EXHIBIT 10.8

                  GUARANTY BY INTEGRATED HEALTH SERVICES, INC.

                  GUARANTY dated as of January 1, 2000 made by INTEGRATED HEALTH
SERVICES,  INC.,  a  Delaware  corporation   ("Guarantor")  in  favor  of  HRES1
PROPERTIES  TRUST, a Maryland real estate  investment  trust (with its successor
and assigns, "Landlord").

                              W I T N E S S E T H :
                               - - - - - - - - - -

         WHEREAS,  Landlord  and IHS  Acquisition  No.  135,  Inc.,  a  Delaware
corporation  ("IHS 135") are parties to a Lease  Agreement  dated as of February
11, 1994, as amended (the "Original Lease"),  originally between HRPT Properties
Trust (f/k/a  "Health and  Rehabilitation  Properties  Trust"),  a Maryland real
estate  investment  trust  ("HRPT"),   as  landlord,   and  Horizon   Healthcare
Corporation, a Delaware corporation ("Horizon"), as tenant;

         WHEREAS,  Landlord  has  succeeded  to the interest of HRPT as landlord
under the Original Lease;

         WHEREAS,  pursuant to an  Assignment  and  Assumption  of Real Property
Lease  dated as of  December  31,  1997 by and  between  Horizon/CMS  Healthcare
Corporation  (the successor to Horizon),  as assignor,  and IHS  Acquisition No.
151, Inc., a Delaware corporation ("IHS 151"), as assignee, IHS 151 acquired all
right,  title and  interest  of  Horizon/CMS  Healthcare  Corporation  under the
Original Lease;

          WHEREAS,  pursuant to an  Assignment  and  Assumption of Real Property
Lease dated as of December 31, 1997 by and between IHS 151, as assignor, and IHS
135, as  assignee,  IHS 135  acquired  all right,  title and interest of IHS 151
under the Original Lease;

         WHEREAS, pursuant to a Consent, Assumption and Guaranty Agreement dated
as of December 31, 1997 (the "IHS Consent") among Guarantor, IHS 135 and certain
other  subsidiaries of Guarantor,  HealthSouth  Corporation,  Horizon,  HRPT and
Indemnity Collection Corporation,  Guarantor and IHS 135 assumed the obligations
of Horizon under the Original Lease;

         WHEREAS,  Landlord  claims that by a notice  dated  January  25,  2000,
Landlord notified IHS 135 that the Original Lease was terminated by virtue of an
Event of Default under the Original Lease;

         WHEREAS,   on   February  3,  2000,   Guarantor   and  certain  of  its
subsidiaries,   including  IHS  135,  filed   voluntary   petitions  for  relief
(collectively,  the "Cases")  under chapter 11 of the United  States  Bankruptcy
Code,  ss.ss.101  et  seq.  (the  "Bankruptcy  Code")  with  the  United  States
Bankruptcy Court for the District of Delaware (the "Bankruptcy Court");

         WHEREAS,  Guarantor  and  IHS  135  are  continuing  to  operate  their
businesses  and manage  their  respective  properties  as  debtors-in-possession
pursuant to ss.ss.1107 and 1108 of the Bankruptcy Code;


         WHEREAS,  pursuant to, and in accordance  with, a Settlement  Agreement
dated as of April 11, 2000 among,  inter alia,  Guarantor,  Landlord and IHS 135
(as amended,  amended and restated,  modified or supplemented from time to time,
the  "Settlement  Agreement"),  Landlord  has  agreed  to  rescind  its  alleged
termination of the Original Lease, Landlord and IHS 135 have agreed to amend and
restate  the  Original  Lease as set  forth in an  Amended  and  Restated  Lease
Agreement  dated as of even date  herewith  (as amended,  amended and  restated,
modified or  supplemented  from time to time,  the "Lease")  between IHS 135 and
Landlord,  and Guarantor has agreed to guaranty the obligations of IHS 135 under
the Lease;

