                  law);

                           (vii) the  Declaration  and the  Indenture  have each
                  been duly  authorized,  executed and  delivered by the Sponsor
                  and the Company,  as the case may be, and,  when  executed and
                  delivered by the other parties thereto,  will constitute valid
                  and binding obligations of the Sponsor and the Company, as the
                  case may be,  enforceable in accordance with their  respective
                  terms,  except as such enforceability is subject to the effect
                  of any applicable  bankruptcy,  insolvency,  reorganization or
                  other law relating to or affecting creditors' rights generally
                  and to general  principles  of equity  (regardless  of whether
                  such  enforceability  is considered in proceeding in equity or
                  at law);

                           (viii) the Company has an  authorized  capitalization
                  as set forth under the caption  "Description of Common Shares"
                  in the Prospectus,  and


                                       20


                  all of the issued shares of beneficial interest of the Company
                  have been duly  authorized by all  necessary  trust action and
                  are validly issued,  and are fully paid and non-assessable and
                  are not subject to  preemptive  or, to the  knowledge  of such
                  counsel, similar rights;

                           (ix) the terms of the  Securities,  the  Subordinated
                  Debentures  and the  Guarantee  conform as to legal matters in
                  all material respects to the descriptions thereof contained in
                  the  Prospectus,  including,  without  limitation,  under  the
                  captions  "Description of debt securities" and "Description of
                  trust   preferred   securities  and  trust   guarantee";   the
                  Securities,  the  Subordinated  Debentures  and the  Guarantee
                  conform as to legal  matters in all  material  respects to the
                  descriptions  thereof contained in the Prospectus  Supplement,
                  including, without limitation, under the captions "Description
                  of the trust preferred securities", "Description of the junior
                  subordinated debentures", "Subordination of the guarantee" and
                  "Relationship  among  the  trust  preferred  securities,   the
                  guarantee and the junior subordinated debentures";

                           (x) the Guarantee,  the Declaration and the Indenture
                  will have been duly qualified under the TIA;

                           (xi) the  Registration  Statement and the  Prospectus
                  (except as to the financial statements and schedules and other
                  financial  and  statistical  data  contained  therein  and the
                  Statements  of   Eligibility  on  Form  T-1  included  in  the
                  Registration  Statement,  as to all of which such counsel need
                  express no opinion) comply as to form in all material respects
                  with the requirements of the Act;

                           (xii) the Registration Statement has become effective
                  under the Act and, to such counsel's knowledge,  no stop order
                  proceedings  with  respect  thereto are pending or  threatened
                  under the Act and any required filing of the  Prospectus,  and
                  any supplement  thereto pursuant to Rule 424 under the Act has
                  been made in the manner and within the time period required by
                  such Rule 424;

                           (xiii) no approval,  authorization,  consent or order
                  of or filing with any federal, Maryland,  Massachusetts or New
                  York  governmental  or  regulatory  commission,  board,  body,
                  authority or agency  having  jurisdiction  over the Company or
                  the  Sponsor,  as the case may be, is required  in  connection
                  with the execution, delivery and performance of this Agreement
                  and the  Company  Agreements,  the  issuance  and  sale of the
                  Securities  being delivered at the time of purchase and at the
                  additional


                                       21


                  time of  purchase,  as the case may be, or the issuance of the
                  Guarantee and the Subordinated Debentures and the consummation
                  of  the  transactions  contemplated  hereby,  by  the  Company
                  Agreements and by the  Prospectus,  other than those that have
                  been  obtained  under  the Act and  other  than any  necessary
                  qualification  under the state  securities or blue sky laws of
                  the various  jurisdictions  in which the  Securities are being
                  offered by the  Underwriters,  as to which such  qualification
                  such counsel need express no opinion;

                           (xiv) the execution, delivery and performance of this
                  Agreement  and the Company  Agreements  by the Company and the
                  transactions contemplated hereby, by the Company Agreements do
                  not and will not conflict with, or result in any breach of, or
                  constitute a violation  under (nor  constitute any event which
                  with  notice,  lapse of time,  or both,  would  result  in any
                  breach of, or constitute a default  under) (A) any  provisions
                  of  the  Declaration  of  Trust,  charter,  by-laws  or  other
                  organizational documents of the Company or any of the Material
                  Subsidiaries,  (B) any provision of any material  agreement or
                  other  instrument  to which the Company or any of the Material
                  Subsidiaries   is  a  party  or  by  which  their   respective
                  properties may be bound or affected,  that is described in the
                  Prospectus filed as an exhibit to the  Registration  Statement
                  or is  otherwise  known to such  counsel  or (C) any  federal,
                  state,  local or  foreign  law,  regulation  or  rule,  or any
                  decree, to which the Company or the Material  Subsidiaries may
                  be subject;

                           (xv)  to  such  counsel's  knowledge,  there  are  no
                  contracts,  licenses,  agreements,  leases or  documents  of a
                  character  which are  required  to be filed as exhibits to the
                  Registration  Statement or to be  described in the  Prospectus
                  which have not been so filed or described;

                           (xvi) each of the Company  and the Trust is not,  and
                  after  the  offering  and  sale  of  the  Securities  and  the
                  Subordinated Debentures, will not be, an "investment company,"
                  or an entity  controlled by an  "investment  company," as such
                  terms are defined in the Investment Company Act; and

                           (xvii) to such counsel's  knowledge the statements in
                  (i) the  Registration  Statement and the Prospectus  under the
                  captions "Risk factors--Risks  Relating to the Trust Preferred
                  Securities",  "Tenants and property operations",  "SNH Capital
                  Trust I",  "Description  of the trust  preferred  securities",
                  "Description   of   the   junior   subordinated   debentures",
                  "Subordination  of the  guarantee",  "Relationship  among  the
                  trust  preferred


                                       22


                  securities,   the  guarantee   and  the  junior   subordinated
                  debentures",  "Federal income tax  considerations"  and "ERISA
                  plans, Keogh plans and individual  retirement accounts" and in
                  the  Company's  Annual Report on Form 10-K for the fiscal year
                  ended     December     31,    2000    under    the    captions
                  "Business--Financing  Policies"  (with  respect  to the  first
                  paragraph  only),  "Business--Regulation  and  Reimbursement",
                  "Business--Government   Regulations   and  Rate  Setting"  and
                  "Federal  Income Tax  Considerations"  in each case insofar as
                  such  statements  purport to summarize  matters  arising under
                  Maryland,  Massachusetts or New York law or the federal law of
                  the United States,  or provisions of documents as to which the
                  Company  or the  Trust  is a party  specifically  referred  to
                  therein, are accurate in all material respects.

