Exhibit 1.1

                      LIBERTY PROPERTY LIMITED PARTNERSHIP

                      (a Pennsylvania Limited Partnership)

                    $150,000,000 6.375% SENIOR NOTES DUE 2012

                             UNDERWRITING AGREEMENT

                                                                 August 19, 2002

Lehman Brothers Inc.,
Banc One Capital Markets, Inc.
Credit Suisse First Boston Corporation
Goldman, Sachs & Co.
J.P. Morgan Securities Inc.
Salomon Smith Barney Inc.
Wachovia Securities, Inc.


c/o Lehman Brothers Inc.
745 Seventh Avenue
New York, New York 10019

Dear Sirs:

Liberty Property Trust, a Maryland real estate investment trust (the "Company"),
and Liberty Property Limited Partnership, a Pennsylvania limited partnership
(the "Operating Partnership" and, together with the Company, the "Transaction
Entities"), each wishes to confirm as follows its agreement with Lehman Brothers
Inc., Banc One Capital Markets, Inc., Credit Suisse First Boston Corporation,
Goldman, Sachs & Co., J.P. Morgan Securities Inc., Salomon Smith Barney Inc. and
Wachovia Securities, Inc. (the "Underwriters," which term shall also include any
underwriter substituted as hereinafter provided in Section 9 of this Agreement),
with respect to the sale by the Operating Partnership and the purchase by the
Underwriters, acting severally and not jointly, of $150,000,000 aggregate
principal amount of its 6.375% Senior Notes due 2012 (the "Notes"), as further
described on Schedule II hereto.

                  Capitalized terms used but not otherwise defined herein shall
have the meanings given to those terms in the Prospectus (as herein defined).

                  1. Representations, Warranties and Agreements of the
Transaction Entities. Each of the Transaction Entities, jointly and severally,
represents, warrants and agrees that, as of the date hereof:

                           (a) A registration statement on Form S-3 (No.
                  333-39282)(the "Registration statement") and any amendments
                  thereto, with respect to one or

                  more series of debt securities of the Operating Partnership
                  has (i) been prepared by the Company and the Operating
                  Partnership in conformity with the requirements of the United
                  States Securities Act of 1933, as amended (the "Securities
                  Act") and the rules and regulations (the "Rules and
                  Regulations") of the United States Securities and Exchange
                  Commission (the "Commission") thereunder, (ii) been filed with
                  the Commission under the Securities Act and (iii) become
                  effective under the Securities Act; and the indenture, dated
                  as of October 24, 1997 as supplemented to the date hereof (the
                  "Indenture"), between the Operating Partnership and Bank One
                  Trust Company, N.A. (as successor to The First National Bank
                  of Chicago), as trustee (the "Trustee") has been qualified,
                  and the Sixth Supplemental Indenture, to be dated as of August
                  22, 2002, between the Operating Partnership and the Trustee
                  (the "Supplemental Indenture"), pursuant to which the Notes
                  shall be issued, will be qualified, under the Trust Indenture
                  Act of 1939 (the "Trust Indenture Act"). Copies of such
                  registration statement and any amendments thereto have been
                  delivered by the Company to you. As used in this Agreement,
                  "Effective Time" means, for the Registration Statement, the
                  date and the time as of which the Registration Statement, or
                  the most recent post-effective amendment thereto, if any, was
                  declared effective by the Commission; "Effective Date" means,
                  for the Registration Statement, the date of the Effective
                  Time; "Preliminary Prospectus" means any prospectus included
                  in the Registration Statement, or amendments thereto, before
                  it became effective under the Securities Act and any
                  prospectus filed with the Commission by the Company with the
                  consent of the Underwriters pursuant to Rule 424(a) of the
                  Rules and Regulations; "Registration Statement" means the
                  Registration Statement, as amended at the Effective Time,
                  including any documents incorporated by reference therein at
                  such time and all information contained in the final
                  prospectus filed with the Commission pursuant to Rule 424(b)
                  of the Rules and Regulations and deemed to be a part of such
                  registration statement as of the respective Effective Time
                  pursuant to paragraph (b) of Rule 430A of the Rules and
                  Regulations, and shall include any registration statement
                  filed pursuant to Rule 462(b) of the Rules and Regulations;
                  and "Prospectus" means such final prospectus, as first filed
                  with the Commission pursuant to paragraph (1) or (4) of Rule
                  424(b) of the Rules and Regulations. Any reference herein to
                  the Registration Statement, the Prospectus or a Preliminary
                  Prospectus shall be deemed to include the documents
                  incorporated or deemed to be incorporated by reference therein
                  which were filed under the Securities and Exchange Act of
                  1934, as amended (the "Exchange Act"). For purposes of this
                  Agreement, all references to the Registration Statement, any
                  Preliminary Prospectus or the Prospectus or any amendment or
                  supplement to any of the foregoing shall be deemed to include
                  the copy filed with the Commission pursuant to its Electronic
                  Data Gathering, Analysis and Retrieval system ("EDGAR").

                           (b) Each Preliminary Prospectus, if any, included as
                  part of the Registration Statement as originally filed or as
                  part of any amendment or supplement thereto, or filed pursuant
                  to Rule 424 under the Rules and Regulations, complied when so
                  filed in all material respects with the provisions of the
                  Securities Act and the rules and regulations thereunder, and
                  each Preliminary


                                       2

                  Prospectus, if any, delivered to the Underwriters for use in
                  connection with this offering was identical to the
                  electronically transmitted copies thereof filed with the
                  Commission pursuant to EDGAR, except to the extent permitted
                  by Regulation S-T.

                           (c) The Registration Statement conforms in all
                  material respects, and the Prospectus and any further
                  amendments or supplements to the Registration Statement or the
                  Prospectus will, when they become effective or are filed with
                  the Commission, as the case may be, conform in all material
                  respects to the requirements of the Securities Act, the Rules
                  and Regulations and the Trust Indenture Act and the rules and
                  regulations thereunder, and do not and will not, as of the
                  applicable Effective Date (as to the Registration Statement
                  and any amendment thereto) and as of the applicable filing
                  date and at the Delivery Date (as defined below) (as to the
                  Prospectus and any amendment or supplement thereto) 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 (with respect to
                  the Prospectus, in light of the circumstances under which they
                  were made); provided that no representation or warranty is
                  made as to information contained in or omitted from the
                  Registration Statement or the Prospectus in reliance upon and
                  in conformity with written information furnished to the
                  Company through the Underwriters by or on behalf of any
                  Underwriter specifically for inclusion therein. The Indenture
                  conforms, and the Supplemental Indenture will conform, in all
                  material respects to the requirements of the Trust Indenture
                  Act and the rules and regulations thereunder; provided,
                  however, that no representation or warranty is made as to
                  information contained in or omitted from that part of the
                  Registration Statement which shall constitute the Statement of
                  Eligibility and Qualification on Form T-1 under the Trust
                  Indenture Act of the Trustee under the Indenture. The
                  Prospectus delivered to the Underwriters for use in connection
                  with this offering was identical to the electronically
                  transmitted copies thereof filed with the Commission pursuant
                  to EDGAR, except to the extent permitted by Regulation S-T.

                           (d) The documents incorporated or deemed to be
                  incorporated by reference in the Registration Statement as of
                  the applicable Effective Date, the Prospectus as of its date
                  or any Preliminary Prospectus as of its date, complied in all
                  material respects with the Exchange Act and the rules and
                  regulations thereunder, and none of such documents, at such
                  dates, 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 the light of
                  the circumstances under which they were made, not misleading.

                           (e) No stop order suspending the effectiveness of the
                  Registration Statement or any part thereof has been issued and
                  no proceeding for that purpose has been instituted or, to the
                  knowledge of either of the Transaction Entities, threatened by
                  the Commission or by the state securities authority of any
                  jurisdiction. No order preventing or suspending the use of any
                  Preliminary Prospectus or the Prospectus has been issued and
                  no proceeding for that purpose


                                       3

                  has been instituted or, to the knowledge of either of the
                  Transaction Entities, after due inquiry of the Commission,
                  threatened by the Commission or by the state securities
                  authority of any jurisdiction.

                           (f) The Company has been duly formed and is validly
                  existing as a real estate investment trust in good standing
                  under the laws of the State of Maryland, is duly qualified to
                  do business and is in good standing in each jurisdiction in
                  which its ownership or lease of property or the conduct of its
                  business requires such qualification, and has all power and
                  authority necessary to own or hold its properties, to conduct
                  the business in which it is engaged and to enter into and
                  perform its obligations under this Agreement. None of the
                  subsidiaries of the Company (other than the Operating
                  Partnership) is a "significant subsidiary," as such term is
                  defined in Rule 405 of the Rules and Regulations. Except as
                  described in the Prospectus and other than the Property
                  Affiliates (as defined herein) and the Operating Partnership,
                  Development Corp. and SP Trust, the Company owns no direct or
                  indirect equity interest in any entity, except for such
                  interests as, in the aggregate, are not material to the
                  condition, financial or otherwise, or the earnings, assets,
                  business affairs or business prospects of the Company and its
                  subsidiaries considered as a single enterprise.

                           (g) All of the issued shares of beneficial interest
                  of the Company have been duly and validly authorized and
                  issued, are fully paid and non-assessable and conform to the
                  description thereof contained in the Prospectus. Except as
                  disclosed in the Prospectus and with respect to the Trust's
                  Amended and Restated Share Incentive Plan (the "Share
                  Incentive Plan"), the Company's Employee Stock Purchase Plan
                  and the Company's Dividend Reinvestment and Share Purchase
                  Plan, no shares of beneficial interest of the Company are
                  reserved for any purpose and except for the equity interests
                  in the Operating Partnership ("Units") and options to purchase
                  shares of beneficial interest issued pursuant to the Share
                  Incentive Plan, there are no outstanding securities
                  convertible into or exchangeable for any shares of beneficial
                  interest of the Company, and no outstanding options, rights
                  (preemptive or otherwise) or warrants to purchase or subscribe
                  for shares of beneficial interest or any other securities of
                  the Company.

                           (h) The Operating Partnership has been duly formed
                  and is validly existing as a limited partnership in good
                  standing under the laws of the Commonwealth of Pennsylvania,
                  is duly qualified to do business and is in good standing as a
                  foreign limited partnership in each jurisdiction in which its
                  ownership or lease of property or the conduct of its business
                  requires such qualification (each such jurisdiction as
                  provided in Schedule III), and has all partnership power and
                  authority necessary to own or hold its properties, to conduct
                  the business in which it is engaged and to enter into and
                  perform its obligations under this Agreement. The Company is
                  the sole general partner of the Operating Partnership. The
                  limited partnership agreement of the Operating Partnership, as
                  amended (the "Operating Partnership Agreement") is in full
                  force and effect, and the aggregate percentage interests of
                  the Company and the limited partners in the Operating
                  Partnership are as set forth in the Prospectus. The


                                       4

                  owner's equity of the Operating Partnership is as described in
                  the Prospectus. All of the Units have been duly and validly
                  authorized and issued, are fully paid and, to the extent that
                  such interests are owned by the Company, are owned by the
                  Company free and clear of all liens, encumbrances, equities or
                  claims.

                           (i) Liberty Property Development Corp. ("Development
                  Corp.") has been duly organized and is validly existing as a
                  corporation in good standing under the laws of the
                  Commonwealth of Pennsylvania, is duly qualified to do business
                  and is in good standing in each jurisdiction in which its
                  ownership or lease of property or the conduct of its business
                  requires such qualification, and has all corporate power and
                  authority necessary to own or hold its properties and to
                  conduct the business in which it is engaged. All of the issued
                  and outstanding capital stock of Development Corp. has been
                  duly authorized and validly issued and is fully paid and
                  non-assessable, has been offered and sold in compliance with
                  all applicable laws (including, without limitation, federal or
                  state securities laws) and all of the capital stock of
                  Development Corp. owned by the Operating Partnership, as
                  described in the Prospectus, is owned free and clear of any
                  security interest, mortgage, pledge, lien, encumbrance, claim,
                  restriction or equities. No shares of capital stock of
                  Development Corp. are reserved for any purpose, and there are
                  no outstanding securities convertible into or exchangeable for
                  any capital stock of Development Corp., and no outstanding
                  options, rights (preemptive or otherwise) or warrants to
                  purchase or to subscribe for shares of such capital stock or
                  any other securities of Development Corp.