         NOW, THEREFORE, in consideration of the premises and for other good and
valuable   consideration,   the  receipt  and   adequacy  of  which  are  hereby
acknowledged, Guarantor hereby agrees with Landlord as follows:

1. Defined Terms.  Unless otherwise  defined herein,  terms which are defined in
the Lease and used herein are so used as so defined. In addition,  the following
terms shall have the meanings set forth below:

                  "Consolidated  Financials"  shall mean, for any fiscal year or
         other accounting period of Guarantor and its consolidated Subsidiaries,
         its annual Form 10-K and quarterly  Form 10-Q prepared  pursuant to the
         Securities  and  Exchange  Act  of  1934,  as  amended,  or  comparable
         financial statement.

                  "Lease Documents" shall mean, collectively,  the Lease and any
         sublease  or  assumption  of lease  entered  into by a  Related  Entity
         pursuant  to Article 17 of the Lease,  as any of the same may from time
         to time be amended, modified or supplemented.

                   "Material  Adverse Effect" means a material adverse effect on
         (a)  the  business,  operations,   property,  condition  (financial  or
         otherwise)  or prospects of Guarantor and its  Subsidiaries  taken as a
         whole,  (b) the ability of Guarantor to perform its  obligations  under
         this Guaranty,  or (c) the validity or enforceability of this Guaranty,
         or the rights of Landlord hereunder.

                  "Obligations"  shall mean the payment and  performance of each
         and every  obligation  and  liability  of Tenant  (and each of them) to
         Landlord  under any Lease  Document,  whether now existing or hereafter
         arising or created, joint or several,  direct or indirect,  absolute or
         contingent,  due or to become due, matured or unmatured,  liquidated or
         unliquidated,  arising by contract,  operation of law or otherwise, and
         including,  without  limitation,  all Minimum Rent and Additional  Rent
         under the Lease, and all fees and charges,  and all costs and expenses,
         payable under any Lease Document.

                   "Subsidiary"  shall mean any  corporation  of which more than
         fifty percent of the  outstanding  capital stock having ordinary voting
         power to elect a majority of the Board of Directors of such corporation
         (irrespective  of whether or not at the time capital stock of any other
         class or classes of such  corporation  shall or might have voting power
         upon the  occurrence  of any  contingency)  is at the time  directly or
         indirectly  owned by  Guarantor,  or  Guarantor  and one or more  other
         Subsidiaries, or by one or more Subsidiaries.

                                      -2-


                  "Tenant"  shall mean and be a reference to each of IHS 135 and
         any  Related  Entity (as such term is  defined  in Section  17.1 of the
         Lease)  that is an  assignee  of IHS 135's  interest  in the Lease or a
         sublessee of any portion of the Leased Property from IHS 135.

2. Guaranty.  The Guarantor hereby unconditionally and irrevocably guarantees to
Landlord the prompt and complete  payment and  performance  by Tenant,  when due
(whether at stated maturity, by acceleration or otherwise),  of the Obligations.
The Guarantor further agrees to pay any and all reasonable expenses  (including,
without  limitation,  all  reasonable  fees  and  disbursements  of  counsel  to
Landlord)  which may be paid or incurred by  Landlord  in  enforcing  any of its
rights under this  Guaranty.  This  Guaranty is a guaranty of payment and not of
collectibility  and is absolute and in no way  conditional  or  contingent.  The
Guarantor's  liability hereunder is direct and unconditional and may be enforced
after nonpayment or nonperformance by Tenant of any Obligation without requiring
Landlord to resort to any other Person (including  without limitation Tenant) or
any other right, remedy or collateral.  This Guaranty shall remain in full force
and effect until the  Obligations  are paid in full following the termination of
all Lease Documents.

3. Costs and Expenses of Collection.  The Guarantor agrees, as principal obligor
and not as a  guarantor  only,  to pay to Landlord  forthwith  upon  demand,  in
immediately  available  funds,  all  reasonable  costs and expenses  (including,
without limitation, all court costs and all reasonable fees and disbursements of
counsel to  Landlord)  incurred or expended by Landlord in  connection  with the
enforcement  of this  Guaranty,  together with interest on such amounts from the
time such amounts  become due until  payment at the Overdue  Rate. It shall be a
condition of the  obligations of Guarantor to pay any fees and expenses  payable
by it under this  Guaranty  that  Landlord  shall have,  or shall have caused to
have,  provided Guarantor with a writing describing such fees and/or expenses in
reasonable detail.

