Document:

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                                                                    EXHIBIT 10.2

                            FIRST AMENDMENT TO LEASE

      THIS FIRST AMENDMENT TO LEASE ("Amendment") is made and entered into as of
the 15th day of June, 2000, by and between COPLEY PLACE ASSOCIATES, LLC, a
Delaware limited liability company (the "Landlord"), and DIGITAS LLC, a
Massachusetts corporation (the "Tenant").

                                   WITNESSETH:

      WHEREAS, Landlord and Tenant entered into that certain lease dated as of
March 3, 2000 (the "Lease"), demising a portion of the Office Section described
in Exhibit A of the Lease (the "Premises") on the Fifth Floor of Four Copley
Place, located in Boston, Massachusetts (the "Building");

      WHEREAS, the Tenant has requested that it have certain rights to parking
and the Landlord has agreed to provide parking rights to the Tenant; and

      WHEREAS, the parties desire to amend the Lease to set forth the terms on
which Tenant shall be provided with the right to park automobiles in the garage
associated with the Office Section.

      NOW, THEREFORE, in consideration of the promises and the mutual covenants
and agreements herein contained, the receipt and sufficiency of which are hereby
acknowledged, the Landlord and Tenant hereby agree as follows:

      1. A new Paragraph 40 shall be added to the Lease and shall read in its
entirety as follows:

      40.   PARKING.

            Tenant shall have the right during the Term to use up to six (6)
      non-reserved parking spaces in the garage located within and serving the
      Property, subject to payment by Tenant for such use at the prevailing rate

                                       -1-
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      therefor charged by the operator of the garage from time to time. In the
      event of non-payment of parking charges due hereunder by the Tenant,
      Landlord shall have the right to terminate Tenant's rights with respect to
      parking without any obligation to reinstate such right to parking in the
      event Tenant attempts to resume payment for parking.

      2. Any term contained in this Amendment having an initial capital letter
and not otherwise defined herein shall have the meaning assigned to it in the
Lease (including Exhibits thereto).

      3. Landlord and Tenant hereby acknowledge to each other that the Lease, as
amended hereby, is and remains in full force and effect.

      IN WITNESS WHEREOF, Landlord and Tenant have caused this First Amendment
to be executed as of the date first above written.

                                    LANDLORD:

                                    COPLEY PLACE ASSOCIATES, LLC,
                                    a Delaware limited liability company

                                    By:  Overseas Management, Inc.,
                                         a Delaware corporation,
                                         Managing Agent

                                         By: /s/ Paul C. Grant
                                             --------------------------
                                             Paul C. Grant
                                             Its: V.P. & GM
                                                  ---------------------

                                    TENANT:

                                    DIGITAS LLC

                                    By: /s/ [ILLEGIBLE]
                                        -------------------------
                                        Its Manager
                                        Hereunto duly authorized

                                       -2-<PAGE>

                                                                    EXHIBIT 10.3

                            SECOND AMENDMENT TO LEASE

      THIS SECOND AMENDMENT TO LEASE is made and entered into as of the 6th day
of October, 2000 by and between COPLEY PLACE ASSOCIATES, LLC, a Delaware limited
liability company (the "Landlord"), and DIGITAS LLC (the "Tenant").

      Reference is made to the following:

      A. That certain lease dated as of March 3, 2000 by and between Landlord,
as the "Landlord" therein named, and Tenant, as the "Tenant" therein named as
amended by First Amendment to Lease dated June 15, 2000, (the "Lease"), relative
to premises consisting of approximately 23,554 rentable square feet of space on
the Fifth Floor of Four Copley Place, Boston, Suffolk County, Massachusetts (the
"Premises"); and

      B. Effective November 1, 2000, the size of the Premises shall increase
from that set forth in the Lease by reason of the addition thereto of the
Seventh Floor of Four Copley Place; and

      C. The parties now wish to amend the Lease as hereinafter set forth to
modify the Lease as to the area constituting the Premises as well as the Rent
and other provisions affected by the change in such area and to make certain
other changes to the Lease agreed upon by the Landlord and Tenant incident to
the change in the Premises.

