ESCROW AGREEMENT

     ESCROW AGREEMENT ("Agreement") dated [Closing Date] by and among ARPEGGIO
ACQUISITION CORPORATION, a Delaware corporation ("Parent"), IRVIN E. RICHTER, AS
THE TARGET STOCKHOLDERS' REPRESENTATIVE, being the representative of the former
stockholders of HILL INTERNATIONAL, INC., a Delaware corporation (the
"Representative"), and CONTINENTAL STOCK TRANSFER & TRUST COMPANY, as escrow
agent (the "Escrow Agent").

     Parent, Hill International, Inc. ("Target") and the stockholders of Target
are the parties to an Agreement and Plan of Merger and Reorganization dated as
of December 5, 2005 (the "Merger Agreement") pursuant to which Hill has merged
with and into Parent. Pursuant to the Merger Agreement, Parent is to be
indemnified in certain respects. The parties desire to establish an escrow fund
as collateral security for the indemnification obligations under the Merger
Agreement. The Representative has been designated pursuant to the Merger
Agreement to represent all of the former stockholders of Target (the
"Stockholders") and each Permitted Transferee (as hereinafter defined) of the
Stockholders (the Stockholders and all such Permitted Transferees are
hereinafter referred to collectively as the "Owners"), and to act on their
behalf for purposes of this Agreement. Capitalized terms used herein that are
not otherwise defined herein shall have the meanings ascribed to them in the
Merger Agreement.

     The parties agree as follows:

          1. (a) Concurrently with the execution hereof, each of the
Stockholders is delivering to the Escrow Agent, to be held in escrow pursuant to
the terms of this Agreement, stock certificates issued in the name of such
Stockholder representing twelve percent (12%) of the total number of Base Shares
received by such Stockholder pursuant to the Merger Agreement, together with two
(2) assignments separate from certificate executed in blank by such Stockholder,
with medallion signature guaranties. Of such shares, five-sixths (the "Basic
Indemnity Shares") shall be available only with respect to satisfaction of
claims ("Basic Indemnity Claims") for indemnity arising other than pursuant to
Tax Indemnification Claims and one-sixth (the "Tax Indemnity Shares") shall be
available only with respect to satisfaction of Tax Indemnification Claims. The
shares of Parent Common Stock represented by the stock certificates so delivered
by the Stockholders to the Escrow Agent are herein referred to in the aggregate
as the "Escrow Fund." The Escrow Agent shall maintain a separate account for
each Stockholder's, and, subsequent to any transfer permitted pursuant to
Paragraph 1(e) hereof, each Owner's, portion of the Escrow Fund, separately
designated as to Basic Indemnity Shares and Tax Indemnity Shares.

               (b) The Escrow Agent hereby agrees to act as escrow agent and to
hold, safeguard and disburse the Escrow Fund pursuant to the terms and
conditions hereof. It shall treat the Escrow Fund as a trust fund in accordance
with the terms of this Agreement and not as the property of Parent. The Escrow
Agent's duties hereunder shall

terminate upon its distribution of the entire Escrow Fund in accordance with
this Agreement.

               (c) Except as herein provided, the Owners shall retain all of
their rights as stockholders of Parent with respect to shares of Parent Common
Stock constituting the Escrow Fund during the period the Escrow Fund is held by
the Escrow Agent (the "Escrow Period"), including, without limitation, the right
to vote their shares of Parent Common Stock included in the Escrow Fund.

               (d) During the Escrow Period, all dividends payable in cash with
respect to the shares of Parent Common Stock included in the Escrow Fund shall
be paid to the Owners, but all dividends payable in stock or other non-cash
property ("Non-Cash Dividends") shall be delivered to the Escrow Agent to hold
in accordance with the terms hereof. As used herein, the term "Escrow Fund"
shall be deemed to include the Non-Cash Dividends distributed thereon, if any.