4. Subrogation and Contribution.  Until the Obligations shall have been paid and
performed  in full  after  the  termination  of the Lease  Documents,  Guarantor
irrevocably  and  unconditionally  waives  any and all rights to which it may be
entitled,  by operation of law or otherwise,  to be subrogated,  with respect to
any payment  made by  Guarantor  hereunder,  to the rights of  Landlord  against
Tenant,  or otherwise to be  reimbursed,  indemnified or exonerated by Tenant in
respect thereof or to receive any payment,  in the nature of contribution or for
any other reason,  from any other guarantor of the  Obligations  with respect to
any payment made by Guarantor  hereunder.  Until the Obligations shall have been
paid and  performed  in full  after  the  termination  of the  Lease  Documents,
Guarantor  waives any defense it may have based upon any election of remedies by
Landlord which impairs  Guarantor's  subrogation rights or Guarantor's rights to
proceed against Tenant for reimbursement  (including without limitation any loss
of rights  Guarantor  may suffer by reason of any rights,  powers or remedies of
Tenant in connection with any  anti-deficiency  laws or any other laws limiting,
qualifying or discharging any  indebtedness to Landlord).  Until the Obligations
shall have been paid,  performed and satisfied in full after the  termination of
the Lease  Documents,  Guarantor  further waives any right to enforce any remedy
which  Landlord  now has or may in the future  have  against  Tenant,  any other
guarantor  or any other  Person and any benefit of, or any right to  participate
in, any security whatsoever now or in the future held by Landlord.

                                      -3-


5.  Effect of  Bankruptcy  Stay.  If  acceleration  of the time for  payment  or
performance of any of the Obligations is stayed upon the insolvency,  bankruptcy
or reorganization  of Tenant or any other Person or otherwise,  all such amounts
otherwise  subject to  acceleration  shall  nonetheless  be payable by Guarantor
under this Guaranty forthwith upon demand.

6. Receipt of Lease Documents, etc. Guarantor confirms,  represents and warrants
to Landlord that (i) it has received true and complete  copies of all the Lease,
and has read the contents  thereof and  reviewed the same with legal  counsel of
its choice;  (ii) no representations or agreements of any kind have been made to
Guarantor  which would  limit or qualify in any way the terms of this  Guaranty;
(iii)   Landlord   has  made  no   representation   to   Guarantor   as  to  the
creditworthiness  of IHS 135; and (iv) Guarantor has established  adequate means
of obtaining from Tenant on a continuing basis  information  regarding  Tenant's
financial condition.  The Guarantor agrees to keep adequately informed from such
means of any  facts,  events,  or  circumstances  which  might in any way affect
Guarantor's  risks  under this  Guaranty,  and  Guarantor  further  agrees  that
Landlord  shall have no obligation to disclose to Guarantor any  information  or
documents acquired by Landlord in the course of its relationship with Tenant.