      NOW, THEREFORE, in consideration of the mutual covenants and agreements
hereinafter set forth and other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, Landlord and Tenant hereby agree
as follows:

      1. As of the Effective Date, the Lease is hereby amended to extend the
Termination Date of the Lease to December 31, 2005, unless sooner terminated as
provided in the Lease.

      2. As of the Effective Date, the Premises shall be increased by the
addition thereto of 25,955 rentable square feet on the Seventh Floor of Four
Copley Place ("Space B") which shall be delivered to Tenant in an "As-Is"
Condition and accordingly the Lease is hereby amended, as of the Effective Date,
to increase the Premises by the addition of Space B so that the section
captioned "Premises" under Paragraph I of the Lease shall, as of the Effective
Date, read in its entirety as follows:

      Those portions of the Office Section designated on the plan attached
      hereto as Exhibit A and commonly described as approximately 23,554
      rentable square feet ("Space A"), consisting of a portion of the fifth
      floor of Four Copley Place, and

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      approximately 25,955 rentable square feet ("Space B"), consisting of a
      portion of the seventh floor of Four Copley Place. Excepted and excluded
      from the Premises are the roof or ceiling, the floor and all perimeter
      walls of the Premises, except the inner surfaces thereof, but the entry
      doors to the Premises are not excluded from the Premises and are a part
      thereof for all purposes; and Tenant agrees that Landlord shall have the
      right to place in the Premises (but in such manner as to reduce to a
      minimum interference with Tenant's use of the Premises) utility lines,
      pipes and the like, to serve premises other than the Premises, and to
      replace and maintain and repair such utility lines, pipes and the like,
      in, over and upon the Premises.

      3. From and after the Effective Date, Exhibit A to the Lease is amended by
adding thereto a floor plan of the seventh floor of Four Copley Place showing
the portion of the Premises added thereto as of the Effective Date.

      4. With respect to periods from and after the Effective Date, Paragraph 1
of the Lease is hereby amended by deleting the section thereof captioned "Base
Rent", and substituting the following words and figures therefor:

      "Base Rent: From the Effective Date, (i) with respect to Space A, through
                                  December 31, 2000, at the rate of Eight
                                  Hundred Twenty-Four Thousand Three Hundred
                                  Ninety and no/100 Dollars ($824,390.00) per
                                  annum, in equal monthly installments of
                                  Sixty-Eight Thousand Six Hundred Ninety-Nine
                                  and 17/100 Dollars ($68,699.17) (computed on
                                  the basis of $35.00 per rentable square foot
                                  per annum at 23,554 rentable square feet of
                                  space); and from January 1, 2001 through
                                  February 28, 2002, at the rate of Nine Hundred
                                  Forty-Two Thousand One Hundred Sixty and
                                  no/100 Dollars ($942,160.00) per annum, in
                                  equal monthly installments of Seventy-Eight
                                  Thousand Five Hundred Thirteen and 3 3/100
                                  Dollars ($78,513.33) (computed on the basis of
                                  $40.00 per rentable square foot per annum at
                                  23,554 rentable square feet of space); plus
                                  with respect to Space B, through February 28,
                                  2002, at the rate of One Million Five Hundred
                                  Fifty-Seven Thousand Three Hundred and no/100
                                  Dollars ($1,557,300.00), in equal monthly
                                  installments of One Hundred Twenty-Nine
                                  Thousand Seven Hundred Seventy Five and no/100
                                  Dollars ($129,775.00) (computed on the basis
                                  of $60.00 per rentable square foot per

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                                  annum at 25,955 rentable square feet of
                                  space); and, as to the entire Premises, from
                                  March 1,2002 through the Termination Date, at
                                  the rate of Two Million Nine Hundred Seventy
                                  Thousand Five Hundred Forty and no/100 Dollars
                                  ($2,970,540.00) per annum, in equal monthly
                                  installments of Two Hundred Forty-Seven
                                  Thousand Five Hundred Forty-Five and no/100
                                  Dollars ($247,545.00) (computed on the basis
                                  of $60.00 per rentable square foot per annum
                                  at 49,509 rentable square feet of space)(See
                                  Paragraph 4)"