               (e) During the Escrow Period, no sale, transfer or other
disposition may be made of any or all of the shares of Parent Common Stock in
the Escrow Fund except (i) to a "Permitted Transferee" (as hereinafter defined),
(ii) by virtue of the laws of descent and distribution upon death of any Owner,
or (iii) pursuant to a qualified domestic relations order; provided, however,
that such permissive transfers may be implemented only upon the respective
transferee's written agreement to be bound by the terms and conditions of this
Agreement. As used in this Agreement, the term "Permitted Transferee" shall
include: (x) members of a Stockholder's "Immediate Family" (as hereinafter
defined); (y) an entity in which (A) a Stockholder and/or members of a
Stockholder's Immediate Family beneficially own 100% of such entity's voting and
non-voting equity securities, or (B) a Stockholder and/or a member of such
Stockholder's Immediate Family is a general partner and in which such
Stockholder and/or members of such Stockholder's Immediate Family beneficially
own 100% of all capital accounts of such entity; and (z) a revocable trust
established by a Stockholder during his lifetime for the benefit of such
Stockholder or for the exclusive benefit of all or any of such Stockholder's
Immediate Family. As used in this Agreement, the term "Immediate Family" means,
with respect to any Stockholder, a spouse, parents, lineal descendants, the
spouse of any lineal descendant, and brothers and sisters (or a trust, all of
whose current beneficiaries are members of an Immediate Family of the
Stockholder). In connection with and as a condition to each permitted transfer,
the Permitted Transferee shall deliver to the Escrow Agent an assignment
separate from certificate executed by the transferring Stockholder, with
medallion signature guaranty, or where applicable, an order of a court of
competent jurisdiction, evidencing the transfer of shares to the Permitted
Transferee, together with two (2) assignments separate from certificate executed
in blank by the Permitted Transferee, with medallion signature guaranties, with
respect to the shares transferred to the Permitted Transferee. Upon receipt of
such documents, the Escrow Agent shall deliver to Parent's transfer agent the
original stock certificate out of which the assigned shares are to be
transferred, together with the executed assignment separate from certificate
executed by the transferring Stockholder, or a copy of the applicable court
order, and shall request that Parent issue new certificates representing (m) the
number of shares, if any, that continue to be owned by the transferring
Stockholder, and (n) the number of shares owned by the Permitted

                                        2

Transferee as the result of such transfer. Parent, the transferring Stockholder
and the Permitted Transferee shall cooperate in all respects with the Escrow
Agent in documenting each such transfer and in effectuating the result intended
to be accomplished thereby. During the Escrow Period, no Owner shall pledge or
grant a security interest in such Owner's shares of Parent Common Stock included
in the Escrow Fund or grant a security interest in such Owner's rights under
this Agreement.

          2. (a) Parent, acting through the current or former member or members
of Parent's Board of Directors who has or have been appointed by Parent to take
all necessary actions and make all decisions on behalf of Parent with respect to
its and Target's rights to indemnification under Article VII of the Merger
Agreement (the "Committee"), may make a claim for indemnification pursuant to
the Merger Agreement ("Indemnity Claim") against the Escrow Fund by giving
notice (a "Notice") to the Representative (with a copy to the Escrow Agent)
specifying (i) the covenant, representation, warranty, agreement, undertaking or
obligation contained in the Merger Agreement which it asserts has been breached
or otherwise entitles Parent or Target to indemnification, (ii) in reasonable
detail, the nature and dollar amount of any Indemnity Claim, (iii) whether the
Indemnity Claim is a Basic Indemnity Claim or a Tax Indemnity Claim, and (iv)
whether the Indemnity Claim results from a Third Party Claim against Parent or
Target. The Committee also shall deliver to the Escrow Agent (with a copy to the
Representative), concurrently with its delivery to the Escrow Agent of the
Notice, a certification as to the date on which the Notice was delivered to the
Representative.