                  In addition,  such counsel shall state that, in the opinion of
such counsel,  and subject to the restrictions and limitations set forth in such
counsel's tax opinion filed as an exhibit to the Registration Statement, (a) the
Company  has  qualified  to be  taxed as a REIT  under  the Code for each of its
fiscal  years  and  (b)  the  proposed  method  of  operation  described  in the
Prospectus  and as  represented  to such  counsel by the Company will enable the
Company to continue  to satisfy  the  requirements  for such  qualification  for
subsequent fiscal years under the Code. Actual qualification as a REIT, however,
will depend  upon the  Company's  continued  ability to meet,  and its  meeting,
through  actual  annual  operating  results  and   distributions,   the  various
qualifying tests under the Code.

                  Also,  such counsel  shall state that it has  participated  in
conferences   with   officers   and  other   representatives   of  the  Company,
representatives  of  the  independent  public  accountants  of the  Company  and
representatives  of the  Underwriters at which the contents of the  Registration
Statement  and  Prospectus  were  discussed  and,  although  such counsel is not
passing upon and does not assume  responsibility for the accuracy,  completeness
or  fairness  of the  statements  contained  in the  Registration  Statement  or
Prospectus  (except as and to the extent stated in subparagraphs (xi) and (xvii)
above and the paragraph immediately preceeding this paragraph),  on the basis of
the foregoing nothing has come to the attention of such counsel that causes them
to believe that the Registration  Statement or any amendment thereto at the time
such  Registration  Statement or amendment became effective  contained an untrue
statement of a material  fact or omitted to state a material fact required to be
stated therein or necessary to make the statements  therein not  misleading,  or
that the Prospectus or any supplement  thereto at the date of such Prospectus or
such  supplement,  and at all times up to and including the time of purchase and
the  additional  time of  purchase,  as the case  may be,  contained  an  untrue
statement of a material  fact or omitted to state a material fact required to be
stated  therein or necessary  to make the  statements  therein,  in light of the
circumstances  under which they were made, not  misleading (it being  understood
that such counsel need express no opinion with respect to the


                                       23


financial  statements  and schedules and other  financial and  statistical  data
included  and the  Statements  of  Eligibility  on Form T-1 in the  Registration
Statement or Prospectus).

                  In rendering their opinion as aforesaid,  Sullivan & Worcester
LLP may rely upon an opinion, dated as of the time of purchase or the additional
time of purchase, as the case may be, of Ballard Spahr Andrews & Ingersoll,  LLP
as to matters governed by Maryland law, provided that such reliance is expressly
authorized  by such  opinion  and a copy of such  opinion  is  delivered  to the
Underwriters and is, in form and substance, satisfactory to the Underwriters and
counsel for the  Underwriters.  In addition,  in rendering  such  opinion,  such
counsel  may state that their  opinion  as to laws of the State of  Delaware  is
limited to the  Delaware  General  Corporation  Law and that their  opinion with
respect to the  qualification  of the Company and is Subsidiaries to do business
in  jurisdictions  other than their  respective  jurisdiction of organization is
based solely upon certificates to such effect issued by an appropriate  official
of the applicable jurisdictions.

                  (b) The Offerors  shall furnish to you at the time of purchase
         and at the additional time of purchase,  as the case may be, an opinion
         of Ballard Spahr Andrews & Ingersoll,  LLP, special Maryland counsel of
         the  Offerors,  addressed  to the  Underwriters,  and dated the time of
         purchase and the additional time of purchase,  as the case may be, with
         reproduced  copies  for  each  of the  other  Underwriters  and in form
         satisfactory  to Dewey  Ballantine LLP,  counsel for the  Underwriters,
         stating that:

                           (i) the Company has been duly formed,  is existing as
                  a real estate  investment  trust and is in good standing under
                  the laws of the State of  Maryland,  with trust  power to own,
                  lease and operate its  properties  and conduct its business in
                  all  material   respects  as  described  in  the  Registration
                  Statement  and the  Prospectus,  to execute and  deliver  this
                  Agreement  and to issue,  sell and  deliver  the  Subordinated
                  Debentures as herein contemplated;

                           (ii) each  Subsidiary  of the Company  identified  in
                  Schedule D attached hereto (each a "Maryland Subsidiary") is a
                  corporation or other legal entity duly formed, existing and in
                  good  standing   under  the  laws  of  its   jurisdiction   of
                  organization.  Each Maryland Subsidiary has the trust power to
                  own or hold under lease the  properties  it purports to own or
                  hold under lease and to transact the business it transacts and
                  proposes to transact. All of the issued and outstanding shares
                  of beneficial  interest of each Maryland  Subsidiary have been
                  duly  authorized  and  validly  issued,   is  fully  paid  and
                  non-assessable  and is  owned  by  the  Company,  directly  or
                  through subsidiaries,  and to such counsel's knowledge, except
                  for SPTMRT  Properties  Trust,  free and clear of any security
                  interest,  mortgage,  pledge,  lien,  encumbrance,   claim  or
                  equity;



                                       24


                           (iii) the Trust has been duly  formed and is existing
                  and in good  standing as a business  trust under the  Maryland
                  Business Trust Act, and all filings required under the laws of
                  the State of Maryland  with  respect to the creation and valid
                  existence of the Trust as a business trust have been made;

                           (iv) under the  Maryland  Business  Trust Act and the
                  Declaration, the Trust has the trust power to own property and
                  conduct its business, in all material respects as described in
                  the Prospectus;

                           (v) under  the  Maryland  Business  Trust Act and the
                  Declaration,  the Trust has the trust  power to (a) enter into
                  and perform its obligations under this Agreement and (b) issue
                  and  perform  its  obligations  under the  Securities  and the
                  Common Securities;

                           (vi) under the  Maryland  Business  Trust Act and the
                  Declaration,  the  execution and delivery by the Trust of this
                  Agreement, and the performance by the Trust of its obligations
                  hereunder,  have been duly  authorized by all necessary  trust
                  action on the part of the Trust;

                           (vii) under the Maryland  Business  Trust Act and the
                  Declaration,  this  Agreement  has been duly  executed  by the
                  Company, the Sponsor and the Trust;

                           (viii) the  Securities  have been duly  authorized in
                  the  Declaration  and are validly  issued and,  subject to the
                  qualifications set forth herein, fully paid and non-assessable
                  undivided  beneficial interests in the assets of the Trust and
                  are  entitled  to the  benefits  provided  by the  Declaration
                  (subject to the terms of the Declaration);  provided that such
                  counsel may note that the  Securityholders  may be  obligated,
                  pursuant to the Declaration,  to (a) provide  indemnity and/or
                  security  in  connection  with and pay  taxes or  governmental
                  charges  arising from  transfers  or  exchanges of  Securities
                  certificates  and  the  issuance  of  replacement   Securities
                  certificates   and  (b)  provide  security  and  indemnity  in
                  connection  with  requests of or  directions  to the  Property
                  Trustee (as defined in the Declaration) to exercise its rights
                  and remedies under the Declaration.  Except as provided in the
                  foregoing sentence, the Securityholders,  as beneficial owners
                  of the Trust,  are entitled to the same limitation of personal
                  liability extended to stockholders of private corporations for
                  profit  organized  under  Title  2  of  the  Maryland  General
                  Corporation Law;