                           (j) Liberty Property Development Corp-II
                  ("Development-II") has been duly organized and is validly
                  existing as a corporation in good standing under the laws of
                  the Commonwealth of Pennsylvania, is duly qualified to do
                  business and is in good standing in each jurisdiction in which
                  its ownership or lease of property or the conduct of its
                  business requires such qualification, and has all corporate
                  power and authority necessary to own or hold its properties
                  and to conduct the business in which it is engaged. All of the
                  issued and outstanding capital stock of Development-II has
                  been duly authorized and validly issued and is fully paid and
                  non-assessable, has been offered and sold in compliance with
                  all applicable laws (including, without limitation, federal or
                  state securities laws) and all of the capital stock of
                  Development-II owned by the Operating Partnership, as
                  described in the Prospectus, is owned free and clear of any
                  security interest, mortgage, pledge, lien, encumbrance, claim,
                  restriction or equities. No shares of capital stock of
                  Development-II are reserved for any purpose, and there are no
                  outstanding securities convertible into or exchangeable for
                  any capital stock of Development-II, and no outstanding
                  options, rights (preemptive or otherwise) or warrants to
                  purchase or to subscribe for shares of such capital stock or
                  any other securities of Development-II.

                           (k) Liberty Property Development Corp.-III
                  ("Development-III") has been duly organized and is validly
                  existing as a corporation in good standing under the laws of
                  the Commonwealth of Pennsylvania, is duly qualified to do
                  business and is in good standing in each jurisdiction in which
                  its ownership or


                                       5

                  lease of property or the conduct of its business requires such
                  qualification, and has all corporate power and authority
                  necessary to own or hold its properties and to conduct the
                  business in which it is engaged. All of the issued and
                  outstanding capital stock of Development-III has been duly
                  authorized and validly issued and is fully paid and
                  non-assessable, has been offered and sold in compliance with
                  all applicable laws (including, without limitation, federal or
                  state securities laws) and all of the capital stock of
                  Development-III owned by the Operating Partnership, as
                  described in the Prospectus, is owned free and clear of any
                  security interest, mortgage, pledge, lien, encumbrance, claim,
                  restriction or equities. No shares of capital stock of
                  Development-III are reserved for any purpose, and there are no
                  outstanding securities convertible into or exchangeable for
                  any capital stock of Development-III, and no outstanding
                  options, rights (preemptive or otherwise) or warrants to
                  purchase or to subscribe for shares of such capital stock or
                  any other securities of Development-III.

                           (l) Liberty Property Special Trust ("SP Trust") has
                  been duly organized and is validly existing as a business
                  trust in good standing under the laws of the Commonwealth of
                  Pennsylvania, is duly qualified to do business and is in good
                  standing as a foreign corporation in each jurisdiction in
                  which its ownership or lease of property or the conduct of its
                  business requires such qualification, and has all corporate
                  power and authority necessary to own or hold its properties
                  and to conduct the business in which it is engaged. All of the
                  issued and outstanding equity interests of SP Trust have been
                  duly authorized and validly issued and are fully paid and
                  non-assessable, has been offered and sold in compliance with
                  all applicable laws (including, without limitation, federal or
                  state securities laws) and all of the equity interests of SP
                  Trust are owned by the Company free and clear of any security
                  interest, mortgage, pledge, lien, encumbrance, claim,
                  restriction or equities. No shares of equity interests of SP
                  Trust are reserved for any purpose, and there are no
                  outstanding securities convertible into or exchangeable for
                  any equity interests of SP Trust and no outstanding options,
                  rights (preemptive or otherwise) or warrants to purchase or to
                  subscribe for shares of such equity interests or any other
                  securities of SP Trust

                           (m) Each of those certain partnerships, limited
                  liability companies or other entities holding title to one or
                  more of the Properties (the "Property Affiliates") are the
                  only entities other than the Operating Partnership, SP Trust,
                  Liberty Property Philadelphia Corp., a Pennsylvania
                  corporation and Liberty Property Philadelphia Trust, a
                  Pennsylvania trust, through which the Company and the
                  Operating Partnership own interests in the Properties. Each of
                  the Property Affiliates has been duly organized and is validly
                  existing as a limited partnership, limited liability company
                  or other entity, is duly qualified to do business and is in
                  good standing under the laws of the jurisdiction in which it
                  was organized, is duly qualified to do business and is in good
                  standing as a foreign entity in each jurisdiction in which its
                  ownership or lease of property or the conduct of its business
                  requires such qualification, and has all power and authority
                  necessary to own or hold its properties and to conduct the
                  business in which it is engaged. Except as set forth in the
                  Prospectus, all of the ownership


                                       6

                  interests of each Property Affiliate have been duly and
                  validly authorized and issued, are fully paid and
                  non-assessable and all of the ownership interests owned
                  directly or indirectly by the Company and the Operating
                  Partnership, as described in the Prospectus, are owned free
                  and clear of any security interest, mortgage, pledge, lien,
                  encumbrance, claim, restriction or equities.

                           (n) The Notes have been duly and validly authorized
                  and, when duly executed, authenticated, issued and delivered
                  against payment therefor as provided herein and in the
                  Indenture, will be duly and validly issued and outstanding,
                  and shall constitute valid and binding obligations on the part
                  of the Operating Partnership, entitled to the benefits of the
                  Indenture, and enforceable against the Operating Partnership
                  in accordance with their terms. Upon payment of the purchase
                  price and delivery of the Notes in accordance herewith, each
                  of the Underwriters will receive good, valid and marketable
                  title to the Notes, free and clear of all security interests,
                  mortgages, pledges, liens, encumbrances, claims, restrictions
                  and equities.

                           (o) The Indenture has been duly and validly
                  authorized, executed and delivered by the Operating
                  Partnership and, assuming due authorization, execution and
                  delivery by the Trustee, constitutes a valid and binding
                  agreement of the Operating Partnership, enforceable against
                  the Operating Partnership in accordance with its terms; the
                  Supplemental Indenture will be duly and validly authorized
                  and, when duly executed and delivered by the Operating
                  Partnership (assuming due execution and delivery by the
                  Trustee), will constitute a valid and binding agreement of the
                  Operating Partnership, enforceable against the Operating
                  Partnership in accordance with its terms; the Notes, the
                  Indenture and the Supplemental Indenture conform in all
                  material respects to the descriptions thereof contained in the
                  Prospectus.

                           (p) (A) This Agreement has been duly and validly
                  authorized, executed and delivered by each of the Transaction
                  Entities, and assuming due authorization, execution and
                  delivery by the Underwriters, is a valid and binding agreement
                  of each of the Transaction Entities, enforceable against the
                  Transaction Entities in accordance with its terms; and (B) the
                  Operating Partnership Agreement and the partnership agreement
                  of each Property Affiliate have been duly and validly
                  authorized, executed and delivered by the parties thereto and
                  are valid and binding agreements of the parties thereto,
                  enforceable against such parties in accordance with their
                  terms.

                           (q) The execution, delivery and performance of this
                  Agreement by each of the Transaction Entities, the execution,
                  delivery and performance of the Indenture by the Operating
                  Partnership and the consummation of the transactions
                  contemplated hereby and thereby 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 either of the Transaction Entities is a
                  party or by which either of the Transaction Entities is bound
                  or to which any of the Properties or other


                                       7

                  assets of either of the Transaction Entities is subject, nor
                  will such actions result in any violation of the provisions of
                  the charter, by-laws, certificate of limited partnership or
                  agreement of limited partnership of either of the Transaction
                  Entities, or any statute or any order, rule or regulation of
                  any court or governmental agency or body having jurisdiction
                  over either of the Transaction Entities or any of their
                  properties or assets; and except for the registration of the
                  Notes under the Securities Act and the qualification of the
                  Indenture under the Trust Indenture Act and such consents,
                  approvals, authorizations, registrations or qualifications as
                  may be required under the Exchange Act and applicable state
                  securities laws in connection with the purchase and
                  distribution of the Notes by the Underwriters, no consent,
                  approval, authorization or order of, or filing or registration
                  with, any such court or governmental agency or body is
                  required for the execution, delivery and performance of this
                  Agreement by the Transaction Entities or the Indenture by the
                  Operating Partnership, the consummation of the transactions
                  contemplated hereby and thereby, and the issuance and delivery
                  of the Notes.

                           (r) No event has occurred and is continuing that, had
                  the Notes been issued, would (whether or not with the giving
                  of notice and/or the passage of time and/or the fulfillment of
                  any other requirement) constitute an Event of Default (as
                  defined in the Indenture) under the Indenture.

                           (s) Other than as described in the Prospectus, as
                  disclosed to Lehman Brothers Inc. and other than rights of
                  certain persons who have contributed Properties to the
                  Partnership in exchange for Units and persons whose securities
                  are already registered under the Securities Act, and except
                  with respect to certain persons who may acquire preferred
                  shares of the Company in exchange for preferred units of
                  partnership interest in the Operating Partnership, there are
                  no contracts, agreements or understandings between the
                  Transaction Entities and any person granting such person the
                  right to require the Company to file a registration statement
                  under the Securities Act with respect to any securities of
                  either of the Transaction Entities owned or to be owned by
                  such person or to require either of the Transaction Entities
                  to include such securities in the securities registered
                  pursuant to the Registration Statement or in any securities
                  being registered pursuant to any other registration statement
                  filed by the Transaction Entities under the Securities Act.

                           (t) Except as described or contemplated in the
                  Prospectus or pursuant to the Share Incentive Plan, and except
                  for the issuance of common shares in exchange for Units,
                  neither Transaction Entity has sold or issued any securities
                  during the six-month period preceding the date of the
                  Prospectus, including any sales pursuant to Rule 144A or
                  Regulations D or S under, the Securities Act.

                           (u) Neither of the Transaction Entities nor any of
                  the Properties has sustained, since the date of the latest
                  audited financial statements included in the Prospectus, any
                  material loss or interference with its business from fire,
                  explosion, flood or other calamity, whether or not covered by
                  insurance, or from


                                       8

                  any labor dispute or court or governmental action, order or
                  decree, other than as set forth or contemplated in the
                  Prospectus; and, since such date, there has not been any
                  material change in the capital stock or long-term debt of
                  either of the Transaction Entities or any material adverse
                  change, or any development involving a prospective material
                  adverse change, in or affecting the Properties or the general
                  affairs, management, financial position, shareholders' equity
                  or results of operations of either of the Transaction
                  Entities, other than as set forth or contemplated in the
                  Prospectus.

                           (v) The financial statements (including the related
                  notes and supporting schedules thereto) filed as part of, or
                  incorporated by reference in, the Registration Statement and
                  the Prospectus present fairly the financial condition and
                  results of operations of the entities purported to be shown
                  thereby, at the dates and for the periods indicated, and have
                  been prepared in conformity with generally accepted accounting
                  principles applied on a consistent basis throughout the
                  periods involved. The Company's ratios of earnings to fixed
                  charges (actual and, if any, pro forma) included in the
                  Prospectus under the captions "Certain Ratios" and in Exhibit
                  12.1 to the Registration Statement have been calculated in
                  compliance with Item 503(d) of Regulation S-K of the
                  Commission. Pro forma financial information included in or
                  incorporated by reference in the Registration Statement and
                  the Prospectus has been prepared in accordance with the
                  applicable requirements of the Securities Act, the Rules and
                  Regulations and AICPA guidelines with respect to pro forma
                  financial information and includes all adjustments necessary
                  to present fairly the pro forma financial position of the
                  respective entity or entities presented therein at the
                  respective dates indicated and the results of operations for
                  the respective periods specified.

                           (w) Ernst & Young LLP, who have certified certain
                  financial statements of the Operating Partnership, whose
                  reports appear in the Prospectus or are incorporated by
                  reference therein and who have delivered the initial letter
                  referred to in Section 7(f) hereof, are independent public
                  accountants as required by the Securities Act and the Rules
                  and Regulations.

                           (x) (A) The Operating Partnership and the Property
                  Affiliates have good and marketable title to each of the
                  Properties, free and clear of all liens, encumbrances, claims,
                  security interests and defects, other than those referred to
                  in the Prospectus, those relating to certain intra-company
                  debt with respect to Development, Development-II and
                  Development III or those which are not material in amount or
                  those which would not have a material adverse effect on the
                  business, operations, use or value of any of the Properties;
                  (B) all liens, charges, encumbrances, claims or restrictions
                  on or affecting any of the Properties and the assets of any
                  Transaction Entity which are required to be disclosed in the
                  Prospectus are disclosed therein; (C) except as otherwise
                  described in the Prospectus, neither Transaction Entity and,
                  to the knowledge of the Transaction Entities, no tenant of any
                  of the Properties is in default under (i) any space leases (as
                  lessor or lessee, as the case may be) relating to the
                  Properties, or (ii) any of the mortgages or other security
                  documents or other agreements encumbering or


                                       9

                  otherwise recorded against the Properties, in each case which
                  default would have a material adverse effect on the applicable
                  Property, and neither Transaction Entity knows of any event
                  which, but for the passage of time or the giving of notice, or
                  both, would constitute such a default under any of such
                  documents or agreements; (D) each of the Properties complies
                  with all applicable codes, laws and regulations (including,
                  without limitation, building and zoning codes, laws and
                  regulations and laws relating to access to the Properties),
                  except for such failures to comply that would not have a
                  material adverse effect on the business operations, use or
                  value of such Property; and (E) neither Transaction Entity has
                  knowledge of any pending or threatened condemnation
                  proceedings, zoning change or other proceeding or action that
                  will in any material manner adversely affect the size of, use
                  of, improvements on, construction on or access to the
                  Properties.