               (b) If the Representative shall give a notice to the Committee
(with a copy to the Escrow Agent) (a "Counter Notice"), within 30 days following
the date of receipt (as specified in the Committee's certification) by the
Representative of a copy of the Notice, disputing whether the Indemnity Claim is
indemnifiable under the Merger Agreement, the Committee and the Representative
shall attempt to resolve such dispute by voluntary settlement as provided in
paragraph 2(c) below. If no Counter Notice with respect to an Indemnity Claim is
received by the Escrow Agent from the Representative within such 30-day period,
the Indemnity Claim shall be deemed to be an Established Claim (as hereinafter
defined) for purposes of this Agreement.

               (c) If the Representative delivers a Counter Notice to the Escrow
Agent, the Committee and the Representative shall, during the period of 60 days
following the delivery of such Counter Notice or such greater period of time as
the parties may agree to in writing (with a copy to the Escrow Agent), attempt
to resolve the dispute with respect to which the Counter Notice was given. If
the Committee and the Representative shall reach a settlement with respect to
any such dispute, they shall jointly deliver written notice of such settlement
to the Escrow Agent specifying the terms thereof. If the Committee and the
Representative shall be unable to reach a settlement with respect to a dispute,
such dispute shall be resolved by arbitration pursuant to paragraph 2(d) below.

               (d) If the Committee and the Representative cannot resolve a
dispute prior to expiration of the 60-day period referred to in paragraph 2(c)
above (or such longer period as the parties may have agreed to in writing), then
such dispute shall be

                                        3

submitted (and either party may submit such dispute) for arbitration before a
single arbitrator in New York, New York, in accordance with the commercial
arbitration rules of the American Arbitration Association then in effect and the
provisions of Section 10.12 of the Merger Agreement to the extent that such
provisions do not conflict with the provisions of this paragraph. The Committee
and the Representative shall attempt to agree upon an arbitrator; if they shall
be unable to agree upon an arbitrator within 10 days after the dispute is
submitted for arbitration, then either the Committee or the Representative, upon
written notice to the other, may apply for appointment of such arbitrator by the
American Arbitration Association. Each party shall pay the fees and expenses of
counsel used by it and 50% of the fees and expenses of the arbitrator and of
other expenses of the arbitration. The arbitrator shall render his decision
within 90 days after his appointment and may award costs to either the Committee
or the Representative if, in his sole opinion reasonably exercised, the claims
made by any other party had no reasonable basis and were arbitrary and
capricious. Such decision and award shall be in writing and shall be final and
conclusive on the parties, and counterpart copies thereof shall be delivered to
each of the parties. Judgment may be obtained on the decision of the arbitrator
so rendered in any federal or state court sitting in New York County, New York,
having jurisdiction, and may be enforced in accordance with the law of the State
of New York. If the arbitrator shall fail to render his decision or award within
such 90-day period, either the Committee or the Representative may apply to any
federal or state court sitting in New York County, New York, then having
jurisdiction, by action, proceeding or otherwise, as may be proper to determine
the matter in dispute consistently with the provisions of this Agreement. The
parties consent to the exclusive jurisdiction of the federal and state courts
sitting in New York County, New York, for this purpose. The prevailing party (or
either party, in the case of a decision or award rendered in part for each
party) shall send a copy of the arbitration decision or of any judgment of the
court to the Escrow Agent.

               (e) As used in this Agreement, "Established Claim" means any (i)
Indemnification Claim deemed established pursuant to the last sentence of
paragraph 2(b) above, (ii) Indemnification Claim resolved in favor of Parent or
Target by settlement pursuant to paragraph 2(c) above, resulting in a dollar
award to Parent or Target, (iii) Indemnification Claim established by the
decision of an arbitrator pursuant to paragraph 2(d) above, resulting in a
dollar award to Parent, (iv) Third Party Claim that has been sustained by a
final determination (after exhaustion of any appeals) of a court of competent
jurisdiction, or (v) Third Party Claim that the Committee and the Representative
have jointly notified the Escrow Agent has been settled in accordance with the
provisions of the Merger Agreement.