                                       25


                           (ix) the  Common  Securities  of the Trust  have been
                  duly authorized by the Declaration and are validly issued, and
                  fully paid undivided beneficial interests in the assets of the
                  Trust;

                           (x) under  the  Maryland  Business  Trust Act and the
                  Declaration,  the  issuance of the  Securities  and the Common
                  Securities is not subject to preemptive rights;

                           (xi)  the  issuance  and  sale  by the  Trust  of the
                  Securities and the Common Securities, the execution,  delivery
                  and performance by the Trust of this Agreement and the Company
                  Agreements,  the consummation by the Trust of the transactions
                  contemplated   by  this  Agreement  and  the  Declaration  and
                  compliance by the Trust with its obligations thereunder do not
                  violate (a) any of the provisions of the  Certificate of Trust
                  of  the  Trust  or  the  Declaration  or  any   organizational
                  documents  of any of the  Maryland  Subsidiaries,  or (b)  any
                  applicable  local  or  state  Maryland  law or  administrative
                  regulation;

                           (xii) the Subordinated  Debentures have been duly and
                  validly  authorized by all necessary  trust action on the part
                  of the Company and, the Subordinated Debentures have been duly
                  and validly executed by and delivered by the Company;

                           (xiii)  the  Guarantee  has  been  duly  and  validly
                  authorized  by all  necessary  trust action on the part of the
                  Company;  the Guarantee has been duly and validly executed and
                  delivered by the Company;

                           (xiv) the Company has an authorized capitalization as
                  set forth under the caption  "Description of Common Shares" in
                  the  Prospectus,  and all of the issued  shares of  beneficial
                  interest  of the  Company  have  been duly  authorized  by all
                  necessary trust action and are validly  issued,  and are fully
                  paid and  non-assessable and are not subject to preemptive or,
                  to the knowledge of such counsel, similar rights;

                           (xv) to such  counsel's  knowledge the  statements in
                  (i) the  Registration  Statement and the Prospectus  under the
                  captions "Risk factors--Risks  Relating to the Trust Preferred
                  Securities",  "SNH Capital Trust I", "Description of the trust
                  preferred securities", "Relationship among the trust preferred
                  securities,   the  guarantee   and  the  junior   subordinated
                  debentures",  "Description of trust  preferred  securities and
                  trust  guarantee",   "Description  of  certain  provisions  of
                  Maryland law and of our  declaration  of trust and bylaws" and
                  in each case insofar as such


                                       26


                  statements purport to summarize matters arising under Maryland
                  law are accurate in all material respects;

                           (xvi) no approval, authorization, consent or order of
                  or  filing  with  any  Maryland   governmental  or  regulatory
                  commission,   board,   body,   authority   or  agency   having
                  jurisdiction  over the Company is required in connection  with
                  the execution,  delivery and performance of this Agreement and
                  the  Company   Agreements,   the  issuance  and  sale  of  the
                  Securities  being delivered at the time of purchase and at the
                  additional  time of  purchase,  as the  case  may  be,  or the
                  issuance of the Guarantee and the Subordinated  Debentures and
                  the consummation of the transactions  contemplated  hereby, by
                  the Company Agreements and by the Prospectus (In rendering the
                  opinion  expressed in this paragraph (xvi),  such counsel need
                  express no opinion concerning the securities laws of the State
                  of Maryland.); and

                           (xvii) the Securityholders  (other than those holders
                  of the  Securities who reside or are domiciled in the State of
                  Maryland)  will have no liability  for income taxes imposed by
                  the   State  of   Maryland   solely   as  a  result  of  their
                  participation  in the Trust,  and the Trust will not be liable
                  for any income tax imposed by the State of Maryland.

                  (c) You shall have received at the time of purchase and at the
         additional  time of  purchase,  as the case may be, an opinion of Dewey
         Ballantine  LLP,  counsel  for  the  Underwriters,  dated  the  time of
         purchase and the additional time of purchase,  as the case may be, with
         respect to the issuance and sale of the Securities by the Company,  the
         Registration  Statement,  the Prospectus and such other related matters
         as the Underwriters may require. In addition,  Dewey Ballantine LLP may
         rely on the opinion of Ballard Spahr Andrews & Ingersoll, LLP as to all
         matters of Maryland law.

                  (d) You shall have  received  from Ernst & Young LLP, a letter
         dated,  respectively,  the  date of  this  Agreement  and  the  time of
         purchase and the additional  time of purchase,  as the case may be, and
         addressed to the Underwriters  (with reproduced  copies for each of the
         Underwriters)  in the forms approved by Dewey  Ballantine LLP,  counsel
         for the Underwriters.

                  (e) You shall have  received  from KPMG LLP,  a letter  dated,
         respectively,  the date of this  Agreement and the time of purchase and
         the additional  time of purchase,  as the case may be, and addressed to
         the Underwriters  (with reproduced copies for each of the Underwriters)
         in the  forms  approved  by  Dewey  Ballantine  LLP,  counsel  for  the
         Underwriters.



                                       27


                  (f) No amendment or supplement to the  Registration  Statement
         or  Prospectus,  including  documents  deemed  to  be  incorporated  by
         reference  therein,  shall have been made to which you have objected in
         writing.

                  (g) Prior to the time of purchase and the  additional  time of
         purchase,  as the case may be, (i) no stop  order  with  respect to the
         effectiveness  of the  Registration  Statement  shall have been  issued
         under the Act or  proceedings  initiated  under Section 8(d) or 8(e) of
         the Act; (ii) the Registration Statement and all amendments thereto, or
         modifications thereof, if any, shall not contain an untrue statement of
         a material  fact or omit to state a material fact required to be stated
         therein or necessary to make the statements therein not misleading; and
         (iii) the  Prospectus and all  amendments or  supplements  thereto,  or
         modifications thereof, if any, shall not contain an untrue statement of
         a material  fact or omit to state a material fact required to be stated
         therein or necessary to make the  statements  therein,  in the light of
         the circumstances under which they are made, not misleading.

                  (h) Between the time of  execution of this  Agreement  and the
         time of purchase and the additional  time of purchase,  as the case may
         be, (i) no material  and  unfavorable  change,  financial  or otherwise
         (other  than  as  referred  to  in  the   Registration   Statement  and
         Prospectus), in the business, prospects,  properties,  condition of the
         Offerors  and the  Subsidiaries  taken as a whole shall occur or become
         known and (ii) no transaction  which is material and unfavorable to the
         Offerors and the Subsidiaries  taken as a whole shall have been entered
         into by the Offerors or any of the Subsidiaries.

                  (i) Between the time of  execution of this  Agreement  and the
         time of purchase and the additional  time of purchase,  as the case may
         be, there shall not have occurred any downgrading, nor shall any notice
         or  announcement  have  been  given  or  made of (i)  any  intended  or
         potential  downgrading or (ii) any review or possible  change that does
         not indicate an  improvement,  in the rating accorded any securities of
         or guaranteed by the Company by any "nationally  recognized statistical
         rating  organization,"  as that term is defined in Rule 436(g)(2) under
         the Act.