                           (y) The mortgages and deeds of trust which encumber
                  the Properties are not convertible into equity securities of
                  the entity owning such Property and said mortgages and deeds
                  of trust are not cross-defaulted or cross-collateralized with
                  any property other than other Properties.

                           (z) The Operating Partnership and the Property
                  Affiliates have obtained title insurance on the fee or
                  leasehold interests in each of the Properties, in an amount at
                  least equal to the greater of (A) the mortgage indebtedness of
                  each such Property or (B) the purchase price (exclusive of
                  improvements) of each such Property.

                           (aa) Except as disclosed in the Prospectus and except
                  such as in each case would not have a material adverse effect
                  on any Property, Property Affiliate, or Transaction Entity or
                  any of their subsidiaries, taken together as a whole; (A) to
                  the knowledge of the Transaction Entities, after due inquiry,
                  (i) the operations of the Company, the Operating Partnership,
                  Development Corp., Development II, Development III and SP
                  Trust, and (ii) the Properties are in compliance with all
                  Environmental Laws (as defined below) and all requirements of
                  applicable permits, licenses, approvals and other
                  authorizations issued pursuant to Environmental Laws; (B) to
                  the knowledge of the Transaction Entities, after due inquiry,
                  none of the Transaction Entities, the Property Affiliates or
                  any Property has caused or suffered to occur any Release (as
                  defined below) of any Hazardous Substance (as defined below)
                  into the Environment (as defined below) on, in, under or from
                  any Property, and no condition exists on, in, under or
                  adjacent to any Property that could result in the incurrence
                  of liabilities under, or any violations of, any Environmental
                  Law or give rise to the imposition of any Lien (as defined
                  below), under any Environmental Law; (C) none of the
                  Transaction Entities or Property Affiliates has received any
                  written notice of a claim under or pursuant to any
                  Environmental Law or under common law pertaining to Hazardous
                  Substances on, in, under or originating from any Property; (D)
                  neither of the Transaction Entities has actual knowledge of,
                  or received any written notice from any Governmental Authority
                  (as defined below) claiming, any violation of any
                  Environmental Law or a determination to


                                       10

                  undertake and/or request the investigation, remediation,
                  clean-up or removal of any Hazardous Substance released into
                  the Environment on, in, under or from any Property; and (E) no
                  Property is included or, to the knowledge of the Transaction
                  Entities, after due inquiry, proposed for inclusion on the
                  National Priorities List issued pursuant to CERCLA (as defined
                  below) by the United States Environmental Protection Agency
                  (the "EPA") or on the Comprehensive Environmental Response,
                  Compensation, and Liability Information System database
                  maintained by the EPA, and neither of the Transaction Entities
                  has actual knowledge that any Property has otherwise been
                  identified in a published writing by the EPA as a potential
                  CERCLA removal, remedial or response site or, to the knowledge
                  of the Transaction Entities, is included on any similar list
                  of potentially contaminated sites pursuant to any other
                  Environmental Law.

                  As used herein, "Hazardous Substance" shall include any
                  hazardous substance, hazardous waste, toxic substance,
                  pollutant or hazardous material, including, without
                  limitation, oil, petroleum or any petroleum-derived substance
                  or waste, asbestos or asbestos-containing materials, PCBs,
                  pesticides, explosives, radioactive materials, dioxins, urea
                  formaldehyde insulation or any constituent of any such
                  substance, pollutant or waste which is subject to regulation
                  under any Environmental Law (including, without limitation,
                  materials listed in the United States Department of
                  Transportation Optional Hazardous Material Table, 49 C.F.R.
                  Section 172.101, or in the EPA's List of Hazardous Substances
                  and Reportable Quantities, 40 C.F.R. Part 302); "Environment"
                  shall mean any surface water, drinking water, ground water,
                  land surface, subsurface strata, river sediment, buildings,
                  structures, and ambient, workplace and indoor and outdoor air;
                  "Environmental Law" shall mean the Comprehensive Environmental
                  Response, Compensation and Liability Act of 1980, as amended
                  (42 U.S.C. Section 9601 et seq.) ("CERCLA"), the Resource
                  Conservation and Recovery Act of 1976, as amended (42 U.S.C.
                  Section 6901, et seq.), the Clean Air Act, as amended (42
                  U.S.C. Section 7401, et seq.), the Clean Water Act, as amended
                  (33 U.S.C. Section 1251, et seq.), the Toxic Substances
                  Control Act, as amended (15 U.S.C. Section 2601, et seq.), the
                  Occupational Safety and Health Act of 1970, as amended (29
                  U.S.C. Section 651, et seq.), the Hazardous Materials
                  Transportation Act, as amended (49 U.S.C. Section 1801, et
                  seq.), and all other federal, state and local laws,
                  ordinances, regulations, rules and orders relating to the
                  protection of the Environment or of human health from
                  environmental effects; "Governmental Authority" shall mean any
                  federal, state or local governmental office, agency or
                  authority having the duty or authority to promulgate,
                  implement or enforce any Environmental Law; "Lien" shall mean,
                  with respect to any Property, any lien, encumbrance, penalty,
                  fine, charge, assessment, judgment or other liability in, on
                  or affecting such Property; and "Release" shall mean any
                  spilling, leaking, pumping, pouring, emitting, emptying,
                  discharging, injecting, escaping, leaching, dumping, emanating
                  or disposing of any Hazardous Substance into the Environment,
                  including, without limitation, the abandonment or discard of
                  barrels, containers, tanks (including, without limitation,
                  underground storage tanks) or other receptacles containing or
                  previously containing any Hazardous Substance.


                                       11

                           (bb) Each Transaction Entity and each of their
                  subsidiaries carries, or is covered by, insurance in such
                  amounts and covering such risks as is adequate for the conduct
                  of its business and as is customary for companies engaged in
                  similar businesses in similar industries; and each Property
                  carries, or is covered by, insurance covering the value of
                  such Property.

                           (cc) Each Transaction Entity owns or possesses
                  adequate rights to use all material patents, patent
                  applications, trademarks, service marks, trade names,
                  trademark registrations, service mark registrations,
                  copyrights and licenses necessary for the conduct of its
                  business and has no reason to believe that the conduct of its
                  business will conflict with, and has not received any notice
                  of any claim of conflict with, any such rights of others.

                           (dd) Except as described in the Prospectus, there are
                  no legal or governmental proceedings pending to which either
                  Transaction Entity or their subsidiaries is a party or of
                  which any property or assets of either Transaction Entity or
                  their subsidiaries is the subject which, if determined
                  adversely to such Transaction Entity or subsidiary, could
                  reasonably be expected to have a material adverse effect on
                  the consolidated financial position, shareholders' equity,
                  results of operations, business or prospects of the Company;
                  and to the knowledge of the Transaction Entities, no such
                  proceedings are threatened or contemplated by governmental
                  authorities or threatened by others.

                           (ee) There are no contracts or other documents which
                  are required to be described in the Prospectus or filed as
                  exhibits to the Registration Statement by the Securities Act
                  or by the Rules and Regulations which have not been described
                  in the Prospectus or filed as exhibits to the Registration
                  Statement or incorporated therein by reference as permitted by
                  the Rules and Regulations.

                           (ff) No relationship, direct or indirect, exists
                  between or among either of the Transaction Entities on the one
                  hand, and the trustees, officers, shareholders, customers or
                  suppliers of the Transaction Entities on the other hand, that
                  is required to be described in the Prospectus that is not so
                  described.

                           (gg) No labor disturbance by the employees of either
                  Transaction Entity exists or, to the knowledge of the
                  Transaction Entities, is imminent which might be expected to
                  have a material adverse effect on the consolidated financial
                  position, shareholders' equity, results of operations,
                  business or prospects of such Transaction Entity.

                           (hh) Each "pension plan" for which either Transaction
                  Entity would have any liability that is intended to be
                  qualified under section 401(a) of the Code is (i) so qualified
                  in all material respects and nothing has occurred, whether by
                  action or by failure to act, which would cause the loss of
                  such qualification and (ii) in compliance in all material
                  respects with all presently applicable provisions of the
                  Employee Retirement Income Security Act of 1974, as amended,
                  including the regulations and published interpretations
                  thereunder ("ERISA"); to the


                                       12

                  knowledge of the Transaction Entities, after due inquiry, no
                  "reportable event" (as defined in ERISA) has occurred with
                  respect to any "pension plan" (as defined in ERISA) for which
                  either Transaction Entity would have any liability; neither
                  Transaction Entity has incurred or expects to incur liability
                  under (i) Title IV of ERISA with respect to termination of, or
                  withdrawal from, any "pension plan" or (ii) sections 412 or
                  4971 of the Internal Revenue Code of 1986, as amended,
                  including the regulations and published interpretations
                  thereunder (the "Code"); and.

                           (ii) Each Transaction Entity and their subsidiaries
                  has filed all federal, state and local income and franchise
                  tax returns required to be filed through the date hereof and
                  has paid all taxes due thereon, and no material tax deficiency
                  has been determined adversely to either Transaction Entity or
                  their subsidiaries which has had (nor does either Transaction
                  Entity have any knowledge of any tax deficiency which, if
                  determined adversely to it might have) a material adverse
                  effect on the financial position, shareholders' equity,
                  results of operations, business or prospects of such
                  Transaction Entity or subsidiary.

                           (jj) At all times since June 16, 1994, the Company,
                  the Operating Partnership, Development Corp., Development II,
                  Development III and SP Trust have been, and upon the sale of
                  the Notes will continue to be, organized and operated in
                  conformity with the requirements for qualification and
                  taxation of the Company as a real estate investment trust
                  under the Code and the proposed method of operation of the
                  Company, the Operating Partnership, Development Corp.,
                  Development II, Development III and SP Trust will enable the
                  Company to continue to meet the requirements for qualification
                  and taxation as a real estate investment trust under the Code.

                           (kk) Since the date as of which information is given
                  in the Prospectus through the date hereof, and except as may
                  otherwise be disclosed or contemplated in the Prospectus,
                  neither Transaction Entity has (i) issued or granted any
                  securities, (ii) incurred any liability or obligation, direct
                  or contingent, other than liabilities and obligations which
                  were incurred in the ordinary course of business, (iii)
                  entered into any transaction not in the ordinary course of
                  business nor (iv) declared or paid any dividend on its capital
                  stock (other than regular quarterly dividends).

                           (ll) Each Transaction Entity and each of their
                  subsidiaries (i) makes and keeps accurate books and records
                  and (ii) maintains internal accounting controls which provide
                  reasonable assurance that (A) transactions are executed in
                  accordance with management's authorization, (B) transactions
                  are recorded as necessary to permit preparation of its
                  financial statements and to maintain accountability for its
                  assets, (C) access to its assets is permitted only in
                  accordance with management's authorization and (D) the
                  reported accountability for its assets is compared with
                  existing assets at reasonable intervals.


                                       13

                           (mm) No Transaction Entity or any of their
                  subsidiaries (i) is in violation of its charter, by-laws,
                  certificate of limited partnership, agreement of limited
                  partnership or other similar organizational document, (ii) is
                  in default in any material respect, and no event has occurred
                  which, with notice or lapse of time or both, would constitute
                  such a default, in the due performance or observance of any
                  term, covenant or condition contained in any material
                  indenture, mortgage, deed of trust, loan agreement or other
                  agreement or instrument to which it is a party or by which it
                  is bound or to which any of the Properties or any of its other
                  properties or assets is subject or (iii) is in violation in
                  any material respect of any law, ordinance, governmental rule,
                  regulation or court decree to which it or the Properties or
                  any of its other properties or assets may be subject or has
                  failed to obtain any material license, permit, certificate,
                  franchise or other governmental authorization or permit
                  necessary to the ownership of the Properties or any of its
                  other properties or assets or to the conduct of its business.

                           (nn) Neither Transaction Entity, nor any trustee,
                  officer, agent, employee or other person associated with or
                  acting on behalf of either Transaction Entity, has used any
                  corporate funds for any unlawful contribution, gift,
                  entertainment or other unlawful expense relating to political
                  activity; made any direct or indirect unlawful payment to any
                  foreign or domestic government official or employee from
                  corporate funds; violated or is in violation of any provision
                  of the Foreign Corrupt Practices Act of 1977; or made any
                  bribe, rebate, payoff, influence payment, kickback or other
                  unlawful payment.