               (f) (i) Promptly after an Indemnity Claim becomes an Established
Claim, the Committee and the Representative shall jointly deliver a notice to
the Escrow Agent (a "Joint Notice") directing the Escrow Agent to pay to Parent,
and the Escrow Agent promptly shall pay to Parent, an amount equal to the
aggregate dollar amount of the Established Claim (or, if at such time there
remains in the Escrow Fund less than the full amount so payable, the full amount
remaining in the Escrow Fund).

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                    (ii) Payment of an Established Claim shall be made in shares
of Parent Common Stock that are either Basic Indemnity Shares or Tax Indemnity
Shares, as the case may be, pro rata from the account maintained on behalf of
each Owner. For purposes of each payment, such shares shall be valued at the
"Fair Market Value" (as defined below). However, in no event shall the Escrow
Agent be required to calculate Fair Market Value or make a determination of the
number of shares to be delivered to Parent in satisfaction of any Established
Claim; rather, such calculation shall be included in and made part of the Joint
Notice. The Escrow Agent shall transfer to Parent out of the Escrow Fund that
number of shares of Parent Common Stock necessary to satisfy each Established
Claim, as set out in the Joint Notice. Any dispute between the Committee and the
Representative concerning the calculation of Fair Market Value or the number of
shares necessary to satisfy any Established Claim, or any other dispute
regarding a Joint Notice, shall be resolved between the Committee and the
Representative in accordance with the procedures specified in paragraph 2(d)
above, and shall not involve the Escrow Agent. Each transfer of shares in
satisfaction of an Established Claim shall be made by the Escrow Agent
delivering to Parent one or more stock certificates held in each Owner's account
evidencing not less than such Owner's pro rata portion of the aggregate number
of shares specified in the Joint Notice, together with assignments separate from
certificate executed in blank by such Owner and completed by the Escrow Agent in
accordance with instructions included in the Joint Notice. Upon receipt of the
stock certificates and assignments, Parent shall deliver to the Escrow Agent new
certificates representing the number of shares owned by each Owner after such
payment. The parties hereto (other than the Escrow Agent) agree that the
foregoing right to make payments of Established Claims in shares of Parent
Common Stock may be made notwithstanding any other agreements restricting or
limiting the ability of any Owner to sell any shares of Parent stock or
otherwise. The Committee and the Representative shall be required to exercise
utmost good faith in all matters relating to the preparation and delivery of
each Joint Notice. As used herein, "Fair Market Value" means the average
reported closing price for the Parent Common Stock for the ten trading days
ending on the last trading day prior to the day the Established Claim is paid.

                    (iii) Notwithstanding anything herein to the contrary, at
such time as an Indemnification Claim has become an Established Claim, the
Representative shall have the right to substitute for the Escrow Shares that
otherwise would be paid in satisfaction of such claim (the "Claim Shares"), cash
in an amount equal to the Fair Market Value of the Claim Shares ("Substituted
Cash"). In such event (i) the Joint Notice shall include a statement describing
the substitution of Substituted Cash for the Claim Shares, and (ii)
substantially contemporaneously with the delivery of such Joint Notice, the
Representative shall cause currently available funds to be delivered to the
Escrow Agent in an amount equal to the Substituted Cash. Upon receipt of such
Joint Notice and Substituted Cash, the Escrow Agent shall (y) in payment of the
Established Claim described in the Joint Notice, deliver the Substituted Cash to
Parent in lieu of the Claim Shares, and (z) cause the Claim Shares to be
returned to the Representative.