                  (j) The  Company  will,  at the  time of  purchase  and at the
         additional  time of  purchase,  as the  case may be,  deliver  to you a
         certificate  of two of its  executive  officers  to the effect that the
         representations  and  warranties  of the  Company  as set forth in this
         Agreement  are true and  correct as of such date,  that the Company has
         performed  such of its  obligations  under this  Agreement as are to be
         performed at or before the time of purchase and the additional  time of
         purchase,  as the  case  may  be,  and  the  conditions  set  forth  in
         paragraphs (g), (h) and (i) of this Section 6 have been met.



                                       28


                  (k) The  Company  will,  at the  time of  purchase  and at the
         additional  time of  purchase,  as the  case may be,  deliver  to you a
         certificate  signed by the  President of the Company  substantially  in
         such form approved by you and counsel to the  Underwriters,  respecting
         the Company's compliance,  both prior to and after giving effect to the
         transactions  contemplated  hereby, and certain matters relating to the
         Company and the Subsidiaries.

                  (l) The Securities shall have been approved for listing on the
         New York Stock  Exchange,  such listing to be effective  within  thirty
         days of the date hereof.

                  (m) The Company,  the Sponsor,  the  Trustees,  the  Guarantee
         Trustee and the Debenture Trustee shall have executed and delivered the
         Company Agreements.

                  The Company shall have furnished to you such other documents
and certificates as to the accuracy and completeness of any statement in the
Registration Statement and the Prospectus as of the time of purchase and the
additional time of purchase, as the case may be, as you may reasonably request.

                  7.  Effective Date of Agreement;  Termination.  This Agreement
shall become  effective when the parties hereto have executed and delivered this
Agreement.

                  The obligations of the several Underwriters hereunder shall be
subject  to  termination  in the  absolute  discretion  of you or any  group  of
Underwriters  (which  may  include  you)  which has  agreed to  purchase  in the
aggregate  at  least  50% of the  Firm  Securities  (i) if,  since  the  time of
execution of this Agreement or the respective  dates as of which  information is
given in the  Registration  Statement  and  Prospectus,  (y)  there has been any
material adverse and unfavorable  change,  financial or otherwise (other than as
referred to in the  Registration  Statement  and  Prospectus),  in the business,
prospects,   properties,  condition  (financial  or  otherwise)  or  results  of
operations of the Company and the Subsidiaries taken as a whole, which would, in
your  judgment  or in the  judgment  of  such  group  of  Underwriters,  make it
impracticable  to market the  Securities,  or (z) there shall have  occurred any
downgrading,  or any  notice  shall  have  been  given  of (a) any  intended  or
potential  downgrading  or (b) any  review  or  possible  change  that  does not
indicate an improvement,  in the rating accorded any securities of or guaranteed
by  the  Company  or  any of its  subsidiaries  by  any  "nationally  recognized
statistical  rating  organization",  as that term is defined  in Rule  436(g)(2)
under  the Act or (ii) if,  at any time  prior to the time of  purchase  and the
additional  time of purchase,  as the case may be,  trading in securities on the
New York Stock  Exchange,  the American  Stock Exchange or the Nasdaq shall have
been suspended or  limitations or minimum prices shall have been  established on
the New York Stock Exchange,  the American Stock Exchange or the Nasdaq or (iii)
if,  at any time  prior  to the  time of  purchase  and the  additional  time of
purchase,  as the case may be, a banking  moratorium  shall  have been  declared
either by the United  States or New York State  authorities,  or (iv) if, at any
time prior


                                       29


to the time of purchase and the additional time of purchase, as the case may be,
the United States shall have declared war in accordance with its  constitutional
processes or there shall have  occurred any material  outbreak or  escalation of
hostilities  or other  national  or  international  calamity  or  crisis of such
magnitude  in its effect on the  financial  markets of the United  States as, in
your  judgment  or in the  judgment  of such group of  Underwriters,  to make it
impracticable to market the Securities.

                  If you or any group of  Underwriters  elects to terminate this
Agreement as provided in this Section 7, the Offerors and each other Underwriter
shall be notified promptly by letter, telegram or telecopy.

                  If  the  sale  to  the  Underwriters  of  the  Securities,  as
contemplated by this Agreement,  is not carried out by the  Underwriters for any
reason permitted under this Agreement or if such sale is not carried out because
the Offerors shall be unable to comply with any of the terms of this  Agreement,
the Offerors shall not be under any obligation or liability under this Agreement
(except  to the  extent  provided  in  Sections  4,  5 and 9  hereof),  and  the
Underwriters  shall be under no  obligation  or liability to the Offerors  under
this  Agreement  (except to the extent  provided  in Section 9 hereof) or to one
another hereunder.

                  8. Increase in Underwriters' Commitments.  Subject to Sections
6 and 7, if any  Underwriter  shall default in its obligation to take up and pay
for the Securities to be purchased by it hereunder  (otherwise  than for reasons
sufficient to justify the  termination of this Agreement under the provisions of
Section  7  hereof)  and  if  the  principal  amount  of  Securities  which  all
Underwriters  so defaulting  shall have agreed but failed to take up and pay for
does not exceed 10% of the total aggregate  principal amount of Securities,  the
non-defaulting  Underwriters  shall  take up and pay  for  (in  addition  to the
principal  amount of  Securities  they are  obligated  to  purchase  pursuant to
Section 1 hereof) the principal  amount of Securities  agreed to be purchased by
all such defaulting Underwriters, as hereinafter provided. Such Securities shall
be taken up and paid for by such  non-defaulting  Underwriter or Underwriters in
such  principal  amount or amounts as you may designate with the consent of each
Underwriter  so designated or, in the event no such  designation  is made,  such
Securities shall be taken up and paid for by all non-defaulting Underwriters pro
rata in proportion to the aggregate  principal amount of Securities set opposite
the names of such non-defaulting Underwriters in Schedule A.

                  If a new  Underwriter or  Underwriters  are substituted by the
Underwriters or by the Offerors for a defaulting  Underwriter or Underwriters in
accordance  with the  foregoing  provision,  the  Offerors or you shall have the
right to postpone the time of purchase and the additional  time of purchase,  as
the case may be, for a period not exceeding five business days in order that any
necessary changes in the Prospectus and other documents may be effected.



                                       30


                  The term  Underwriter as used in this agreement shall refer to
and include any Underwriter substituted under this Section 8 with like effect as
if such substituted Underwriter had originally been named in Schedule A.