                           (oo) Neither Transaction Entity nor any of their
                  subsidiaries is an "investment company" within the meaning of
                  such term under the Investment Company Act of 1940 and the
                  rules and regulations of the Commission thereunder.

                           (pp) Other than this Agreement and as set forth in
                  the Prospectus under the heading "Underwriting," there are no
                  contracts, agreements or understandings between either
                  Transaction Entity and any person that would give rise to a
                  valid claim against either Transaction Entity or any
                  Underwriter for a brokerage commission, finder's fee or other
                  like payment with respect to the consummation of the
                  transactions contemplated by this Agreement.

                           (qq) Each Transaction Entity has complied with all
                  applicable provisions of Florida Statutes Section 517.075,
                  relating to issuers doing business with Cuba.

                  2. Purchase of the Notes by the Underwriters. On the basis of
the representations and warranties contained in, and subject to the terms and
conditions of, this Agreement, the Operating Partnership agrees to sell to the
several Underwriters, and each of the Underwriters, severally and not jointly,
agrees to purchase from the Operating Partnership, the respective principal
amount of Notes set forth opposite that Underwriter's name in Schedule I hereto
at the purchase price set forth in Schedule II hereto plus accrued interest, if
any, from the date specified in Schedule II hereto to the date of payment and
delivery.


                                       14

                  3. Offering of Notes by the Underwriters. The several
Underwriters propose to offer the Notes for sale upon the terms and conditions
set forth in the Prospectus.

                  4. Delivery of and Payment for the Notes. Delivery of and
payment for the Notes shall be made at the office of Clifford Chance Rogers &
Wells LLP, 200 Park Avenue, New York, New York 10166, at 10:00 A.M., New York
City time, on the third full business day following the date of this Agreement
or on the fourth full business day if this Agreement is executed after the daily
closing time of the New York Stock Exchange (unless postponed in accordance with
the provisions of Section 9 hereof), or at such other date or place as shall be
determined by agreement between the Underwriters and the Operating Partnership.
This date and time are sometimes referred to as the "Delivery Date." On the
Delivery Date, the Operating Partnership shall deliver or cause to be delivered
the Notes to the Underwriters for the account of each Underwriter against
payment to or upon the order of the Operating Partnership of the purchase price
by certified or official bank check or checks payable in same day funds or, at
the discretion of the Operating Partnership, by wire transfer in same day funds.
Time shall be of the essence, and delivery at the time and place specified
pursuant to this Agreement is a further condition of the obligation of each
Underwriter hereunder. Upon delivery, the Notes shall be registered in such
names and in such denominations as the Underwriters shall request in writing not
less than two full business days prior to the Delivery Date. For the purpose of
expediting the checking and packaging of the Notes, the Operating Partnership
shall make the Notes available for inspection by the Underwriters in New York,
New York, not later than 2:00 P.M., New York City time, on the business day
prior to the Delivery Date.

                  5. Further Agreements of the Transaction Entities. Each of the
Transaction Entities jointly and severally agrees:

                           (a) To prepare the Prospectus in a form approved by
                  the Underwriters and to file such Prospectus pursuant to Rule
                  424(b) under the Securities Act not later than the
                  Commission's close of business on the second business day
                  following the execution and delivery of this Agreement or, if
                  applicable, such earlier time as may be required by Rule
                  430A(a)(3) under the Securities Act; to make no further
                  amendment or any supplement to the Registration Statement or
                  to the Prospectus except in accordance with Section 5(e)
                  hereof and except for the Form 8-K; to advise the
                  Underwriters, promptly after it receives notice thereof, of
                  the time when any amendment to the Registration Statement has
                  been filed or becomes effective or any supplement to the
                  Prospectus or any amended Prospectus has been filed and to
                  furnish the Underwriters with copies thereof; to advise the
                  Underwriters, promptly after it receives notice thereof, of
                  the issuance by the Commission of any stop order or of any
                  order preventing or suspending the use of any Preliminary
                  Prospectus or the Prospectus, of the suspension of the
                  qualification of the Notes for offering or sale in any
                  jurisdiction, of the initiation or threatening of any
                  proceeding for any such purpose, or of any request by the
                  Commission for the amending or supplementing of the
                  Registration Statement or the Prospectus or for additional
                  information; and, in the event of the issuance of any stop
                  order or of any order preventing or suspending the use of any
                  Preliminary Prospectus or the Prospectus or suspending any
                  such qualification, to use promptly its best efforts to obtain
                  its withdrawal;


                                       15

                           (b) To furnish promptly to the Underwriters and to
                  counsel for the Underwriters such number of conformed copies
                  as the Underwriters shall reasonably request of the
                  Registration Statement as originally filed with the
                  Commission, and each amendment thereto filed with the
                  Commission, including all consents and exhibits filed
                  therewith or incorporated by reference therein and all
                  documents incorporated by reference therein;

                           (c) To deliver promptly to the Underwriters such
                  number of the following documents as the Underwriters shall
                  reasonably request: (i) conformed copies of the Registration
                  Statement as originally filed with the Commission and each
                  amendment thereto (in each case excluding exhibits other than
                  this Agreement) and (ii) each Preliminary Prospectus, the
                  Prospectus and any amended or supplemented Prospectus; and, if
                  the delivery of a prospectus is required at any time after the
                  applicable Effective Time in connection with the offering or
                  sale of the Notes or any other securities relating thereto and
                  if at such time any events shall have occurred as a result of
                  which the Prospectus as then amended or supplemented would
                  include an untrue statement of a material fact or omit to
                  state any material fact necessary in order to make the
                  statements therein, in the light of the circumstances under
                  which they were made when such Prospectus is delivered, not
                  misleading, or, if for any other reason it shall be necessary
                  to amend or supplement the Prospectus in order to comply with
                  the Securities Act or the Exchange Act, to notify the
                  Underwriters and, upon their request, to file such document
                  and to prepare and furnish without charge to each Underwriter
                  and to any dealer in securities as many copies as the
                  Underwriters may from time to time reasonably request of an
                  amended or supplemented Prospectus which will correct such
                  statement or omission or effect such compliance. The
                  aforementioned documents furnished to the Underwriters will be
                  identical to the electronically transmitted copies thereof
                  filed with the Commission pursuant to EDGAR, except to the
                  extent permitted by Regulation S-T.

                           (d) To file promptly with the Commission any
                  amendment to the Registration Statement or the Prospectus or
                  any supplement to the Prospectus that may, in the judgment of
                  the Company or counsel for the Underwriters, be required by
                  the Securities Act or requested by the Commission;

                           (e) Prior to filing with the Commission any amendment
                  to the Registration Statement or supplement to the Prospectus
                  or any Prospectus pursuant to Rule 424 of the Rules and
                  Regulations, to furnish a copy thereof to the Underwriters and
                  counsel for the Underwriters within a reasonable period of
                  time prior to the filing thereof, and that filing thereof
                  shall not occur if the Underwriters shall have objected in
                  good faith thereto;

                           (f) The Operating Partnership will make generally
                  available to its security holders as soon as practicable but
                  no later than 60 days after the close of the period covered
                  thereby an earnings statement (in form complying with the
                  provisions of Section 11(a) of the Securities Act and Rule 158
                  of the Rules and


                                       16

                  Regulations), which need not be certified by independent
                  certified public accountants unless required by the Securities
                  Act or the Rules and Regulations, covering a twelve-month
                  period commencing after the "effective date" (as defined in
                  said Rule 158) of the Registration Statement;

                           (g) For a period of five years following the
                  applicable Effective Date, to furnish to the Underwriters
                  copies of all materials furnished by the Operating Partnership
                  to its shareholders and all public reports and all reports and
                  financial statements furnished by the Operating Partnership to
                  the Commission pursuant to the Exchange Act or any rule or
                  regulation of the Commission thereunder;

                           (h) Promptly from time to time to take such action as
                  the Underwriters may reasonably request to qualify the Notes
                  for offering and sale under the securities, real estate
                  syndication or Blue Sky laws of such jurisdictions as the
                  Underwriters may request and to comply with such laws so as to
                  permit the continuance of sales and dealings therein in such
                  jurisdictions for as long as may be necessary to complete the
                  distribution of the Notes, except that the Operating
                  Partnership shall not be required in connection therewith to
                  qualify as a foreign corporation or to execute a consent to
                  service of process in any jurisdiction;

                           (i) Until the Delivery Date, neither the Operating
                  Partnership nor the Company will, directly or indirectly,
                  offer for sale, contract to sell, sell or otherwise dispose
                  of, or register for sale under the Securities Act, any debt
                  securities, or sell or grant options, rights or warrants with
                  respect to any debt securities, without the prior written
                  consent of Lehman Brothers Inc.;

                           (j) To apply the net proceeds from the sale of the
                  Notes in accordance with the description set forth in the
                  Prospectus under the caption "Use of Proceeds";

                           (k) To take such steps as shall be necessary to
                  ensure that none of the Company, the Operating Partnership or
                  any of their subsidiaries shall become an "investment company"
                  within the meaning of such term under the Investment Company
                  Act of 1940 and the rules and regulations of the Commission
                  thereunder;

                           (l) Except as stated in this Agreement and in the
                  Preliminary Prospectus, if any, and Prospectus, neither
                  Transaction Entity has taken, nor will take, directly or
                  indirectly, any action designed to or that might reasonably be
                  expected to cause or result in stabilization or manipulation
                  of the price of the Notes to facilitate the sale or resale of
                  the Notes;

                           (m) The Company will use its best efforts to continue
                  to meet the requirements to qualify as a "real estate
                  investment trust" under the Code; and

                           (n) If this Agreement shall be terminated by the
                  Underwriters because of any failure or refusal on the part of
                  the Transaction Entities to comply with the terms or fulfill
                  any of the conditions of this Agreement, the Transaction
                  Entities


                                       17

                  jointly and severally agree to reimburse the Underwriters for
                  all reasonable out-of-pocket expenses (including fees and
                  expenses of counsel for the Underwriters) incurred by the
                  Underwriters in connection herewith.

                  6. Expenses. The Transaction Entities jointly and severally
agree to pay (a) the costs incident to the authorization, issuance, sale and
delivery of the Notes and any taxes payable in connection therewith; (b) the
costs incident to the preparation, printing and filing under the Securities Act
of the Registration Statement and any amendments and exhibits thereto; (c) the
costs of distributing the Registration Statement as originally filed and each
amendment thereto and any post-effective amendments thereof (including, in each
case, exhibits), any Preliminary Prospectus, the Prospectus and any amendment or
supplement to the Prospectus, all as provided in this Agreement; (d) the costs
of producing and distributing this Agreement and any other related documents in
connection with the offering, purchase, sale and delivery of the Notes; (e) the
filing fees incident to securing any required review by the National Association
of Securities Dealers, Inc. of the terms of sale of the Notes; (f) any
applicable listing or other fees; (g) the fees and expenses of qualifying the
Notes under the securities laws of the several jurisdictions as provided in
Section 5(h) and of preparing, printing and distributing a Blue Sky Memorandum
(including related fees and expenses of counsel to the Underwriters); (h) the
fees paid to rating agencies in connection with the rating of the Notes; and (i)
all other costs and expenses incident to the performance of the obligations of
the Transaction Entities under this Agreement; provided that, except as provided
in this Section 6 and in Section 12, the Underwriters shall pay their own costs
and expenses, including the costs and expenses of their counsel, any transfer
taxes on the Notes which they may sell and the expenses of advertising any
offering of the Notes made by the Underwriters.

                  7. Conditions of Underwriters' Obligations. The respective
obligations of the Underwriters hereunder are subject to the accuracy, when made
and on the Delivery Date, of the representations and warranties of the
Transaction Entities contained herein, to the performance by each Transaction
Entity of its obligations hereunder, and to each of the following additional
terms and conditions:

                           (a) If, at the time this Agreement is executed and
                  delivered, it is necessary for the Registration Statement or a
                  post-effective amendment thereto to be declared effective
                  before the offering of the Notes may commence, the
                  Registration Statement or such post-effective amendment shall
                  have become effective not later than 5:30 P.M., New York City
                  time, on the date hereof, or at such later date and time as
                  shall be consented to in writing by you, and all filings, if
                  any, required to have been made by such time by Rules 424 and
                  430A under the Rules and Regulations shall have been timely
                  made; no stop order suspending the effectiveness of the
                  Registration Statement shall have been issued and no
                  proceeding for that purpose shall have been instituted or, to
                  the knowledge of the Transaction Entities or any Underwriter,
                  threatened by the Commission, and any request of the
                  Commission for additional information (to be included in the
                  Registration Statement or the Prospectus or otherwise) shall
                  have been complied with to the satisfaction of the
                  Underwriters.