          3. On the first Business Day after the Escrow Termination Date, upon
receipt of a Joint Notice, the Escrow Agent shall distribute and deliver to each
Owner certificates representing the shares of Parent Common Stock then in such
Owner's

                                        5

account in the Escrow Fund that are Basic Indemnity Shares, unless at such time
there are any Basic Indemnity Claims with respect to which Notices have been
received but which have not been resolved pursuant to Section 2 hereof or in
respect of which the Escrow Agent has not been notified of, and received a copy
of, a final determination (after exhaustion of any appeals) by a court of
competent jurisdiction, as the case may be (in either case, "Pending Claims"),
and which, if resolved or finally determined in favor of Parent, would result in
a payment to Parent, in which case the Escrow Agent shall retain, and the total
amount of such distributions to such Owner shall be reduced by, the "Pending
Claims Reserve" (as hereafter defined). The Committee shall certify to the
Escrow Agent the Fair Market Value to be used in calculating the Pending Claims
Reserve and the number of shares of Parent Common Stock to be retained therefor.
Thereafter, if any Pending Claim becomes an Established Claim, the Committee and
the Representative shall deliver to the Escrow Agent a Joint Notice directing
the Escrow Agent to pay to Parent an amount in respect thereof determined in
accordance with paragraph 2(f) above, and to deliver to each Owner shares of
Parent Common Stock then in such owner's account in the Escrow Fund having a
Fair Market Value equal to the amount by which the remaining portion of his
account in the Escrow Fund exceeds the then Pending Claims Reserve (determined
as set forth below), all as specified in a Joint Notice. If any Pending Claim is
resolved against Parent, the Committee and the Representative shall deliver to
the Escrow Agent a Joint Notice directing the Escrow Agent to pay to each Owner
the amount by which the remaining portion of his account in the Escrow Fund
exceeds the then Pending Claims Reserve. Upon resolution of all Pending Claims,
the Committee and the Representative shall deliver to the Escrow Agent a Joint
Notice directing the Escrow Agent shall pay to such Owner the remaining portion
of his or her account in the Escrow Fund.

          On the first Business Day after the Tax Escrow Termination Date, upon
receipt of a Joint Notice, the Escrow Agent shall distribute and deliver to each
Owner certificates representing the shares of Parent Common Stock then in such
Owner's account in the Escrow Fund that are Tax Indemnity Shares and any
remaining Basic Indemnity Shares, regardless of whether or not such Basic
Indemnity Shares are part of the Pending Claims Reserve.

          As used herein, the "Pending Claims Reserve" shall mean, at the time
any such determination is made, that number of shares of Parent Common Stock in
the Escrow Fund having a Fair Market Value equal to the sum of the aggregate
dollar amounts claimed to be due with respect to all Pending Claims (as shown in
the Notices of such Claims).

          4. The Escrow Agent, the Committee and the Representative shall
cooperate in all respects with one another in the calculation of any amounts
determined to be payable to Parent and the Owners in accordance with this
Agreement and in implementing the procedures necessary to effect such payments.

          5. (a) The Escrow Agent undertakes to perform only such duties as are
expressly set forth herein. It is understood that the Escrow Agent is not a
trustee or fiduciary and is acting hereunder merely in a ministerial capacity.

                                        6

               (b) The Escrow Agent shall not be liable for any action taken or
omitted by it in good faith and in the exercise of its own best judgment, and
may rely conclusively and shall be protected in acting upon any order, notice,
demand, certificate, opinion or advice of counsel (including counsel chosen by
the Escrow Agent), statement, instrument, report or other paper or document (not
only as to its due execution and the validity and effectiveness of its
provisions, but also as to the truth and acceptability of any information
therein contained) which is believed by the Escrow Agent to be genuine and to be
signed or presented by the proper person or persons. The Escrow Agent shall not
be bound by any notice or demand, or any waiver, modification, termination or
rescission of this Agreement unless evidenced by a writing delivered to the
Escrow Agent signed by the proper party or parties and, if the duties or rights
of the Escrow Agent are affected, unless it shall have given its prior written
consent thereto.