7.  Amendments,  etc.  with  Respect  to the  Obligations.  The  obligations  of
Guarantor  under this  Guaranty  shall  remain in full force and effect  without
regard to, and shall not be released, altered,  exhausted,  discharged or in any
way affected by any circumstance or condition  (whether or not Tenant shall have
any knowledge or notice thereof), including without limitation (a) any amendment
or modification of or supplement to any Lease Document, or any obligation,  duty
or agreement of Tenant or any other Person thereunder or in respect thereof; (b)
any  assignment or transfer in whole or in part of any of the  Obligations;  any
furnishing,  acceptance,  release,  nonperfection or invalidity of any direct or
indirect  security  or  guaranty  for any of the  Obligations;  (c) any  waiver,
consent, extension, renewal, indulgence,  settlement, compromise or other action
or  inaction  under or in  respect of any Lease  Document,  or any  exercise  or
nonexercise of any right,  remedy, power or privilege under or in respect of any
such instrument (whether by operation of law or otherwise);  (d) any bankruptcy,
insolvency, reorganization,  arrangement, readjustment, composition, liquidation
or similar proceeding with respect to Tenant or any other Person or any of their
respective  properties or creditors or any resulting release or discharge of any
Obligation  (including without limitation any rejection of any lease pursuant to
Section 365 of the Federal Bankruptcy Code); (e) any new or additional financing
arrangements  entered  into by Tenant or by any other Person on behalf of or for
the benefit of Tenant;  (f) the merger or  consolidation  of Tenant with or into
any other Person or of any other Person with or into Tenant;  (g) the  voluntary
or involuntary sale or other  disposition of all or substantially all the assets
of Tenant or any other  Person;  (h) the voluntary or  involuntary  liquidation,
dissolution or termination of Tenant or any other Person; (i) any failure on the
part of Tenant or any other  Person  (other  than  Landlord)  for any  reason to
perform or comply with any term of any Lease Document or any other agreement; or
(j) any other  act,  omission  or  occurrence  whatsoever,  whether  similar  or
dissimilar to the foregoing.  The Guarantor  authorizes each Tenant,  each other
guarantor  in  respect  of the  Obligations  and  Landlord  at any  time  in its
discretion,  as the  case  may  be,  to  alter  any of the  terms  of any of the
Obligations.

8.  Guarantor as Principal.  If for any reason (other than  Landlord's  material
default, negligence or willful misconduct), Tenant, or any of them, or any other
Person is under no legal obligation to discharge any Obligation, or if any other
moneys included in the Obligations have


                                      -4-


become  unrecoverable  from  Tenant,  or any of them,  or any  other  Person  by
operation  of law or for  any  other  reason  (other  than  Landlord's  material
default, negligence or willful misconduct),  including,  without limitation, the
invalidity or irregularity in whole or in part of any Obligation or of any Lease
Document,  the legal  disability  of Tenant or any other  obligor  in respect of
Obligations,  any  discharge of or  limitation on the liability of Tenant or any
other  Person or any  limitation  on the  method or terms of  payment  under any
Obligation,  or of any Lease  Document,  which may now or hereafter be caused or
imposed in any manner whatsoever  (whether consensual or arising by operation of
law or  otherwise),  this Guaranty shall  nevertheless  remain in full force and
effect and shall be binding upon Guarantor to the same extent as if Guarantor at
all times had been the principal obligor on all Obligations.