                                       18

                           (b) Subsequent to the effective date of this
                  Agreement, there shall not have occurred (i) any change, or
                  any development involving a prospective change, in or
                  affecting the condition, financial or otherwise, business,
                  properties, net worth, or results of operations of either
                  Transaction Entity or any of their subsidiaries or any
                  Property not contemplated by the Prospectus, which in the
                  reasonable opinion of the Underwriters, would materially
                  adversely affect the market for the Notes, or (ii) any event
                  or development relating to or involving either Transaction
                  Entity, or any partner, officer, director or trustee of either
                  Transaction Entity, which makes any statement of a material
                  fact made in the Prospectus untrue or which, in the reasonable
                  opinion of the Company and its counsel or the Underwriters and
                  their counsel, requires the making of any addition to or
                  change in the Prospectus in order to state a material fact
                  required by the Securities Act or any other law to be stated
                  therein or necessary in order to make the statements therein
                  not misleading, if amending or supplementing the Prospectus to
                  reflect such event or development would, in the reasonable
                  opinion of the Underwriters or their counsel, materially
                  adversely affect the market for the Notes.

                           (c) All corporate and partnership proceedings and
                  other legal matters incident to the authorization, form and
                  validity of this Agreement, the Indenture, the Notes, the
                  Registration Statement and the Prospectus, and all other legal
                  matters relating to this Agreement, the Indenture, the Notes,
                  the Registration Statement and the Prospectus and the
                  transactions contemplated hereby and thereby shall be
                  reasonably satisfactory in all material respects to counsel
                  for the Underwriters, and the Transaction Entities shall have
                  furnished to such counsel all documents and information that
                  they may reasonably request to enable them to pass upon such
                  matters.

                           (d) (A) Morgan Lewis & Bockius LLP shall have
                  furnished to the Underwriters its written opinion, as counsel
                  to the Transaction Entities, addressed to the Underwriters and
                  dated the Delivery Date, in form and substance reasonably
                  satisfactory to the Underwriters, to the effect that:

                                    (i) The Company is in good standing as a
                           foreign trust or corporation in those jurisdictions
                           listed in such opinion.

                                    (ii) The Operating Partnership is validly
                           existing as a limited partnership under the laws of
                           the Commonwealth of Pennsylvania, is duly qualified
                           to do business as a foreign limited partnership in
                           Florida, Kansas, Maryland, Michigan, Minnesota, New
                           Jersey, North Carolina, South Carolina, Texas,
                           Virginia and Wisconsin, and has all partnership power
                           and authority necessary to own or hold its
                           properties, to conduct the business in which it is
                           engaged as described in the Registration Statement
                           and the Prospectus, and to enter into and perform its
                           obligations under this Agreement. The Company is the
                           sole general partner of the Operating Partnership.
                           The Operating Partnership Agreement is in full force
                           and effect, and the aggregate percentage interests of
                           the Company and the


                                       19

                           limited partners in the Operating Partnership are as
                           set forth in the Prospectus. All of the partnership
                           interests of the Operating Partnership have been duly
                           and validly authorized and issued, are fully paid
                           and, to the extent that such interests are owned by
                           the Company, are owned by the Company free and clear
                           of all liens, encumbrances, equities or claims.

                                    (iii) Development Corp. is validly existing
                           as a corporation in good standing under the laws of
                           the Commonwealth of Pennsylvania, is duly qualified
                           to do business and is in good standing as a foreign
                           corporation in Florida, Maryland, Michigan,
                           Minnesota, New Jersey, North Carolina, Virginia and
                           Wisconsin, and has all corporate power and authority
                           necessary to own or hold its properties and to
                           conduct the business in which it is engaged as
                           described in the Registration Statement and the
                           Prospectus. All of the issued and outstanding capital
                           stock of Development Corp. has been duly authorized
                           and validly issued and is fully paid and
                           non-assessable, has been offered and sold in
                           compliance with all applicable laws (including,
                           without limitation, federal or state securities laws)
                           and all of the capital stock of Development Corp.
                           owned by the Operating Partnership, as described in
                           the Prospectus, is owned free and clear of any
                           security interest, mortgage, pledge, lien,
                           encumbrance, claim, restriction or equities.

                                    (iv) Development-II is validly existing as a
                           corporation in good standing under the laws of the
                           Commonwealth of Pennsylvania, is duly qualified to do
                           business and is in good standing as a foreign
                           corporation in Florida and Texas, and has all
                           corporate power and authority necessary to own or
                           hold its properties and to conduct the business in
                           which it is engaged as described in the Registration
                           Statement and the Prospectus. All of the issued and
                           outstanding capital stock of Development-II has been
                           duly authorized and validly issued and is fully paid
                           and non-assessable, has been offered and sold in
                           compliance with all applicable laws (including,
                           without limitation, federal or state securities laws)
                           and all of the capital stock of Development-II owned
                           by the Operating Partnership, as described in the
                           Prospectus, is owned free and clear of any security
                           interest, mortgage, pledge, lien, encumbrance, claim,
                           restriction or equities.

                                    (v) Development-III is validly existing as a
                           corporation in good standing under the laws of the
                           Commonwealth of Pennsylvania and has all corporate
                           power and authority necessary to own or hold its
                           properties and to conduct the business in which it is
                           engaged as described in the Registration Statement
                           and the Prospectus. All of the issued and outstanding
                           capital stock of Development-III has been duly
                           authorized and validly issued and is fully paid and
                           non-assessable, has been offered and sold in
                           compliance with all applicable laws (including,
                           without limitation, federal or state securities laws)
                           and all of the capital stock of Development-III owned
                           by the Operating Partnership, as described in the


                                       20

                           Prospectus, is owned free and clear of any security
                           interest, mortgage, pledge, lien, encumbrance, claim,
                           restriction or equities.

                                    (vi) SP Trust is validly existing as a
                           business trust in good standing under the laws of the
                           Commonwealth of Pennsylvania and has all trust power
                           and authority necessary to own or hold its properties
                           and to conduct the business in which it is engaged as
                           described in the Registration Statement and the
                           Prospectus. All of the issued and outstanding equity
                           interests of SP Trust have been duly authorized and
                           validly issued and are fully paid and non-assessable,
                           are owned by the Company free and clear of any
                           security interest, mortgage, pledge, lien,
                           encumbrance, claim, restriction or equities and have
                           been offered and sold in compliance with all
                           applicable laws (including, without limitation,
                           federal or state securities laws).

                                    (vii) Each of the Property Affiliates is
                           validly existing as a limited partnership, limited
                           liability company or other entity in good standing
                           under the laws of the jurisdiction in which it was
                           organized, and has all power and authority necessary
                           to own or hold its properties and to conduct the
                           business in which it is engaged. Except as set forth
                           in the Prospectus, all of the partnership interests,
                           membership interests or other equity interests, as
                           the case may be, of each Property Affiliate have been
                           duly and validly authorized and issued, are fully
                           paid and non-assessable and all such interests owned
                           directly or indirectly by the Company and the
                           Operating Partnership, as described in the
                           Prospectus, are owned free and clear of any security
                           interest, mortgage, pledge, lien, encumbrance, claim,
                           restriction or equities.

                                    (viii) (A) This Agreement has been duly and
                           validly authorized, executed and delivered by the
                           Operating Partnership, and has been duly and validly
                           executed and delivered by the Company, and assuming
                           due authorization, execution and delivery by the
                           Underwriters and due authorization by the Company, is
                           a valid and binding agreement of the Operating
                           Partnership; and (B) the Operating Partnership
                           Agreement and the partnership agreement, limited
                           liability company agreement or similar such document
                           of each Property Affiliate, have been duly and
                           validly authorized, executed and delivered by each
                           Transaction Entity party thereto and are valid and
                           binding agreements of the parties thereto,
                           enforceable against such parties in accordance with
                           their terms.

                                    (ix) Each of the Indenture and the
                           Supplemental Indenture has been duly authorized,
                           executed and delivered by the Operating Partnership
                           and (assuming due execution and delivery by the
                           Trustee) constitutes a valid and binding agreement on
                           the part of the Operating Partnership, enforceable
                           against the Operating Partnership in accordance with
                           its terms; each of the Indenture and the Supplemental
                           Indenture conforms in


                                       21

                           all material respects to the descriptions thereof
                           contained in the Prospectus.

                                    (x) The Notes have been duly authorized,
                           executed, issued and delivered by the Operating
                           Partnership, and constitute valid and binding
                           obligations of the Operating Partnership entitled to
                           the benefits of the Indenture and enforceable against
                           the Operating Partnership in accordance with their
                           terms. Upon payment of the purchase price and
                           delivery of the Notes in accordance herewith, each of
                           the Underwriters will receive good, valid and
                           marketable title to the Notes, which to such
                           counsel's knowledge, after due inquiry, are free and
                           clear of all security interests, mortgages, pledges,
                           liens, encumbrances, claims, restrictions and
                           equities. The terms of the Notes conform to all
                           statements and descriptions related thereto contained
                           in the Prospectus. The Notes rank and will rank on a
                           parity with all unsecured indebtedness (other than
                           subordinated indebtedness of the Operating
                           Partnership that is outstanding on the date thereof
                           or that may be incurred thereafter), and senior to
                           all subordinated indebtedness of the Operating
                           Partnership that is outstanding on the date thereof
                           or that may be incurred thereafter, except that the
                           Notes will be effectively subordinated to the prior
                           claims of each secured mortgage lender to any
                           specific Property which secures such lender's
                           mortgage.

                                    (xi) To the knowledge of such counsel, the
                           execution, delivery and performance of this Agreement
                           by each of the Transaction Entities and the
                           consummation of the transactions contemplated hereby
                           will not (i) 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 either of the Transaction
                           Entities or their subsidiaries is a party or by which
                           either of the Transaction Entities or their
                           subsidiaries is bound or to which any of the
                           Properties or other assets of either of the
                           Transaction Entities or their subsidiaries is
                           subject, or (ii) conflict with or result in any
                           violation of the provisions of any statute or any
                           order, rule or regulation of any court or
                           governmental agency or body having jurisdiction over
                           either of the Transaction Entities or their
                           subsidiaries or any of their properties or assets;
                           and except for the registration of the Notes under
                           the Securities Act and the qualification of the
                           Indenture under the Trust Indenture Act and such
                           consents, approvals, authorizations, registrations or
                           qualifications as may be required under the Exchange
                           Act and applicable state securities laws in
                           connection with the purchase and distribution of the
                           Notes by the Underwriters, no consent, approval,
                           authorization or order of, or filing or registration
                           with, any such court or governmental agency or body
                           is required for the execution, delivery and
                           performance of this Agreement, the Indenture or the
                           Supplemental Indenture by the Transaction Entities
                           and the consummation of the transactions contemplated
                           hereby and thereby, and the issuance and delivery of
                           the Notes.


                                       22




            (xii) The issuance and delivery of the Notes by the Operating
      Partnership and the compliance by the Operating Partnership with all of
      the provisions of this Agreement, and the consummation of the transactions
      contemplated hereby, have been duly authorized by all necessary
      partnership action. The execution, delivery and performance of this
      Agreement by each of the Transaction Entities and the consummation of the
      transactions contemplated hereby will not conflict with or result in any
      violation of the provisions of the charter, by-laws, certificate of
      limited partnership or agreement of limited partnership of either of the
      Transaction Entities or their subsidiaries.

            (xiii) Except as set forth in the Prospectus, to the knowledge of
      such counsel, there are no preemptive or other rights to subscribe for or
      to purchase, nor any restriction upon the transfer of the Notes pursuant
      to the Operating Partnership's certificate of limited partnership, its
      agreement of limited partnership, as amended to the date hereof, or any
      agreement or other instrument to which the Operating Partnership is a
      party.

            (xiv) To the knowledge of such counsel, other than as set forth in
      the Prospectus and other than certain persons who have contributed
      Properties to the Partnership in exchange for Units and rights of persons
      whose securities are already registered under the Securities Act, as well
      as persons who may acquire preferred shares of the Company in exchange for
      preferred units of partnership interest in the Operating Partnership,
      there are no contracts, agreements or understandings between the Company
      and/or the Operating Partnership, on the one hand, and any person, on the
      other hand, granting such person the right to require the Company or the
      Operating Partnership to file a registration statement under the
      Securities Act with respect to any securities of the Company or the
      Operating Partnership owned or to be owned by such person or to require
      the Company or the Operating Partnership to include such securities in the
      securities registered pursuant to the Registration Statement or in any
      securities being registered pursuant to any other registration statement
      filed by the Company or the Operating Partnership under the Securities
      Act.