                  If the  aggregate  principal  amount of  Securities  which the
defaulting  Underwriter or  Underwriters  agreed to purchase  exceeds 10% of the
total aggregate  principal amount of Securities which all Underwriters agreed to
purchase  hereunder,  and if neither  the  non-defaulting  Underwriters  nor the
Offerors  shall make  arrangements  within the five  business day period  stated
above for the purchase of all the Securities which the defaulting Underwriter or
Underwriters  agreed to purchase  hereunder,  this Agreement shall be terminated
without  further  act or deed  and  without  any  liability  on the  part of the
Offerors to any non-defaulting Underwriter and without any liability on the part
of any  non-defaulting  Underwriter to the Offerors.  Nothing in this paragraph,
and no action taken  hereunder,  shall relieve any defaulting  Underwriter  from
liability in respect of any default of such Underwriter under this Agreement.

                  9. Indemnity and Contribution.

                  (a) The Company and the Trust, jointly and severally, agree to
indemnify, defend and hold harmless each Underwriter,  its partners,  directors,
officers,  employees  and agents and any person  who  controls  any  Underwriter
within the meaning of Section 15 of the Act or Section 20 of the  Exchange  Act,
and the successors and assigns of all of the foregoing  persons from and against
any loss, damage, expense,  liability or claim (including the reasonable cost of
investigation)  which,  jointly or severally,  any such  Underwriter or any such
person may incur under the Act, the Exchange  Act, the common law or  otherwise,
insofar as such loss,  damage,  expense,  liability or claim arises out of or is
based upon (i) any untrue  statement or alleged  untrue  statement of a material
fact  contained  in  the  Registration  Statement,  the  Basic  Prospectus,  any
Prepricing Prospectus, the Prospectus Supplement or in the Prospectus (or in any
of the  foregoing  as the same may at any time be amended or  supplemented),  or
arises  out of or is based upon any  omission  or  alleged  omission  to state a
material fact  required to be stated in the  Registration  Statement,  the Basic
Prospectus,   any  Prepricing  Prospectus,  the  Prospectus  Supplement  or  the
Prospectus (or in any of the foregoing as the same may at any time be amended or
supplemented)  or necessary to make the statements  made therein not misleading,
except insofar as any such loss, damage, expense,  liability or claim arises out
of or is based  upon any  untrue  statement  or alleged  untrue  statement  of a
material fact contained in and in conformity with information furnished by or on
behalf of any  Underwriter  through you to the Offerors  expressly  for use with
reference  to  such  Underwriter  in  the  Registration  Statement,   the  Basic
Prospectus,   any  Prepricing  Prospectus,  the  Prospectus  Supplement  or  the
Prospectus (or in any of the foregoing as the same may at any time be amended or
supplemented) or arises out of or is based upon any omission or alleged omission
to state a material  fact in  connection  with such  information


                                       31


required to be stated in the Registration Statement,  the Basic Prospectus,  any
Prepricing Prospectus, the Prospectus Supplement or the Prospectus (or in any of
the  foregoing  as the same  may at any  time be  amended  or  supplemented)  or
necessary to make such  information not misleading or (ii) any untrue  statement
or alleged untrue  statement made by the Offerors in Section 3 of this Agreement
or the failure by the Offerors to perform when and as required any  agreement or
covenant  contained  herein or (iii) any  untrue  statement  or  alleged  untrue
statement  of any  material  fact  contained  in any audio or  visual  materials
provided by the  Offerors or based upon written  information  furnished by or on
behalf of the Offerors including,  without limitation,  slides,  videos,  films,
tape  recordings,  used in  connection  with the  marketing  of the  Securities;
provided,  however,  that,  solely  with  regard to clause  (i),  the  foregoing
indemnity   agreement  with  respect  to  any  Basic  Prospectus  or  Prepricing
Prospectus  shall  not inure to the  benefit  of any  Underwriter  from whom the
person  asserting  such  losses,   claims,   damages  or  liabilities  purchased
Securities,  or any person controlling the Underwriter,  if sufficient copies of
the Prospectus were timely delivered to such  Underwriter  pursuant to Section 4
hereof and a copy of the  Prospectus  (as then  amended or  supplemented  if the
Company shall have  furnished any  amendments  or  supplements  thereto) was not
given or sent to such person,  if required by law to have been delivered,  at or
prior to the written  confirmation of the sale of the Securities to such person,
and if the  Prospectus  (as so  amended  or  supplemented)  would have cured the
defect giving rise to such losses, claims, damages or liabilities.

                  If any action, suit or proceeding  (together,  a "Proceeding")
is  brought  against  an  Underwriter  or any such  person in  respect  of which
indemnity  may  be  sought  against  the  Offerors  pursuant  to  the  foregoing
paragraph, such Underwriter or such person shall promptly notify the Offerors in
writing of the  institution of such Proceeding and the Offerors shall assume the
defense of such  Proceeding,  including  the  employment  of counsel  reasonably
satisfactory  to such  indemnified  party and payment of all fees and  expenses;
provided, however, that the omission to so notify the Offerors shall not relieve
the Offerors from any liability  which the Offerors may have to any  Underwriter
or any such person or otherwise.  Such Underwriter or such person shall have the
right to employ  its or their own  counsel  in any such  case,  but the fees and
expenses of such counsel shall be at the expense of such  Underwriter or of such
person  unless the  employment  of such counsel  shall have been  authorized  in
writing by the Offerors in connection with the defense of such Proceeding or the
Offerors  shall not  have,  within a  reasonable  period of time in light of the
circumstances  employed counsel to have charge of the defense of such Proceeding
or such indemnified party or parties shall have reasonably  concluded that there
may be defenses available to it or them which are different from,  additional to
or in conflict with those  available to the Offerors (in which case the Offerors
shall not have the right to direct the defense of such  Proceeding  on behalf of
the indemnified party or parties), in any of which events such fees and expenses
shall be borne  by the  Offerors  and paid as  incurred  (it  being  understood,
however, that the Offerors shall not be liable for the expenses of more than one
separate  counsel (in addition to


                                       32


any local counsel) in any one Proceeding or series of related Proceedings in the
same jurisdiction  representing the indemnified  parties who are parties to such
Proceeding).  The Offerors  shall not be liable for any  settlement  of any such
Proceeding  effected without its written consent but if settled with the written
consent of the Offerors,  the Offerors  agree to indemnify and hold harmless any
Underwriter and any such person from and against any loss or liability by reason
of such settlement.  Notwithstanding the foregoing  sentence,  if at any time an
indemnified  party shall have requested an  indemnifying  party to reimburse the
indemnified party for fees and expenses of counsel as contemplated by the second
sentence of this paragraph,  then the indemnifying party agrees that it shall be
liable for any settlement of any Proceeding effected without its written consent
if (i) such  settlement is entered into more than 60 business days after receipt
by such  indemnifying  party of the aforesaid  request,  (ii) such  indemnifying
party shall not have  reimbursed the  indemnified  party in accordance with such
request prior to the date of such  settlement and (iii) such  indemnified  party
shall have given the  indemnifying  party at least 30 days' prior  notice of its
intention to settle.  No  indemnifying  party shall,  without the prior  written
consent of the  indemnified  party,  effect  any  settlement  of any  pending or
threatened Proceeding in respect of which any indemnified party is or could have
been a party and indemnity could have been sought  hereunder by such indemnified
party,  unless  such  settlement  includes  an  unconditional  release  of  such
indemnified  party from all  liability on claims that are the subject  matter of
such  Proceeding  and does not include an admission of fault,  culpability  or a
failure to act, by or on behalf of such indemnified party.