9. Waiver of Demand, Notice, Etc. The Guarantor hereby waives, to the extent not
prohibited by applicable law, all presentments,  demands for performance, notice
of  nonperformance,  protests,  notices of  protests  and notices of dishonor in
connection with the Obligations or any Lease Document, including but not limited
to (a) notice of the  existence,  creation or incurring of any new or additional
obligation  or of any action or failure to act on the part of Tenant,  Landlord,
any  endorser or creditor of Tenant or any other  Person;  (b) any notice of any
indulgence,  extensions  or renewals  granted to any obligor with respect to the
Obligations;  (c) any  requirement of diligence or promptness in the enforcement
of rights  under any  Lease  Document,  or any  other  agreement  or  instrument
directly  or  indirectly  relating  thereto  or  to  the  Obligations;  (d)  any
enforcement of any present or future agreement or instrument  relating  directly
or indirectly  thereto or to the  Obligations;  (e) notice of any of the matters
referred to in  Paragraph 8 above;  (f) any defense of any kind which  Guarantor
may now have with respect to his liability  under this Guaranty  (other than the
defense  of  payment);  (g) any right to require  Landlord,  as a  condition  of
enforcement of this Guaranty,  to proceed  against Tenant or any other Person or
to proceed  against or exhaust any  security  held by Landlord at any time or to
pursue any other right or remedy in Landlord's power before  proceeding  against
Guarantor;  (h) any defense that may arise by reason of the incapacity,  lack of
authority,  death or disability of any other Person or Persons or the failure of
Landlord  to file or enforce a claim  against  the  estate  (in  administration,
bankruptcy,  or any other  proceeding)  of any other Person or Persons;  (i) any
defense based upon an election of remedies by Landlord;  (j) any defense arising
by reason of any "one  action" or  "anti-deficiency"  law or any other law which
may prevent Landlord from bringing any action, including a claim for deficiency,
against Guarantor,  before or after Landlord's commencement of completion of any
foreclosure action, either judicially or by exercise of a power of sale; (k) any
defense  based upon any lack of diligence by Landlord in the  collection  of any
Obligation;  (l) any duty on the part of Landlord to disclose to  Guarantor  any
facts  Landlord may now or hereafter  know about Tenant or any other  obligor in
respect of  Obligations;  (m) any defense arising because of an election made by
Landlord under Section  1111(b)(2) of the Federal  Bankruptcy  Code; and (n) any
defense based on any borrowing or grant of a security interest under Section 364
of the Federal Bankruptcy Code.  Guarantor  acknowledges and agrees that each of
the waivers set forth herein on the part of  Guarantor is made with  Guarantor's
full knowledge of the significance and consequences  thereof and that, under the
circumstances,  the waivers are reasonable.  If any such waiver is determined to
be contrary to applicable  law such waiver shall be effective only to the extent
not prohibited by such applicable law.

                                      -5-


10.  Reinstatement.  This  Guaranty  shall  continue  to  be  effective,  or  be
reinstated,  as the case may be, if at any time payment, or any part thereof, of
any of the Obligations is rescinded or must otherwise be restored or returned by
Landlord  upon  the   insolvency,   bankruptcy,   dissolution,   liquidation  or
reorganization  of  Tenant  or  upon  or as a  result  of the  appointment  of a
receiver,  intervenor  or  conservator  of, or trustee or similar  officer  for,
Tenant or any substantial part of its property, or otherwise, all as though such
payments had not been made.

11.  Payments.  The Guarantor hereby agrees that the Obligations will be paid to
Landlord  without  set-off  or  counterclaim  in U.S.  Dollars  at the office of
Landlord located at 400 Centre Street,  Newton,  Massachusetts 02458, or to such
other location as Landlord shall notify Guarantor.

12.  Covenants.  The Guarantor  hereby  covenants and agrees with Landlord that,
from and after the date of this Guaranty until the  Obligations are paid in full
and all Lease Documents have been terminated:

                  (a)  Notices.  The  Guarantor  shall  endeavor  to give prompt
notice to Landlord of any event which will,  or that may  reasonably be expected
to, result in a material adverse change in the financial  condition or operation
of  Guarantor  and its  Subsidiaries  taken as a whole,  provided,  however  the
Guarantor's  failure  to do so  shall  not  be  deemed  to be a  default  of the
Guarantor hereunder.

                  (b)  Financial  Statements.  The  Guarantor  shall furnish the
following statements to Landlord:

                           (i)  within  sixty  (60) days after each of the first
                  three quarters of any Fiscal Year, the Consolidated Financials
                  for such fiscal quarter; and

                           (ii) within one hundred  twenty  (120) days after the
                  end of each Fiscal Year, the Consolidated  Financials for such
                  Fiscal Year.

Landlord may at any time, and from time to time,  provide any lender to Landlord
with copies of any of the foregoing statements.

                  (c) Reports.  The Guarantor  shall cause the Tenant to provide
such  certificates,  reports and other  documents  required of it hereunder  and
under the Lease Documents.

                  (d) Legal  Existence.  The  Guarantor  shall do or cause to be
done all  things  necessary  to  preserve  and keep in full force and effect its
corporate existence (subject as provided in Paragraph 13(f) hereof).