            (xv) To the knowledge of such counsel, there are no legal or
      governmental proceedings pending to which either Transaction Entity or
      their subsidiaries is a party or of which any property or assets of either
      Transaction Entity or their subsidiaries is the subject which are not
      disclosed in the Prospectus and which, if determined adversely to such
      Transaction Entity or subsidiary, might reasonably be expected to have a
      material adverse effect on the consolidated financial position,
      shareholders' equity, results of operations, business or prospects of the
      Company; and to the knowledge of such counsel no such proceedings are
      threatened or contemplated by governmental authorities or threatened by
      others.


                                       23

            (xvi) To the knowledge of such counsel, there are no contracts or
      other documents which are required to be described in the Prospectus or
      filed as exhibits to the Registration Statement by the Securities Act or
      by the Rules and Regulations which have not been described in the
      Prospectus or filed as exhibits to the Registration Statement or
      incorporated therein by reference as permitted by the Rules and
      Regulations.

            (xvii) To the knowledge of such counsel, no relationship, direct or
      indirect, exists between or among either of the Transaction Entities on
      the one hand, and the trustees, officers, shareholders, customers or
      suppliers of the Transaction Entities on the other hand, which is required
      by Item 404 of Regulation S-K to be described in the Prospectus which is
      not so described.

            (xviii) To the knowledge of such counsel, each "pension plan"
      maintained by either Transaction Entity that is intended to be qualified
      under section 401(a) of the Code is (i) so qualified in all material
      respects and nothing has occurred, whether by action or by failure to act,
      which would cause the loss of such qualification and (ii) in compliance in
      all material respects with all presently applicable provisions of ERISA;
      to the knowledge of such counsel, no Transaction Entity has received
      notification of a "reportable event" (as defined in ERISA) with respect to
      any "pension plan" (as defined in ERISA) for which either Transaction
      Entity would have any liability; to the knowledge of such counsel, neither
      Transaction Entity has incurred or expects to incur, liability under (i)
      Title IV of ERISA with respect to termination of, or withdrawal from, any
      "pension plan" or (ii) section 412 or 4971 of the Code.

            (xix) To the knowledge of such counsel, no Transaction Entity or
      Property Affiliate is in violation of its charter, by-laws, certificate of
      limited partnership, agreement of limited partnership, or other similar
      organizational document, nor, to the knowledge of such counsel, has a
      default been asserted in any respect, and it has not been asserted that
      any event has occurred which, with notice or lapse of time or both, would
      constitute such a default, in the due performance or observance of any
      term, covenant or condition contained in any material indenture, mortgage,
      deed of trust, loan agreement or other material agreement or instrument to
      which it is a party or by which it is bound or to which any of the
      Properties or any of its other properties or assets is subject.

            (xx) No consent, approval, authorization or other order of, or
      registration or filing with, any court, regulatory body, administrative
      agency or other governmental body, agency, or official is required on the
      part of the Company (except as have been obtained under the Securities Act
      and the Exchange Act or such as may be required under state securities,
      real estate syndication or Blue Sky laws governing the purchase


                                       24

      and distribution of the Notes) for the valid issuance and sale of the
      Notes to the Underwriters as contemplated by this Agreement.

            (xxi) Neither Transaction Entity nor any of their subsidiaries is an
      "investment company" within the meaning of such term under the Investment
      Company Act of 1940 and the rules and regulations of the Commission
      thereunder.

            (xxii) The documents incorporated or deemed to be incorporated by
      reference in the Prospectus pursuant to Item 12 of Form S-3 under the
      Securities Act (other than the financial statements and related schedules
      and financial information and data included therein, as to which no
      opinion need be rendered), at the time they were filed with the
      Commission, complied and will comply as to form in all material respects
      with the requirements of the Exchange Act and the rules and regulations
      thereunder.

            (xxiii) The Registration Statement was declared effective under the
      Securities Act and the Indenture was duly qualified under the Trust
      Indenture Act as of the date and time specified in such opinion, the
      Prospectus was filed with the Commission pursuant to the subparagraph of
      Rule 424(b) of the Rules and Regulations specified in such opinion on the
      date specified therein and, to the knowledge of such counsel, no stop
      order suspending the effectiveness of the Registration Statement has been
      issued and, to the knowledge of such counsel, no proceeding for that
      purpose is pending or threatened by the Commission.

            (xxiv) The Registration Statement and the Prospectus and any further
      amendments or supplements thereto made by the Company prior to the
      Delivery Date (other than the financial statements and related schedules
      and other financial information and data included therein, as to which
      such counsel need express no opinion) comply as to form in all material
      respects with the requirements of the Securities Act, the Rules and
      Regulations and the Trust Indenture Act and the rules and regulations
      thereunder, and the Indenture conforms in all material respects to the
      requirements of the Trust Indenture Act and the rules and regulations
      thereunder.

            (xxv) The statements contained in the Prospectus under the captions
      "Risk Factors," "Description of Debt Securities," "Description of
      Preferred Shares," "Description of Warrants," "Description of Notes," and
      "Federal Income Tax Considerations with Respect to the Trust and the
      Operating Partnership" together with "Certain Federal Income Tax
      Considerations," insofar as those statements are descriptions of
      contracts, agreements or other legal documents, or they describe federal
      statutes, rules and regulations, and except to the extent such statements
      are statistics or calculations constitute a fair summary thereof.


                                       25

      In rendering such opinion, such counsel may (i) state that its opinion is
      limited to matters governed by the Federal laws of the United States of
      America, the laws of the Commonwealth of Pennsylvania and the laws of the
      State of Maryland; (ii) as to matters of Maryland law, state that its
      opinion is given solely in reliance upon the opinion of Saul Ewing LLP;
      (iii) state that its opinion does not address (A) Federal Reserve Board
      margin regulations; (B) Federal or state antitrust and unfair competition
      laws and regulations; (C) Local Laws (as defined in The Legal Opinion
      Accord of the ABA Section of Business Law (1991); (D) compliance with
      fiduciary duty requirements; (E) Federal and state racketeering laws and
      regulations; (F) Federal and state health and safety laws and regulations;
      and (G) Federal and state laws, regulations and policies concerning (x)
      national and local emergency, (y) possible judicial deference to acts of
      foreign states, and (z) criminal and civil forfeiture laws; and (iv) in
      giving the opinion referred to in subclause (B) in Section
      7(d)(A)(vii)(A), state that such opinion with respect to the
      enforceability of such documents may be limited by bankruptcy, fraudulent
      conveyance, insolvency, reorganization, moratorium, and other laws
      relating to or affecting creditors' rights generally and by general
      equitable principles. Such counsel shall also have furnished to the
      Underwriters a written statement, addressed to the Underwriters and dated
      the Delivery Date, in form and substance satisfactory to the Underwriters,
      to the effect that (x) such counsel has acted as counsel to the Company in
      connection with the preparation of the Registration Statement and the
      Prospectus, and (y) based on the foregoing, no facts have come to the
      attention of such counsel which lead it to believe that the Registration
      Statement, as of the Effective Date, contained any untrue statement of a
      material fact or omitted to state a material fact required to be stated
      therein or necessary in order to make the statements therein not
      misleading, or that the Prospectus contains any untrue statement of a
      material fact or omits to state a material fact required to be stated
      therein or necessary in order to make the statements therein, in light of
      the circumstances under which they were made, not misleading. The
      foregoing opinion and statement may be qualified by a statement to the
      effect that such counsel does not assume any responsibility for the
      accuracy, completeness or fairness of the statements contained in the
      Registration Statement or the Prospectus except to the extent of the
      opinion contained in Section 7(d)(A)(xxii), and may state that such
      counsel expresses no belief with respect to the financial statements and
      notes thereto and other financial information and data included or
      incorporated by reference in, or omitted from, the Registration Statement
      or the Prospectus or the Statement of Eligibility on Form T-1 of the
      Trustee.

                  (B) Saul Ewing LLP shall have furnished to the Underwriters
      its written opinion, as Maryland counsel to the Company, addressed to the
      Underwriters and dated the Delivery Date, in form and substance reasonably
      satisfactory to the Underwriters, to the effect that:

                  (i) The Company has been duly formed and is validly existing
            as a real estate investment trust in good standing under and by
            virtue of the laws of the State of Maryland, and has all trust power
            and authority necessary to own or hold its properties and to conduct
            the business in


                                       26

            which it is engaged as described in the Registration Statement
            and the Prospectus, and to enter into and perform its obligations
            under this Agreement.

                  (ii) This Agreement has been duly and validly authorized,
            executed and delivered by the Company, and assuming due
            authorization, execution and delivery by the Underwriters and the
            Operating Partnership, is a valid and binding agreement of the
            Company except as limited by (a) bankruptcy, insolvency,
            reorganization, moratorium, fraudulent conveyance or other laws
            relating to or affecting the enforcement of creditors' rights or (b)
            general equitable principles.

                  (iii) To the knowledge of such counsel, the execution,
            delivery and performance of this Agreement by the Company and the
            consummation of the transactions contemplated hereby will not
            conflict with or result in any violation of the provisions of any
            statute or any order, rule or regulation of any court or
            governmental agency or body of the State of Maryland that has
            jurisdiction over the Company or any of its properties or assets.

                  (iv) The execution, delivery and performance of this Agreement
            by the Company and the consummation of the transactions contemplated
            hereby will not conflict with or result in any violation of the
            provisions of the Declaration of Trust or by-laws of the Company.

                  (v) To the knowledge of such counsel, there are no legal or
            governmental proceedings pending to which the Company is a party or
            of which any property or assets of the Company is the subject which
            are not disclosed in the Prospectus and which, if determined
            adversely to the Company, might reasonably be expected to have a
            material adverse effect on the consolidated financial position,
            shareholders' equity, results of operations, business or prospects
            of the Company; and to the best knowledge of such counsel no such
            proceedings are threatened or contemplated by governmental
            authorities or threatened by others.

      Such counsel shall state that Clifford Chance Rogers & Wells LLP, counsel
      for the Underwriters, may rely on its opinion.

            (e) Wolf, Block, Schorr and Solis-Cohen LLP shall have furnished to
      the Underwriters its written opinion, dated the Delivery Date, with
      respect to such tax matters, including without limitation the
      qualification of the Company as a real estate investment trust and the
      classification of the Operating Partnership as a partnership (and not as a
      corporation) for federal income tax purposes, as the Underwriters may
      reasonably require.

            (f) The Underwriters shall have received from Clifford Chance Rogers
      & Wells LLP, counsel for the Underwriters, such opinion or opinions, dated
      the


                                       27

      Delivery Date, with respect to the issuance and sale of the Notes, the
      Registration Statement, the Prospectus and other related matters as the
      Underwriters may reasonably require, and the Company shall have furnished
      to such counsel such documents as they reasonably request for the purpose
      of enabling them to pass upon such matters.

            (g) At the time of execution of this Agreement, the Underwriters
      shall have received from Ernst & Young LLP a letter, in form and substance
      satisfactory to the Underwriters, addressed to the Underwriters and dated
      the date hereof (i) confirming that they are independent public
      accountants within the meaning of the Securities Act and are in compliance
      with the applicable requirements relating to the qualification of
      accountants under Rule 2-01 of Regulation S-X of the Commission, and (ii)
      stating, as of the date hereof (or, with respect to matters involving
      changes or developments since the respective dates as of which specified
      financial information is given in, or incorporated by reference in, the
      Prospectus, as of a date not more than five days prior to the date
      hereof), the conclusions and findings of such firm with respect to the
      financial information and other matters ordinarily covered by accountants'
      "comfort letters" to underwriters in connection with registered public
      offerings.

            (h) With respect to the letter of Ernst & Young LLP referred to in
      the preceding paragraph and delivered to the Underwriters concurrently
      with the execution of this Agreement (the "initial letter"), the
      Underwriters shall have received from Ernst & Young a letter (the
      "bring-down letter"), addressed to the Underwriters and dated the Delivery
      Date (i) confirming that they are independent public accountants within
      the meaning of the Securities Act and are in compliance with the
      applicable requirements relating to the qualification of accountants under
      Rule 2-01 of Regulation S-X of the Commission, (ii) stating, as of the
      date of the bring-down letter (or, with respect to matters involving
      changes or developments since the respective dates as of which specified
      financial information is given in the Prospectus, as of a date not more
      than five days prior to the date of the bring-down letter), the
      conclusions and findings of such firm with respect to the financial
      information and other matters covered by the initial letter and (iii)
      confirming in all material respects the conclusions and findings set forth
      in the initial letter.