                  (b) Each Underwriter severally agrees to indemnify, defend and
hold  harmless  each of the  Company  and the  Trust,  its  trustees,  officers,
employees and agents, and any person who controls the Company within the meaning
of Section 15 of the Act, or Section 20 of the  Exchange  Act,  from and against
any loss, damage, expense,  liability or claim (including the reasonable cost of
investigation) which, jointly or severally,  the Offerors or any such person may
incur under the Act, the Exchange  Act, or common law or  otherwise,  insofar as
such loss,  damage,  expense,  liability or claim arises out of or is based upon
any untrue statement or alleged untrue statement of a material fact contained in
and in conformity with information furnished by or on behalf of such Underwriter
through you to the Offerors expressly for use with reference to such Underwriter
in the Registration Statement, the Basic Prospectus,  any Prepricing Prospectus,
the  Prospectus  Supplement or in the  Prospectus (or in any of the foregoing as
such document may at any time be amended or supplemented) or arises out of or is
based  upon  any  omission  or  alleged  omission  to state a  material  fact in
connection  with such  information  required  to be  stated in the  Registration
Statement,  the Basic  Prospectus,  any  Prepricing  Prospectus,  the Prospectus
Supplement or the Prospectus (or in any of the foregoing as such document may at
any time be amended or  supplemented)  or necessary to make such information not
misleading.



                                       33


                  If any Proceeding is brought  against the Offerors or any such
person in respect  of which  indemnity  may be sought  against  any  Underwriter
pursuant to the foregoing paragraph,  the Offerors or such person shall promptly
notify such  Underwriter in writing of the  institution  of such  Proceeding and
such  Underwriter  shall assume the defense of such  Proceeding,  including  the
employment of counsel  reasonably  satisfactory  to such  indemnified  party and
payment of all fees and  expenses,  provided,  however,  that the omission to so
notify such  Underwriter  shall not relieve such  Underwriter from any liability
which such Underwriter may have to the Offerors or any such person or otherwise.
The  Offerors or such  person  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 the Offerors or such person unless the  employment of such counsel shall have
been authorized in writing by such Underwriter in connection with the defense of
such  Proceeding or such  Underwriter  shall not have  employed  counsel to have
charge of the defense of such  Proceeding or such  indemnified  party or parties
shall have  reasonably  concluded that there may be defenses  available to it or
them  which are  different  from or  additional  to or in  conflict  with  those
available to such Underwriter (in which case such Underwriter shall not have the
right to direct the  defense  of such  Proceeding  on behalf of the  indemnified
party or parties, but such Underwriter may employ counsel and participate in the
defense  thereof  but the  fees and  expenses  of such  counsel  shall be at the
expense of such  Underwriter),  in any of which  events  such fees and  expenses
shall be borne by such  Underwriter  and paid as incurred (it being  understood,
however, that such Underwriter shall not be liable for the expenses of more than
one separate counsel (in addition to any local counsel) in any one Proceeding or
series  of  related  Proceedings  in  the  same  jurisdiction  representing  the
indemnified parties who are parties to such Proceeding). No Underwriter shall be
liable for any settlement of any such  Proceeding  effected  without the written
consent of such  Underwriter  but if settled  with the  written  consent of such
Underwriter, such Underwriter agrees to indemnify and hold harmless the Offerors
and any such person from and  against  any loss or  liability  by reason of such
settlement.   Notwithstanding  the  foregoing  sentence,   if  at  any  time  an
indemnified  party shall have requested an  indemnifying  party to reimburse the
indemnified party for fees and expenses of counsel as contemplated by the second
sentence of this paragraph,  then the indemnifying party agrees that it shall be
liable for any settlement of any Proceeding effected without its written consent
if (i) such  settlement is entered into more than 60 business days after receipt
by such  indemnifying  party of the aforesaid  request,  (ii) such  indemnifying
party shall not have  reimbursed the  indemnified  party in accordance with such
request prior to the date of such  settlement and (iii) such  indemnified  party
shall have given the  indemnifying  party at least 30 days' prior  notice of its
intention to settle.  No  indemnifying  party shall,  without the prior  written
consent of the  indemnified  party,  effect  any  settlement  of any  pending or
threatened Proceeding in respect of which any indemnified party is or could have
been a party and indemnity could have been sought  hereunder by such indemnified
party,  unless  such  settlement  includes  an  unconditional  release  of  such
indemnified  party from all  liability on claims that are the subject  matter of
such Proceeding.



                                       34


                  (c) If the  indemnification  provided for in this Section 9 is
unavailable  to an  indemnified  party  under  subsections  (a)  and (b) of this
Section 9 in respect of any  losses,  damage,  expenses,  liabilities  or claims
referred  to  therein,  then  each  applicable  indemnifying  party,  in lieu of
indemnifying  such  indemnified  party,  shall  contribute to the amount paid or
payable by such indemnified party as a result of such losses, damages, expenses,
liabilities  or claims (i) in such  proportion as is  appropriate to reflect the
relative  benefits received by the Offerors on the one hand and the Underwriters
on the other hand from the offering of the  Securities or (ii) if the allocation
provided  by clause  (i)  above is not  permitted  by  applicable  law,  in such
proportion as is appropriate to reflect not only the relative  benefits referred
to in clause (i) above but also the  relative  fault of the  Offerors on the one
hand and of the  Underwriters  on the other in connection with the statements or
omissions  which  resulted in such losses,  damages,  expenses,  liabilities  or
claims,  as well as any other relevant  equitable  considerations.  The relative
benefits  received by the Offerors on the one hand and the  Underwriters  on the
other  shall be  deemed  to be in the same  respective  proportion  as the total
proceeds from the offering (net of  underwriting  discounts and  commissions but
before deducting  expenses)  received by the Offerors and the total underwriting
discounts and commissions  received by the  Underwriters,  bear to the aggregate
public offering price of the  Securities.  The relative fault of the Offerors on
the one  hand and of the  Underwriters  on the  other  shall  be  determined  by
reference to, among other things, whether the untrue statement or alleged untrue
statement  of a  material  fact or  omission  or  alleged  omission  relates  to
information  supplied by the  Offerors or by the  Underwriters  and the parties'
relative intent, knowledge,  access to information and opportunity to correct or
prevent such  statement or omission.  The amount paid or payable by a party as a
result of the losses, damages,  expenses,  liabilities and claims referred to in
this  subsection  shall be deemed to include any legal or other fees or expenses
reasonably incurred by such party in connection with investigating, preparing to
defend or defending any claim or Proceeding.