                  (e) Merger; Sale of Assets, Etc. The Guarantor shall not enter
into any  transaction  of merger or  consolidation,  or  liquidate,  wind-up  or
dissolve itself (or suffer any  liquidation or  dissolution),  or convey,  sell,
lease,  sub-lease,  transfer or  otherwise  dispose of in one  transaction  or a
series of transactions,  all or substantially  all of its business,  property or
assets, whether now owned or hereafter acquired, except that Guarantor may merge
or consolidate with any Person, or convey,  transfer or lease  substantially all
of its assets so long as

                                      -6-


the successor formed by such  consolidation  or the survivor of such merger,  if
not the Guarantor, or the Person that acquires by conveyance,  transfer or lease
substantially  all of the assets of Guarantor,  as the case may be, shall assume
the obligations of the Guarantor  hereunder to the same extent and with the same
effect as though such  corporation  was a party hereto and was named and defined
as the "Guarantor" herein.

13.  Severability.  Any  provision  of this  Guaranty  which  is  prohibited  or
unenforceable in any jurisdiction shall, as to such jurisdiction, be ineffective
to the extent of such prohibition or unenforceability  without  invalidating the
remaining provisions hereof, and any such prohibition or unenforceability in any
jurisdiction shall not invalidate or render  unenforceable such provision in any
other jurisdiction.

14.  Additional  Guaranties.  This  Guaranty  shall be in  addition to any other
guaranty or other security for the  Obligations,  and it shall not be prejudiced
or  rendered  unenforceable  by the  invalidity  of any such other  guaranty  or
security.

15.  Paragraph  Headings.  The paragraph  headings used in this Guaranty are for
convenience of reference only and are not to affect the  construction  hereof or
be taken into consideration in the interpretation hereof.

16. No Waiver;  Cumulative Remedies,  Documentation of Expenses.  Landlord shall
not by any act (except by a written instrument pursuant to Paragraph 18 hereof),
delay, indulgence,  omission or otherwise, be deemed to have waived any right or
remedy hereunder or to have acquiesced in any Default or in any breach of any of
the terms and  conditions  hereof.  No  failure  to  exercise,  nor any delay in
exercising,  on the part of Landlord,  any right,  power or privilege  hereunder
shall operate as a waiver thereof.  No single or partial  exercise of any right,
power or  privilege  hereunder  shall  preclude  any other or  further  exercise
thereof or the  exercise of any other  right,  power or  privilege.  A waiver by
Landlord  of any  right or remedy  hereunder  on any one  occasion  shall not be
construed as a bar to any right or remedy which Landlord would otherwise have on
any future occasion. The rights and remedies herein provided are cumulative, may
be  exercised  singly or  concurrently  and are not  exclusive  of any rights or
remedies provided by law.

17.  Waivers  and  Amendments;  Successors  and  Assigns.  None of the  terms or
provisions of this Guaranty may be waived,  amended,  supplemented  or otherwise
modified  except by a written  instrument  executed by Guarantor  and  Landlord,
provided  that any  provision  of this  Guaranty  may be waived by Landlord in a
letter or  agreement  executed by Landlord or by telecopy  from  Landlord.  This
Guaranty shall be binding upon the successors and assigns of Guarantor and shall
inure to the benefit of Landlord and its successors and assigns.

18. WAIVER OF JURY TRIAL; CONSENT TO JURISDICTION;  GOVERNING LAW. THE GUARANTOR
HEREBY  EXPRESSLY  WAIVES ANY RIGHT IT MAY NOW OR HEREAFTER HAVE TO A JURY TRIAL
IN ANY  SUIT,  ACTION OR  PROCEEDING  WHICH  ARISES  OUT OF OR BY REASON OF THIS
GUARANTY,  ANY  LEASE  DOCUMENT  OR THE  TRANSACTIONS  CONTEMPLATED  HEREBY  AND
THEREBY.