            (i) The Transaction Entities shall have furnished to the
      Underwriters a certificate, dated the Delivery Date, of the Chairman of
      the Board, Chief Executive Officer, President or a Vice President of the
      Company and the chief financial officer of the Company (in each case, for
      the Company and for the Company as general partner of the Operating
      Partnership) stating that:

                  (i) The representations, warranties and agreements of the
            Transaction Entities in Section 1 are true and correct as of the
            Delivery Date; the Transaction Entities complied with all of their
            agreements contained herein; and the conditions set forth in
            Sections 7(a) and 7(i) have been fulfilled; and


                                       28

                  (ii) They have carefully examined the Registration Statement
            and the Prospectus and, in their opinion (A) as of the Effective
            Date, the Registration Statement and Prospectus did not include any
            untrue statement of a material fact and did not omit to state a
            material fact required to be stated therein or necessary to make the
            statements therein not misleading (with respect to the Prospectus,
            in light of the circumstances in which they were made), and (B)
            since the Effective Date no event has occurred which should have
            been set forth in a supplement or amendment to the Registration
            Statement or the Prospectus.

            (j) (i) None of the Transaction Entities or their subsidiaries or
      any Property shall have sustained since the date of the latest audited
      financial statements included in the Prospectus any loss or interference
      with its business 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 set forth or
      contemplated in the Prospectus or (ii) since such date there shall not
      have been any change in the capital stock or long-term debt of either
      Transaction Entity or any change, or any development involving a
      prospective change, in or affecting any Property Affiliate or Property or
      the general affairs, management, financial position, shareholders' equity
      or results of operations of either Transaction Entity, otherwise than as
      set forth or contemplated in the Prospectus, the effect of which, in any
      such case described in clause (i) or (ii), is, in the judgment of the
      Underwriters, so material and adverse as to make it impracticable or
      inadvisable to proceed with the public offering or the delivery of the
      Notes being delivered on the Delivery Date on the terms and in the manner
      contemplated in the Prospectus.

            (k) Subsequent to the execution and delivery of this Agreement there
      shall not have occurred any of the following: (i) trading in securities
      generally on the New York Stock Exchange or the American Stock Exchange or
      in the over-the-counter market, or trading in any securities of the
      Company on any exchange or in the over-the-counter market, shall have been
      suspended or minimum prices shall have been established on any such
      exchange or such market by the Commission, by such exchange or by any
      other regulatory body or governmental authority having jurisdiction, (ii)
      a banking moratorium shall have been declared by Federal or state
      authorities or there shall have occurred a material disruption in
      commercial banking or securities settlement or clearance services in the
      United States, (iii) the United States shall have become engaged in
      hostilities, there shall have been an escalation in hostilities involving
      the United States or there shall have been a declaration of a national
      emergency or war by the United States or (iv) there shall have occurred
      any other calamity or crisis in the United States or elsewhere resulting
      in a material disruption in the financial markets in the United States or
      there shall have occurred such a material adverse change in general
      economic, political or financial conditions (or the effect of
      international conditions on the financial markets in the United States
      shall be such) as to make it, in the judgment of a majority in interest of
      the several Underwriters, impracticable or inadvisable to proceed with the
      public offering or delivery of the


                                       29

      Notes being delivered on the Delivery Date on the terms and in the manner
      contemplated in the Prospectus.

            (l) Subsequent to the execution and delivery of this Agreement (i)
      no downgrading shall have occurred in the rating accorded the Operating
      Partnership's debt securities by any "nationally recognized statistical
      rating organization," as that term is defined by the Commission for
      purposes of Rule 436(g)(2) of the Rules and Regulations and (ii) no such
      organization shall have publicly announced that it has under surveillance
      or review, with possible negative implications, its rating of any of the
      Operating Partnership's debt securities.

            (m) The Transaction Entities shall not have failed at or prior to
      the Delivery Date to have performed or complied with any of their
      agreements herein contained and required to be performed or complied with
      by them hereunder at or prior to the Delivery Date.

            (n) On the Delivery Date, counsel for the Underwriters shall have
      been furnished with such documents and opinions as they may require for
      the purpose of enabling them to pass upon the issuance and sale of the
      Notes as herein contemplated and related proceedings, or in order to
      evidence the accuracy of any of the representations or warranties, or the
      fulfillment of any of the conditions, herein contained; and all
      proceedings taken by the Transaction Entities in connection with the
      issuance and sale of the Notes as herein contemplated shall be
      satisfactory in form and substance to the Underwriters and counsel for the
      Underwriters.

            (o) The Operating Partnership shall have furnished or caused to be
      furnished to the Underwriters such further certificates and documents as
      the Underwriters shall have reasonably requested.

            All opinions, letters, evidence and certificates mentioned above or
elsewhere in this Agreement shall be deemed to be in compliance with the
provisions hereof only if they are in form and substance reasonably satisfactory
to counsel for the Underwriters.

            Any certificate or document signed by any officer of the Transaction
Entities and delivered to the Underwriters, or to counsel for the Underwriters,
shall be deemed a representation and warranty by the Transaction Entities to
each Underwriter as to the statements made therein.

            8. Effective Date of Agreement. This Agreement shall become
effective: (i) upon the execution hereof by the parties hereto; or (ii) if, at
the time this Agreement is executed and delivered, it is necessary for the
Registration Statement or a post-effective amendment thereto to be declared
effective before the offering of the Notes may commence, when notification of
the effectiveness of the Registration Statement or such post-effective amendment
has been released by the Commission.


                                       30

            9. Default by One or More of the Underwriters. If, on the Delivery
Date, any Underwriter defaults in the performance of its obligations under this
Agreement, the remaining non-defaulting Underwriters shall be obligated to
purchase the Notes which the defaulting Underwriter agreed but failed to
purchase on the Delivery Date in the respective proportions which the principal
amount of Notes set forth opposite the name of each remaining non-defaulting
Underwriter in Schedule I hereto bears to the total aggregate principal amount
of Notes set forth opposite the names of all the remaining non-defaulting
Underwriters in Schedule I hereto; provided, however, that the remaining
non-defaulting Underwriters shall not be obligated to purchase any of the Notes
on the Delivery Date if the total aggregate principal amount of Notes which the
defaulting Underwriter or Underwriters agreed but failed to purchase on such
date exceeds 9.09% of the total aggregate principal amount of Notes to be
purchased on the Delivery Date, and any remaining non-defaulting Underwriter
shall not be obligated to purchase more than 110% of the aggregate principal
amount of Notes which it agreed to purchase on the Delivery Date pursuant to the
terms of Section 2. If the foregoing maximums are exceeded, the remaining
non-defaulting Underwriters, or those other underwriters satisfactory to the
Underwriters who so agree, shall have the right, but shall not be obligated, to
purchase, in such proportion as may be agreed upon among them, all the Notes to
be purchased on the Delivery Date. If the remaining Underwriters or other
underwriters satisfactory to the Underwriters do not elect to purchase the Notes
which the defaulting Underwriter or Underwriters agreed but failed to purchase
on the Delivery Date, this Agreement shall terminate without liability on the
part of any non-defaulting Underwriter or the Transaction Entities, except that
the Transaction Entities will continue to be liable for the payment of expenses
to the extent set forth in Sections 6 and 12. As used in this Agreement, the
term "Underwriter" includes, for all purposes of this Agreement unless the
context requires otherwise, any party not listed in Schedule I hereto who,
pursuant to this Section 9, purchases Notes which a defaulting Underwriter
agreed but failed to purchase.

            Nothing contained herein shall relieve a defaulting Underwriter of
any liability it may have to the Transaction Entities for damages caused by its
default. If other underwriters are obligated or agree to purchase the Notes of a
defaulting or withdrawing Underwriter, either the Underwriters or the Company
may postpone the Delivery Date for up to seven full business days in order to
effect any changes that in the opinion of counsel for the Operating Partnership
or counsel for the Underwriters may be necessary in the Registration Statement,
the Prospectus or in any other document or arrangement.

            10. Indemnification and Contribution.

            (a) The Transaction Entities jointly and severally, shall indemnify
and hold harmless each Underwriter, its officers and employees and each person,
if any, who controls any Underwriter within the meaning of the Securities Act,
from and against any loss, claim, damage or liability, joint or several, or any
action in respect thereof (including, but not limited to, any loss, claim,
damage, liability or action relating to purchases and sales of Notes), to which
that Underwriter, officer, employee or controlling person may become subject,
under the Securities Act or otherwise, insofar as such loss, claim, damage,
liability or action arises out of, or is based upon, (i) any untrue statement or
alleged untrue statement of a material fact contained (A) in any Preliminary
Prospectus, the Registration Statement or the Prospectus or in any amendment or
supplement thereto or (B) in any blue sky application or other document prepared
or executed by


                                       31

the Operating Partnership (or based upon any written information furnished by
the Operating Partnership) specifically for the purpose of qualifying any or all
of the Notes under the securities laws of any state or other jurisdiction (any
such application, document or information being hereinafter called a "Blue Sky
Application"), (ii) the omission or alleged omission to state in any Preliminary
Prospectus, the Registration Statement or the Prospectus, or in any amendment or
supplement thereto, or in any Blue Sky Application any material fact required to
be stated therein or necessary to make the statements therein not misleading
(with respect to the Prospectus, in light of the circumstances under which they
were made), or (iii) any act or failure to act or any alleged act or failure to
act by any Underwriter in connection with, or relating in any manner to, the
Notes or the offering contemplated hereby, and which is included as part of or
referred to in any loss, claim, damage, liability or action arising out of or
based upon matters covered by clause (i) or (ii) above (provided that the
Transaction Entities shall not be liable under this clause (iii) to the extent
that it is determined in a final judgment by a court of competent jurisdiction
that such loss, claim, damage, liability or action resulted directly from any
such acts or failures to act undertaken or omitted to be taken by such
Underwriter through its gross negligence or willful misconduct), and shall
reimburse each Underwriter and each such officer, employee or controlling person
for any legal or other expenses reasonably incurred by that Underwriter,
officer, employee or controlling person in connection with investigating or
defending or preparing to defend against any such loss, claim, damage, liability
or action as such expenses are incurred; provided, however, that the Transaction
Entities shall not be liable in any such case to the extent that any such loss,
claim, damage, liability or action arises out of, or is based upon, any untrue
statement or alleged untrue statement or omission or alleged omission made in
any Preliminary Prospectus, the Registration Statement or the Prospectus, or in
any such amendment or supplement, or in any Blue Sky Application, in reliance
upon and in conformity with written information concerning such Underwriter
furnished to the Transaction Entities through the Underwriters by or on behalf
of any Underwriter specifically for inclusion therein; provided further, that
the Transaction Entities shall not be liable in any such case to the extent that
any such loss, claim, damage, liability or action to or by any person arises out
of, or is based upon, any untrue statement or omission of material fact made in
any prospectus, to the extent that any such loss, claim, damage or liability or
action to or by such person results from the fact that (i) the Company had
previously furnished copies of the Prospectus to the Underwriters, (ii) delivery
of the Prospectus was required by the Securities Act to be made to such person,
(iii) the untrue statement or omission of a material fact contained in the
prospectus was corrected in the Prospectus, (iv) there was not sent or given to
such person, at or prior to the written confirmation of the sale of such
securities to such person, a copy of the Prospectus and (v) such correction
would have cured the defect giving rise to such loss, damage or liability. The
foregoing indemnity agreement is in addition to any liability which the
Transaction Entities may otherwise have to any Underwriter or to any officer,
employee or controlling person of that Underwriter.

            (b) Each Underwriter, severally and not jointly, shall indemnify and
hold harmless each Transaction Entity, its officers and employees, each of its
trustees, and each person, if any, who controls each Transaction Entity within
the meaning of the Securities Act, from and against any loss, claim, damage or
liability, joint or several, or any action in respect thereof, to which each
Transaction Entity or any such trustee, officer or controlling person may become
subject, under the Securities Act or otherwise, insofar as such loss, claim,
damage, liability or action arises out of, or is based upon, (i) any untrue
statement or alleged untrue statement of a material fact contained (A) in any
Preliminary Prospectus, the Registration


                                       32

Statement or the Prospectus or in any amendment or supplement thereto, or (B) in
any Blue Sky Application or (ii) the omission or alleged omission to state in
any Preliminary Prospectus, the Registration Statement or the Prospectus, or in
any amendment or supplement thereto, or in any Blue Sky Application any material
fact required to be stated therein or necessary to make the statements therein
not misleading, but in each case only to the extent that the untrue statement or
alleged untrue statement or omission or alleged omission was made in reliance
upon and in conformity with written information concerning such Underwriter
furnished to the Transaction Entities through the Underwriters by or on behalf
of that Underwriter specifically for inclusion therein, and shall reimburse each
Transaction Entity and any such trustee, officer or controlling person for any
legal or other expenses reasonably incurred by each Transaction Entity or any
such trustee, officer or controlling person in connection with investigating or
defending or preparing to defend against any such loss, claim, damage, liability
or action as such expenses are incurred. The foregoing indemnity agreement is in
addition to any liability which any Underwriter may otherwise have to each
Transaction Entity or any such trustee, officer, employee or controlling person.