      5. Paragraph 1 of the Lease is hereby amended by deleting the section
thereof captioned "Tenant's Proportionate Share", and substituting the following
words and figures therefor:

      "Tenant's Proportionate     With respect to the portion of the Term
      Share:                      through October 31, 2000, 2.93416% (computed
                                  on the basis of 95% occupancy), and from
                                  November 1, 2000 through the Termination Date,
                                  6.16742% (computed on the basis of 95%
                                  occupancy)."

      6. Paragraph 1 of the Lease is hereby amended by deleting the section
thereof captioned "Security Deposit", and substituting the following therefor:

      Security Deposit: $2,000,000.00. At Tenant's option, the requirement to
                                  provide a security deposit in the amount
                                  specified may be satisfied by Tenant's
                                  depositing with Landlord a letter of credit in
                                  the amount of the Security Deposit issued by
                                  such banking institution of sufficient
                                  financial standing (as Landlord shall
                                  reasonably determine) having an office in
                                  Boston, Massachusetts against which such
                                  letter of credit may be drawn. The letter of
                                  credit shall be unconditional, irrevocable and
                                  in favor of Landlord, its successors or
                                  assigns, and shall provide that it may be
                                  drawn upon "at sight" upon presentation by
                                  Landlord to the issuer of only a statement
                                  certified by Landlord to the effect that
                                  Tenant is in default under its Lease with
                                  Landlord or that Landlord is otherwise
                                  entitled to draw thereunder pursuant to the
                                  terms and conditions of this Lease. The letter
                                  of credit shall provide that it shall remain
                                  in force for a period beginning on the
                                  Commencement Date and ending January 31, 2006,
                                  or for a lesser period

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                                  provided any letter of credit expiring prior
                                  to January 31, 2006, shall be replaced not
                                  later than thirty (30) days prior to its
                                  expiration by a letter of credit on all of the
                                  terms otherwise required hereunder and the
                                  failure timely to replace such letter of
                                  credit shall be a default with respect to
                                  which Landlord shall have the right to draw
                                  the full amount of the letter of credit and
                                  retain the same as a cash security deposit
                                  under Paragraph 27 of this Lease.

      7. Paragraph 40 of the Lease is hereby amended by deleting the same in its
entirety and inserting the following in lieu thereof

      40.   PARKING.

            Tenant shall have the right during the Term to use up to twelve (12)
      non-reserved parking spaces, six (6) of which shall be located in the
      garage located within and serving the Property, and all or a portion of
      the remainder of which may, at Landlord's option, be located in such
      garage or in the Dartmouth Street Garage in the property adjacent to the
      Building and located on Dartmouth Street, subject to payment by Tenant for
      such use at the prevailing rate therefor charged by the respective
      operators of such garages from time to time. In the event of non-payment
      of parking charges due hereunder by the Tenant, Landlord shall have the
      right to terminate Tenant's rights with respect to parking without any
      obligation to reinstate such right to parking in the event Tenant attempts
      to resume payment for parking.

      8. Any term contained in this Second Amendment to Lease having an initial
capital letter and not otherwise herein defined shall have the meaning assigned
to it in the Lease.

      9. The Lease, as hereby amended, is ratified and confirmed and remains in
full force and effect.

      IN WITNESS WHEREOF, Landlord and Tenant have caused this document to be
executed as of the date first above written.

                                    LANDLORD:

                                    COPLEY PLACE ASSOCIATES, LLC,
                                    a Delaware limited liability company

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                                    By:  Overseas Management, Inc.,
                                         a Delaware corporation,
                                         Managing Agent

                                         By: /s/ Paul C. Grant
                                             Paul C. Grant
                                             Its Vice President and
                                             General Manager

                                    TENANT:

                                    DIGITAS LLC

                                    By: /s/ Gregory Zais
                                        Its Vice President Real Estate
                                        Hereunto duly authorized

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