                                      -7-


         BY ITS  EXECUTION  AND DELIVERY OF THIS  GUARANTY,  THE  GUARANTOR  (1)
ACCEPTS  FOR  ITSELF  AND IN  CONNECTION  WITH  ITS  PROPERTIES,  GENERALLY  AND
UNCONDITIONALLY,  THE NONEXCLUSIVE JURISDICTION OF ANY STATE OR FEDERAL COURT OF
COMPETENT  JURISDICTION  IN  THE  STATE  OF NEW  YORK  IN ANY  ACTION,  SUIT  OR
PROCEEDING  OF ANY KIND  AGAINST  IT WHICH  ARISES  OUT OF OR BY  REASON OF THIS
GUARANTY, ANY LEASE DOCUMENT OR THE TRANSACTIONS CONTEMPLATED HEREBY OR THEREBY,
IN ADDITION TO ANY OTHER COURT IN WHICH SUCH ACTION,  SUIT OR PROCEEDING  MAY BE
BROUGHT; (2) IRREVOCABLY AGREES TO BE BOUND BY ANY JUDGMENT RENDERED BY ANY SUCH
COURT IN ANY SUCH ACTION,  SUIT OR PROCEEDING IN WHICH IT SHALL HAVE BEEN SERVED
WITH PROCESS IN THE MANNER HEREINAFTER  PROVIDED;  AND (3) TO THE EXTENT THAT IT
MAY  LAWFULLY  DO SO,  WAIVES AND AGREES NOT TO ASSERT,  BY WAY OF MOTION,  AS A
DEFENSE OR OTHERWISE,  IN SUCH ACTION,  SUIT OR PROCEEDING  ANY CLAIM THAT IT IS
NOT PERSONALLY  SUBJECT TO THE JURISDICTION OF SUCH COURT,  THAT ITS PROPERTY IS
EXEMPT  OR  IMMUNE  FROM  ATTACHMENT  OR  EXECUTION,  THAT THE  ACTION,  SUIT OR
PROCEEDING  IS BROUGHT  IN AN  INCONVENIENT  FORUM OR THAT THE VENUE  THEREOF IS
IMPROPER.

         THIS GUARANTY SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE
LAWS OF THE STATE OF NEW YORK.

19. Notices.  All notices under this Guaranty shall be in writing,  and shall be
delivered by hand,  by a nationally  recognized  commercial  overnight  delivery
service,  by  first  class  mail  or  by  telecopy,   delivered,   addressed  or
transmitted, if to Landlord, at 400 Centre Street, Newton,  Massachusetts 02458,
Attention:  President  (telecopy  no.  617-796-8349),  with a copy to Sullivan &
Worcester LLP, One Post Office Square, Boston,  Massachusetts 02109,  Attention:
Alexander  A.  Notopoulos,  Jr.  Esq.  (telecopy  no.  617-338-2880),  and if to
Guarantor, at its address or telecopy number set out below its signature in this
Guaranty. Such notices shall be effective: in the case of hand deliveries,  when
received  and  acknowledged  in writing;  in the case of an  overnight  delivery
service,  on the next business day after being placed in the  possession of such
delivery  service,  with delivery  charges  prepaid;  in the case of mail,  five
business days after deposit in the postal system,  first class postage  prepaid;
and in the case of telecopy  notices,  the first business day following the date
when electronic  indication of receipt is received.  Either party may change its
address  and  telecopy  number  by  written  notice to the  other  delivered  in
accordance with the provisions of this Paragraph.


                                      -8-



                  IN WITNESS  WHEREOF,  the undersigned has caused this Guaranty
to be duly executed and delivered as of the date first above written.

                               INTEGRATED HEALTH SERVICES, INC.



                               By /s/ Daniel J. Booth
                                  Name:   Daniel J. Booth
                                  Title:  Senior Vice President

                               Address for Notices:

                                 Integrated Health Services, Inc.
                                 The Highlands
                                 910 Ridgebrook Road
                                 Sparks, MD 21152
                                 Telecopy no.:  (410) 773-1020
                                 Attn:  Daniel J. Booth, Senior Vice President,
                                 Finance

                                 with a copy to:

                                 Parker Chapin LLP
                                 405 Lexington Avenue
                                 New York, NY  10174
                                 Telecopy no.:  212-704-6288
                                 Attention:  Charles P. Greenman, Esq.


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