            (c) Promptly after receipt by an indemnified party under this
Section 10 of notice of any claim or the commencement of any action, the
indemnified party shall, if a claim in respect thereof is to be made against the
indemnifying party under this Section 10, notify the indemnifying party in
writing of the claim or the commencement of that action; provided, however, that
the failure to notify the indemnifying party shall not relieve it from any
liability which it may have under this Section 10 except to the extent it has
been materially prejudiced by such failure and, provided further, that the
failure to notify the indemnifying party shall not relieve it from any liability
which it may have to an indemnified party otherwise than under this Section 10.
If any such claim or action shall be brought against an indemnified party, and
it shall notify the indemnifying party thereof, the indemnifying party shall be
entitled to participate therein and, to the extent that it wishes, jointly with
any other similarly notified indemnifying party, to assume the defense thereof
with counsel reasonably satisfactory to the indemnified party. After notice from
the indemnifying party to the indemnified party of its election to assume the
defense of such claim or action, the indemnifying party shall not be liable to
the indemnified party under this Section 10 for any legal or other expenses
subsequently incurred by the indemnified party in connection with the defense
thereof other than reasonable costs of investigation; provided, however, that
the indemnified party shall have the right to employ its own counsel, with such
counsel, in the case of the Underwriters, to represent jointly the Underwriters
and their respective officers, employees and controlling persons who may be
subject to liability arising out of any claim in respect of which indemnity may
be sought by the Underwriters against the Transaction Entities under this
Section 10 if, in the reasonable judgment of the Underwriters, it is advisable
for the Underwriters and those officers, employees and controlling persons to be
jointly represented by separate counsel, and in that event the fees and expenses
of such separate counsel shall be paid by the Transaction Entities. No
indemnifying party shall (i) without the prior written consent of the
indemnified parties (which consent shall not be unreasonably withheld), settle
or compromise or consent to the entry of any judgment with respect to any
pending or threatened claim, action, suit or proceeding in respect of which
indemnification or contribution may be sought hereunder (whether or not the
indemnified parties are actual or potential parties to such claim or action)
unless such settlement, compromise or consent includes an unconditional release
of each indemnified party from all liability arising out of such claim, action,
suit or proceeding, or (ii) be liable for any settlement of any such action


                                       33

effected without its written consent (which consent shall not be unreasonably
withheld), but if settled with the consent of the indemnifying party or if there
be a final judgment of the plaintiff in any such action, the indemnifying party
agrees to indemnify and hold harmless any indemnified party from and against any
loss or liability by reason of such settlement or judgment.

            (d) If the indemnification provided for in this Section 10 shall for
any reason be unavailable to or insufficient to hold harmless an indemnified
party under Section 10(a) or 10(c) in respect of any loss, claim, damage or
liability, or any action in respect thereof, referred to therein, then each
indemnifying party shall, in lieu of indemnifying such indemnified party,
contribute to the amount paid or payable by such indemnified party as a result
of such loss, claim, damage or liability, or action in respect thereof, (i) in
such proportion as shall be appropriate to reflect the relative benefits
received by the Transaction Entities on the one hand and the Underwriters on the
other from the offering of the Notes 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 Transaction Entities, on the one hand,
and the Underwriters, on the other hand, with respect to the statements or
omissions which resulted in such loss, claim, damage or liability, or action in
respect thereof, as well as any other relevant equitable considerations. The
relative benefits received by the Transaction Entities, on the one hand, and the
Underwriters, on the other hand, with respect to such offering shall be deemed
to be in the same proportion as the total net proceeds from the offering of the
Notes purchased under this Agreement (before deducting expenses) received by the
Transaction Entities, on the one hand, and the total underwriting discounts and
commissions received by the Underwriters with respect to the Notes purchased
under this Agreement, on the other hand, bear to the total gross proceeds from
the offering of the Notes under this Agreement, in each case as set forth in the
table on the cover page of the Prospectus. The relative fault shall be
determined by reference to whether the untrue or alleged untrue statement of a
material fact or omission or alleged omission to state a material fact relates
to information supplied by the Transaction Entities or the Underwriters, the
intent of the parties and their relative knowledge, access to information and
opportunity to correct or prevent such statement or omission. The Transaction
Entities and the Underwriters agree that it would not be just and equitable if
contributions pursuant to this Section were to be determined by pro rata
allocation (even if the Underwriters were treated as one entity for such
purpose) or by any other method of allocation which does not take into account
the equitable considerations referred to herein. The amount paid or payable by
an indemnified party as a result of the loss, claim, damage or liability, or
action in respect thereof, referred to above in this Section shall be deemed to
include, for purposes of this Section 10(d), any legal or other expenses
reasonably incurred by such indemnified party in connection with investigating
or defending any such action or claim. Notwithstanding the provisions of this
Section 10(d), no Underwriter shall be required to contribute any amount in
excess of the amount by which the total price at which the Notes underwritten by
it and distributed to the public was offered to the public exceeds the amount of
any damages which such Underwriter has otherwise paid or become liable to pay by
reason of any untrue or alleged untrue statement or omission or alleged
omission. No person guilty of fraudulent misrepresentation (within the meaning
of section 11(f) of the Securities Act) shall be entitled to contribution from
any person who was not guilty of such fraudulent misrepresentation. The
Underwriters' obligations to contribute as provided in this Section 10(d) are
several in proportion to their respective underwriting obligations and not
joint.


                                       34

            (e) The Underwriters severally confirm and each Transaction Entity
acknowledges that the statements on page S-13 of the Prospectus Supplement (i)
with respect to the concession and reallowance figures in the third paragraph
and (ii) in the eighth paragraph, are correct and constitute the only
information concerning such Underwriters furnished in writing to the Transaction
Entities by or on behalf of the Underwriters specifically for inclusion in the
Registration Statement, the Preliminary Prospectus, if any, and the Prospectus.

            11. Termination. The obligations of the Underwriters hereunder may
be terminated by the Underwriters by notice given to and received by the
Operating Partnership prior to delivery of and payment for the Notes if, prior
to that time, any of the events described in Sections 7(i), 7(j), 7(k), 7(l) or
7(m), shall have occurred or if the Underwriters shall decline to purchase the
Notes for any reason permitted under this Agreement.

            12. Reimbursement of Underwriters' Expenses. If the Operating
Partnership shall fail to tender the Notes for delivery to the Underwriters by
reason of any failure, refusal or inability on the part of the Transaction
Entities to perform any agreement on their part to be performed, or because any
other condition of the Underwriters' obligations hereunder required to be
fulfilled by the Transaction Entities is not fulfilled, the Transaction Entities
will reimburse the Underwriters for all reasonable out-of-pocket expenses
(including fees and disbursements of counsel) incurred by the Underwriters in
connection with this Agreement and the proposed purchase of the Notes, and upon
demand the Transaction Entities shall pay the full amount thereof to the
Underwriters. If this Agreement is terminated pursuant to Section 9 by reason of
the default of one or more Underwriters, the Transaction Entities shall not be
obligated to reimburse any defaulting Underwriter on account of those expenses.

            13. Notices, etc. All statements, requests, notices and agreements
hereunder shall be in writing, and:

                  (a) if to the Underwriters, shall be delivered or sent by
            mail, telex or facsimile transmission to Lehman Brothers Inc., 745
            Seventh Avenue, New York, New York 10019, Attention: Syndicate
            Department (Fax: 212-526-6588), with a copy, in the case of any
            notice pursuant to Section 10(c), to the Director of Litigation,
            Office of the General Counsel, Lehman Brothers Inc., 745 Seventh
            Avenue, New York, New York 10019;

                  (b) if to the Transaction Entities shall be delivered or sent
            by mail, telex or facsimile transmission to the Company, 65 Valley
            Stream Parkway, Malvern, PA 19355, Attention: General Counsel (Fax:
            610-644-2175);

provided, however, that any notice to an Underwriter pursuant to Section 10(c)
shall be delivered or sent by mail, telex or facsimile transmission to such
Underwriter at its address set forth in its acceptance telex to the
Underwriters, which address will be supplied to any other party hereto by the
Underwriters upon request. Any such statements, requests, notices or agreements
shall take effect at the time of receipt thereof. The Transaction Entities shall
be entitled to act and rely upon any request, consent, notice or agreement given
or made on behalf of the Underwriters by Lehman Brothers Inc.


                                       35

            14. Persons Entitled to Benefit of Agreement. This Agreement shall
inure to the benefit of and be binding upon the Underwriters, the Transaction
Entities and their respective personal representatives and successors. This
Agreement and the terms and provisions hereof are for the sole benefit of only
those persons, except that (A) the representations, warranties, indemnities and
agreements of the Transaction Entities contained in this Agreement shall also be
deemed to be for the benefit of the person or persons, if any, who control any
Underwriter within the meaning of Section 15 of the Securities Act and (B) the
indemnity agreement of the Underwriters contained in Section 10(b) of this
Agreement shall be deemed to be for the benefit of trustees of the Company,
officers of the Company who have signed the Registration Statement and any
person controlling the Transaction Entities within the meaning of section 15 of
the Securities Act. Nothing in this Agreement is intended or shall be construed
to give any person, other than the persons referred to in this Section 14, any
legal or equitable right, remedy or claim under or in respect of this Agreement
or any provision contained herein.

            15. Survival. The respective indemnities, representations,
warranties and agreements of the Transaction Entities and the Underwriters
contained in this Agreement or made by or on behalf on them, respectively,
pursuant to this Agreement, shall survive the delivery of and payment for the
Notes and shall remain in full force and effect, regardless of any investigation
made by or on behalf of any of them or any person controlling any of them.

            16. Definition of the Terms "Business Day" and "Subsidiary". For
purposes of this Agreement, (a) "business day" means any day on which the New
York Stock Exchange, Inc. is open for trading and (b) "subsidiary" has the
meaning set forth in Rule 405 of the Rules and Regulations.

            17. Governing Law. This Agreement shall be governed by and construed
in accordance with the laws of New York.

            18. Counterparts. This Agreement may be executed in one or more
counterparts and, if executed in more than one counterpart, the executed
counterparts shall each be deemed to be an original but all such counterparts
shall together constitute one and the same instrument.

            19. Headings. The headings herein are inserted for convenience of
reference only and are not intended to be part of, or to affect the meaning or
interpretation of, this Agreement.


                                       36

            If the foregoing correctly sets forth the agreement between the
Company and the Underwriters, please indicate your acceptance in the space
provided for that purpose below.


                              Very truly yours,

                              LIBERTY PROPERTY TRUST



                              By /s/ Willard G. Rouse III
                                 ----------------------------------------------
                                 Name:        Willard G. Rouse III
                                 Title:       Chairman of the Board and Chief
                                              Executive Officer



                              LIBERTY PROPERTY LIMITED PARTNERSHIP

                              By:   Liberty Property Trust, its general partner


                              By:/s/ Willard G. Rouse III
                                 ----------------------------------------------
                                 Name:     Willard G. Rouse III
                                 Title:    Chairman of the Board and Chief
                                           Executive Officer



Accepted:


LEHMAN BROTHERS INC.



By:/s/ Frederick T. Caven, Jr.
   -----------------------------------
         Authorized Representative

For itself and on behalf of
the Underwriters


                                       37

                                   SCHEDULE I




                                                 PRINCIPAL
       UNDERWRITERS                            AMOUNT OF NOTES
       ------------                           -----------------
                                           
Lehman Brothers Inc.                              $87,000,000.00
Banc One Capital Markets, Inc.                    $ 10,500,000
Credit Suisse First Boston Corporation            $ 10,500,000
Wachovia Securities, Inc.                         $ 10,500,000
Goldman, Sachs & Co.                              $ 10,500,000
J.P. Morgan Securities Inc.                       $ 10,500,000
Salomon Smith Barney Inc.                         $ 10,500,000
                                                  ------------
                                                  $150,000,000
                                                  ============



                                       38

                                   SCHEDULE II



Senior Notes Due 2012


                                                  
Principal Amount                                     $150,000,000.00
Coupon:                                              6.375%
Settlement Date:                                     August 22, 2000

Price to Public:                                     99.558%
Price to Public:                                     $149,337,000

Underwriting Discount:                               0.650%
Underwriting Discount:                               $975,000

Price to Company:                                    98.908%
Proceeds to the Company (before expenses)            $148,362,000

Maturity Date:                                       August 15, 2012



                                       39

                                  SCHEDULE III


Florida, Kansas, Maryland, Michigan, Minnesota, New Jersey, North Carolina,
South Carolina, Texas, Virginia and Wisconsin.


                                       40