                  (d) The Offerors and the Underwriters  agree that it would not
be just and equitable if contribution pursuant to this Section 9 were determined
by pro rata allocation (even if the Underwriters  were treated as one entity for
such purpose) or by any other method of allocation that does not take account of
the   equitable   considerations   referred   to  in   subsection   (c)   above.
Notwithstanding  the  provisions  of this  Section  9, no  Underwriter  shall be
required  to  contribute  any  amount in excess of the amount by which the total
price at which the Securities  underwritten by such  Underwriter and distributed
to the public were offered to the public  exceeds the amount of any damage which
such  Underwriter  has  otherwise  been required to pay by reason of such untrue
statement or alleged untrue statement or omission or alleged omission. No person
guilty of fraudulent  misrepresentation  (within the meaning of Section 11(f) of
the Act) shall be entitled to contribution from any person who was not guilty of
such fraudulent  misrepresentation.  The Underwriters' obligations to contribute
pursuant  to this  Section  9 are  several  in  proportion  to their  respective
underwriting commitments and not joint.



                                       35


                  (e) The indemnity  and  contribution  agreements  contained in
this Section 9 and the covenants, warranties and representations of the Offerors
contained in this Agreement shall remain in full force and effect  regardless of
any  investigation  made  by or on  behalf  of any  Underwriter,  its  partners,
directors,  officers, employees or agents or any person (including each partner,
officer,  director,   employee  or  agent  of  such  person)  who  controls  any
Underwriter  within  the  meaning  of Section 15 of the Act or Section 20 of the
Exchange  Act,  or by or on  behalf of the  Offerors,  its  trustees,  officers,
employees or agents or any person who  controls the Offerors  within the meaning
of Section 15 of the Act or Section 20 of the Exchange  Act,  and shall  survive
any  termination  of  this  Agreement  or  the  issuance  and  delivery  of  the
Securities.  The Offerors  and each  Underwriter  agree  promptly to notify each
other of the  commencement of any Proceeding  against it and, in the case of the
Offerors, against any of the Offerors's trustees,  officers, employees or agents
in  connection  with the issuance and sale of the  Securities,  or in connection
with the Registration Statement or Prospectus.

                  10.  Notices.   Except  as  otherwise  herein  provided,   all
statements,  requests, notices and agreements shall be in writing or by telegram
and, if to the Underwriters, shall be sufficient in all respects if delivered or
sent to UBS Warburg LLC, 299 Park Avenue,  New York, New York 10171,  Attention:
Syndicate  Department,  with a copy to Dewey  Ballantine LLP, 1301 Avenue of the
Americas, New York, New York 10019, Attention: Glenn R. Pollner, Esq., if to the
Company, shall be sufficient in all respects if delivered or sent to the Company
at the offices of the Company c/o Senior Housing  Properties Trust at 400 Centre
Street, Newton,  Massachusetts 02458,  Attention:  David J. Hegarty,  President,
with a copy to  Sullivan  &  Worcester  LLP,  One Post  Office  Square,  Boston,
Massachusetts 02109,  Attention:  Alexander A. Notopoulos,  Jr., Esq., and if to
the Trust at 400 Centre Street, Newton, Massachusetts 02458, Attention: Barry M.
Portnoy,  with a copy to  Sullivan &  Worcester  LLP,  Attention:  Alexander  A.
Notopoulos, Jr., Esq.

                  11. Governing Law; Construction. This Agreement and any claim,
counterclaim  or dispute of any kind or nature  whatsoever  arising out of or in
any way relating to this Agreement (a "Claim"), directly or indirectly, shall be
governed by, and  construed  in  accordance  with,  the laws of the State of New
York.  The Section  headings in this Agreement have been inserted as a matter of
convenience of reference and are not a part of this Agreement.

                  12. Submission to Jurisdiction.  Except as set forth below, no
Claim may be  commenced,  prosecuted  or  continued  in any court other than the
courts of the State of New York located in the City and County of New York or in
the United States  District Court for the Southern  District of New York,  which
courts shall have  jurisdiction  over the adjudication of such matters,  and the
Offerors  consent to the  jurisdiction of such courts and personal  service with
respect thereto. The Offerors hereby consent to personal  jurisdiction,  service
and


                                       36


venue in any court in which any Claim  arising out of or in any way  relating to
this  Agreement  is brought by any third  party  against an  Underwriter  or any
indemnified  party. Each  Underwriter,  the Company and the Trust (on its behalf
and, to the extent  permitted by applicable  law, on behalf of its  stockholders
and affiliates)  waives all right to trial by jury in any action,  proceeding or
counterclaim (whether based upon contract, tort or otherwise) in any way arising
out of or relating to this  Agreement.  The Offerors agree that a final judgment
in any such action,  proceeding or counterclaim  brought in any such court shall
be  conclusive  and binding  upon the  Offerors and may be enforced in any other
courts in the jurisdiction of which the Offerors are or may be subject,  by suit
upon such judgment.

                  13.  Parties at Interest.  The Agreement  herein set forth has
been and is made solely for the benefit of the  Underwriters,  the Company,  the
Trust and to the extent  provided in Section 9 hereof the  controlling  persons,
directors and officers and, if applicable, trustees referred to in such Section,
and their respective successors,  assigns,  heirs, personal  representatives and
executors and  administrators.  No other  person,  partnership,  association  or
corporation  (including  a  purchaser,  as  such  purchaser,  from  any  of  the
Underwriters)  shall  acquire  or have  any  right  under or by  virtue  of this
Agreement.

                  14. Information Furnished by the Underwriters.  The statements
set forth in the last  sentence on the last  paragraph  on the cover page of the
Prospectus  Supplement and the statements set forth in the first,  third, fifth,
seventh and eighth paragraph under the caption  "Underwriting" in the Prospectus
Supplement  constitute  the only  information  furnished  by or on behalf of the
Underwriters as such information is referred to in Sections 3 and 9 hereof.

                  15. Counterparts.  This Agreement may be signed by the parties
in one or more  counterparts  that together  shall  constitute  one and the same
agreement among the parties.

                  16.  Successors and Assigns.  This Agreement  shall be binding
upon the Underwriters,  the Company,  the Trust and their respective  successors
and  assigns  and any  successor  or assign of any  substantial  portion  of the
Company's, the Trust's and any of the Underwriters' respective businesses and/or
assets.

                  17.  Miscellaneous.  UBS Warburg,  an  indirect,  wholly-owned
subsidiary  of UBS AG, is not a bank and is separate from any  affiliated  bank,
including  any U.S.  branch or agency of UBS  Warburg.  Because UBS Warburg is a
separately incorporated entity, it is solely responsible for its own contractual
obligations and  commitments,  including  obligations  with respect to sales and
purchases of securities.  Securities sold, offered or recommended by UBS Warburg
are not deposits,  are not insured by the Federal Deposit Insurance Corporation,
are not guaranteed by a branch or agency, and are not otherwise an obligation or
responsibility of a branch or agency.