               (c) The Escrow Agent's sole responsibility upon receipt of any
notice requiring any payment to Parent pursuant to the terms of this Agreement
or, if such notice is disputed by the Committee or the Representative, the
settlement with respect to any such dispute, whether by virtue of joint
resolution, arbitration or determination of a court of competent jurisdiction,
is to pay to Parent the amount specified in such notice, and the Escrow Agent
shall have no duty to determine the validity, authenticity or enforceability of
any specification or certification made in such notice.

               (d) The Escrow Agent shall not be liable for any action taken by
it in good faith and believed by it to be authorized or within the rights or
powers conferred upon it by this Agreement, and may consult with counsel of its
own choice and shall have full and complete authorization and indemnification
under Section 5(g), below, for any action taken or suffered by it hereunder in
good faith and in accordance with the opinion of such counsel.

               (e) The Escrow Agent may resign at any time and be discharged
from its duties as escrow agent hereunder by its giving the other parties hereto
written notice and such resignation shall become effective as hereinafter
provided. Such resignation shall become effective at such time that the Escrow
Agent shall turn over the Escrow Fund to a successor escrow agent appointed
jointly by the Committee and the Representative. If no new escrow agent is so
appointed within the 60 day period following the giving of such notice of
resignation, the Escrow Agent may deposit the Escrow Fund with any court it
reasonably deems appropriate.

               (f) In the event of a dispute between the parties as to the
proper disposition of the Escrow Fund, the Escrow Agent shall be entitled (but
not required) to deliver the Escrow Fund into the United States District Court
for the Southern District of New York and, upon giving notice to the Committee
and the Representative of such action, shall thereupon be relieved of all
further responsibility and liability.

               (g) The Escrow Agent shall be indemnified and held harmless by
Parent from and against any expenses, including counsel fees and disbursements,
or loss suffered by the Escrow Agent in connection with any action, suit or
other proceeding

                                        7

involving any claim which in any way, directly or indirectly, arises out of or
relates to this Agreement, the services of the Escrow Agent hereunder, or the
Escrow Fund held by it hereunder, other than expenses or losses arising from the
gross negligence or willful misconduct of the Escrow Agent. Promptly after the
receipt by the Escrow Agent of notice of any demand or claim or the commencement
of any action, suit or proceeding, the Escrow Agent shall notify the other
parties hereto in writing. In the event of the receipt of such notice, the
Escrow Agent, in its sole discretion, may commence an action in the nature of
interpleader in an appropriate court to determine ownership or disposition of
the Escrow Fund or it may deposit the Escrow Fund with the clerk of any
appropriate court and be relieved of any liability with respect thereto or it
may retain the Escrow Fund pending receipt of a final, non-appealable order of a
court having jurisdiction over all of the parties hereto directing to whom and
under what circumstances the Escrow Fund are to be disbursed and delivered.

               (h) The Escrow Agent shall be entitled to reasonable compensation
from Parent for all services rendered by it hereunder. The Escrow Agent shall
also be entitled to reimbursement from Parent for all expenses paid or incurred
by it in the administration of its duties hereunder including, but not limited
to, all counsel, advisors' and agents' fees and disbursements and all taxes or
other governmental charges.

               (i) From time to time on and after the date hereof, the Committee
and the Representative shall deliver or cause to be delivered to the Escrow
Agent such further documents and instruments and shall do or cause to be done
such further acts as the Escrow Agent shall reasonably request to carry out more
effectively the provisions and purposes of this Agreement, to evidence
compliance herewith or to assure itself that it is protected in acting
hereunder.

               (j) Notwithstanding anything herein to the contrary, the Escrow
Agent shall not be relieved from liability hereunder for its own gross
negligence or its own willful misconduct.

          6. This Agreement expressly sets forth all the duties of the Escrow
Agent with respect to any and all matters pertinent hereto. No implied duties or
obligations shall be read into this Agreement against the Escrow Agent. The
Escrow Agent shall not be bound by the provisions of any agreement among the
parties hereto except this Agreement and shall have no duty to inquire into the
terms and conditions of any agreement made or entered into in connection with
this Agreement, including, without limitation, the Merger Agreement.

          7. This Agreement shall inure to the benefit of and be binding upon
the parties and their respective heirs, successors, assigns and legal
representatives, shall be governed by and construed in accordance with the law
of Delaware applicable to contracts made and to be performed therein except that
issues relating to the rights and obligations of the Escrow Agent shall be
governed by and construed in accordance with the law of New York applicable to
contracts made and to be performed therein. This Agreement cannot be changed or
terminated except by a writing signed by the Committee, the Representative and
the Escrow Agent.

                                        8

          8. The Committee and the Representative each hereby consents to the
exclusive jurisdiction of the federal and state courts sitting in New York
County, New York, with respect to any claim or controversy arising out of this
Agreement. Service of process in any action or proceeding brought against the
Committee or the Representative in respect of any such claim or controversy may
be made upon it by registered mail, postage prepaid, return receipt requested,
at the address specified in Section 9, with copies delivered by nationally
recognized overnight carrier to Graubard Miller, The Chrysler Building, 405
Lexington Avenue, New York, N.Y. 10174-1901, Attention: David Alan Miller, Esq.,
and to McCarter & English, LLP, 245 Park Avenue, 27th Floor, New York, N.Y.
10167, Attention: Peter S. Twombly, Esq.

          9. All notices and other communications under this Agreement shall be
in writing and shall be deemed given if given by hand or delivered by nationally
recognized overnight carrier, or if given by telecopier and confirmed by mail
(registered or certified mail, postage prepaid, return receipt requested), to
the respective parties as follows:

               A.   If to the Committee, to it at:

                    Eric Rosenfeld
                    10 East 53rd Street, 35th Floor
                    New York, New York 10022
                    Telecopier No.: 212-319-0760

                    with a copy to:

                    Graubard Miller
                    The Chrysler Building
                    405 Lexington Avenue
                    New York, New York 10174-1901
                    Attention: David Alan Miller, Esq.
                    Telecopier No.: 212-818-8881

               B.   If to the Representative, to him at:

                    Irvin E. Richter
                    Hill International, Inc.
                    303 Lippincott Centre
                    Marlton, New Jersey 08053
                    Telecopier No.: 856-810-1309

                    with a copy to:

                    McCarter & English, LLP
                    245 Park Avenue, 27th Floor
                    New York, New York 10167

                                        9

                    Attention: Peter S. Twombly, Esq.
                    Telecopier No.: 212-935-1773

               C.   If to the Escrow Agent, to it at:

                    Continental Stock Transfer & Trust Company
                    2 Broadway
                    New York, New York 10004
                    Attention: Steven G. Nelson
                    Telecopier No.: 212-509-5150

or to such other person or address as any of the parties hereto shall specify by
notice in writing to all the other parties hereto.

          10. (a) If this Agreement requires a party to deliver any notice or
other document, and such party refuses to do so, the matter shall be submitted
to arbitration pursuant to paragraph 2(d) of this Agreement.

               (b) All notices delivered to the Escrow Agent shall refer to the
provision of this Agreement under which such notice is being delivered and, if
applicable, shall clearly specify the aggregate dollar amount due and payable to
Parent.

               (c) This Agreement may be executed in any number of counterparts,
each of which shall be deemed to be an original instrument and all of which
together shall constitute a single agreement.

          IN WITNESS WHEREOF, each of the parties hereto has duly executed this
Agreement on the date first above written.

                       [Signatures are on following page]

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             [Signature Page to Escrow Agreement dated Closing Date]

                                            ARPEGGIO ACQUISITION CORPORATION

                                            By:
                                                --------------------------------
                                            Name:
                                            Title:

                                            THE REPRESENTATIVE

                                            ------------------------------------
                                                      Irvin E. Richter

                                            ESCROW AGENT

                                            CONTINENTAL STOCK TRANSFER &
                                               TRUST COMPANY

                                            By:
                                                --------------------------------
                                            Name: Steven G. Nelson
                                            Title: Chairman

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