                                       37


                  A  lending   affiliate   of  UBS  Warburg  may  have   lending
relationships with issuers of securities underwritten or privately placed by UBS
Warburg.  To the extent  required under the securities  laws,  prospectuses  and
other  disclosure  documents for securities  underwritten or privately placed by
UBS Warburg will  disclose the existence of any such lending  relationships  and
whether the proceeds of the issue will be used to repay debts owed to affiliates
of UBS Warburg.

                  THE ARTICLES OF AMENDMENT AND RESTATEMENT  ESTABLISHING SENIOR
HOUSING  PROPERTIES  TRUST,  DATED SEPTEMBER 2, 1999, A COPY OF WHICH,  TOGETHER
WILL ALL  AMENDMENTS  THERETO,  IS DULY FILED IN THE OFFICE OF THE DEPARTMENT OF
ASSESSMENTS  AND  TAXATION  OF THE  STATE OF  MARYLAND,  PROVIDES  THAT THE NAME
"SENIOR HOUSING  PROPERTIES  TRUST" REFERS TO THE TRUSTEES UNDER THE DECLARATION
OF TRUST,  BUT NOT  INDIVIDUALLY  OR PERSONALLY,  AND THAT NO TRUSTEE,  OFFICER,
SHAREHOLDER,  EMPLOYEE OR AGENT OF SENIOR HOUSING PROPERTIES TRUST SHALL BE HELD
TO ANY PERSONAL  LIABILITY,  FOR ANY  OBLIGATION  OF, OR CLAIM  AGAINST,  SENIOR
HOUSING  PROPERTIES  TRUST.  ALL PERSONS DEALING WITH SENIOR HOUSING  PROPERTIES
TRUST,  SHALL LOOK ONLY TO THE ASSETS OF SENIOR HOUSING PROPERTIES TRUST FOR THE
PAYMENT OF ANY SUM OR THE PERFORMANCE OF ANY OBLIGATION.


                                       38


                  If  the  foregoing  correctly  sets  forth  the  understanding
between each of the Underwriters,  the Company, the Sponsor and the Trust please
so indicate in the space provided  below for the purpose,  whereupon this letter
and  your  acceptance   shall  constitute  a  binding   agreement   between  the
Underwriters severally, the Company and the Trust.

                                Very truly yours,

                                SNH CAPITAL TRUST HOLDINGS,
                                On behalf and as sponsor of SNH Capital Trust I


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


                               SNH CAPITAL TRUST I



                               By:  /s/ Barry M. Portnoy
                                    Name:  Barry M. Portnoy
                                    Title:  Trustee


                               SENIOR HOUSING PROPERTIES TRUST


                               By:  /s/ David J. Hegarty
                                    Name:  David J. Hegarty
                                    Title: President and Chief Operating Officer







Accepted and agreed to as of the date first above written:

UBS WARBURG LLC
SALOMON SMITH BARNEY INC.
A.G. EDWARDS & SONS, INC.
FIRST UNION SECURITIES, INC.
PRUDENTIAL SECURITIES INCORPORATED
CREDIT SUISSE FIRST BOSTON CORPORATION
TUCKER ANTHONY INCORPORATED

By:   UBS WARBURG LLC


By:   /s/ William McGahan
      Name:  William McGahan
      Title:  Managing Director



By:   /s/ John Doherty
      Name:  John Doherty
      Title:  Director






                                   SCHEDULE A





                                                                                     Number of Firm Securities
Underwriters                                                                              to be Purchased

                                                                                             
UBS Warburg LLC..............................................................                   158,804
Salomon Smith Barney Inc. ...................................................                   158,800
A.G. Edwards & Sons, Inc. ...................................................                   158,800
First Union Securities, Inc. ................................................                   158,800
Prudential Securities Incorporated ..........................................                   158,800
Credit Suisse First Boston Corporation ......................................                    53,000
Tucker Anthony Incorporated .................................................                    53,000
Blaylock & Partners, L.P.....................................................                     8,333
Boenning & Scattergood, Inc..................................................                     8,333
CIBC World Markets Corp......................................................                     8,333
Fahnestock & Co. Inc.........................................................                     8,333
Janney Montgomery Scott LLC..................................................                     8,333
McDonald Investments Inc.....................................................                     8,333
McGinn, Smith & Co. Inc......................................................                     8,333
Mesirow Financial Inc........................................................                     8,333
The Robinson-Humphrey Company, LLC...........................................                     8,333
The Williams Capital Group, L.P..............................................                     8,333
U.S. Bancorp Piper Jaffray Inc...............................................                     8,333
Utendahl Capital Partners, L.P...............................................                     8,333
                                                                                 -----------------------------------

                                            Total............................... ==================================
                                                                                             1,000,000







                                 SCHEDULE A - 1






                                   SCHEDULE B

Subsidiary Name
HRES1 Properties Trust
HRES2 Properties Trust
SHOPCO Holdings, Inc.
SHOPCO-AZ, LLC
SHOPCO-CA, LLC
SHOPCO-COLORADO, LLC
SHOPCO-CT, LLC
SHOPCO-GA, LLC
SHOPCO-IA, LLC
SHOPCO-KS, LLC
SHOPCO-LA, LLC
SHOPCO-MA, LLC
SHOPCO-MI, LLC
SHOPCO-MO, LLC
SHOPCO-NC, LLC
SHOPCO-NE, LLC
SHOPCO-PA, LLC
SHOPCO-SD, LLC
SHOPCO-WI, LLC
SHOPCO-WY, LLC
SNH-CALIFORNIA, INC.
SNH Capital Trust Holdings
SNH Capital Trust I
SNH Capital Trust II
SNH Capital Trust III
SNH-IOWA, INC.
SNH Holding Co., Inc.
SNH-MICHIGAN, INC.
SNH-NEBRASKA, INC.
SPTGEN Properties Trust
SPTIHS Properties Trust
SPTMISC Properties Trust
SPTMNR Properties Trust
SPTMRT Properties Trust
SPTSUN Properties Trust
SPTSUN II Properties Trust


                                 SCHEDULE B - 1






                                   SCHEDULE C

Material Subsidiaries

HRES1 Properties Trust
SPTMRT Properties Trust


                                 SCHEDULE C - 1






                                   SCHEDULE D

Maryland Subsidiaries

HRES1 Properties Trust
HRES2 Properties Trust
SNH Capital Trust Holdings
SNH Capital Trust I
SNH Capital Trust II
SNH Capital Trust III
SPTGEN Properties Trust
SPTIHS Properties Trust
SPTMISC Properties Trust
SPTMNR Properties Trust
SPTMRT Properties Trust
SPTSUN Properties Trust
SPTSUN II Properties Trust


- --------
1        As used  herein  "business  day" shall mean a day on which the New York
         Stock Exchange is open for trading.



                                 SCHEDULE D - 1