Document:

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                                                                     Exhibit 4.1

                                 Mainspring(R)

Number                                                               Shares
MSPR

                        Mainspring Communications, Inc.

             INCORPORATED UNDER THE LAWS OF THE STATE OF DELAWARE

                                 COMMON STOCK

                                                               SEE REVERSE FOR
                                                             CERTAIN DEFINITIONS

THIS CERTIFIES THAT                                           CUSIP 56062U 10 0

is the owner of

      FULLY PAID AND NON-ASSESSABLE SHARES OF THE PAR VALUE OF $.01 EACH
                            OF THE COMMON STOCK OF

Mainspring Communications, Inc. transferable upon the books of the Corporation
in person or by attorney upon surrender of this certificate duly endorsed or
assigned. This certificate and the shares represented hereby are subject to the
laws of the State of Delaware and to the Certificate of Incorporation and
By-laws of the Corporation as from time to time amended.
     This certificate is not valid until countersigned by the Transfer Agent and
registered by the Registrar.
     IN WITNESS WHEREOF, Mainspring Communications, Inc. has caused its
facsimile corporate seal and the facsimile signatures of its duly authorized
officers to be hereunto affixed.

Dated:

/s/ Mark A. Verdi                          John M. Connolly
--------------------------------           ----------------------------------
CHIEF FINANCIAL OFFICER AND TREASURER      PRESIDENT AND CHIEF EXECUTIVE OFFICER

COUNTERSIGNED AND REGISTERED
                   CHASEMELLON SHAREHOLDER SERVICES, L.L.C.
                                                                  TRANSFER AGENT
                                                                   AND REGISTRAR
BY
                                                            AUTHORIZED SIGNATURE

                                    [SEAL]
<PAGE>

THE CORPORATION IS AUTHORIZED TO ISSUE MORE THAN ONE CLASS OR SERIES OF STOCK.
A COPY OF THE PREFERENCES, POWERS, QUALIFICATIONS AND RIGHTS OF EACH CLASS AND
SERIES WILL BE FURNISHED BY THE CORPORATION UPON WRITTEN REQUEST AND WITHOUT
CHARGE.

     The following abbreviations, when used in the inscription on the face of
this certificate, shall be construed as though they were written out in full
according to applicable laws or regulations:

TEN COM -as tenants in common
TEN ENT -as tenants by the entireties
JT TEN  -as joint tenants with right of
            survivorship and not as tenants
            in common

UNIF GIFT MIN ACT-_________Custodian_________
                   (Cust)            (Minor)
                 under Uniform Gifts to Minors
                 Act__________________
                         (State)

    Additional abbreviations may also be used though not in the above list.

For value received________________________hereby sell, assign and transfer unto

PLEASE INSERT SOCIAL SECURITY OR OTHER
IDENTIFYING NUMBER OF ASSIGNEE
---------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
            PLEASE PRINT OR TYPEWRITE NAME AND ADDRESS OF ASSIGNEE

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                                                                       Shares
----------------------------------------------------------------------
of the capital stock represented by the within Certificate, and do hereby
irrevocably constitute and appoint
                                                                       Attorney
----------------------------------------------------------------------
to transfer the said stock on the books of the within-named Corporation with
full power of substitution in the premises.

Dated,
      ----------------------------------

                             ---------------------------------------------------
                             NOTICE: THE SIGNATURE TO THIS ASSIGNMENT MUST
                             CORRESPOND WITH THE NAME AS WRITTEN UPON THE FACE
                             OF THE CERTIFICATE IN EVERY PARTICULAR WITHOUT
                             ALTERATION OR ENLARGEMENT OR ANY CHANGE WHATEVER

Signature(s) Guaranteed

----------------------------------------------------
THE SIGNATURE(S) SHOULD BE GUARANTEED BY AN ELIGIBLE
GUARANTOR INSTITUTION (BANKS, STOCKBROKERS, SAVINGS
AND LOAN ASSOCIATIONS AND CREDIT UNIONS WITH
MEMBERSHIP IN AN APPROVED SIGNATURE GUARANTEE
MEDALLION PROGRAM), PURSUANT TO S.E.C. RULE 17Ad-15.<PAGE>

                                                                   EXHIBIT 10.14

THIS NOTE HAS NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED,
OR APPLICABLE STATE SECURITIES LAWS.  THIS NOTE MAY NOT BE SOLD, OFFERED FOR
SALE, PLEDGED OR HYPOTHECATED IN THE ABSENCE OF AN EFFECTIVE REGISTRATION
STATEMENT AS TO THIS NOTE UNDER SAID ACT AND APPLICABLE STATE SECURITIES LAWS.

                         FULL RECOURSE PROMISSORY NOTE

$225,000.00                                                       March 15, 2000

     FOR VALUE RECEIVED, Michael J. Armano, who resides at 24 Tyler Road, North
Andover, MA 01845, ("Borrower") promises to pay to the order of Mainspring
                     --------
Communications, Inc. ("Lender"), the principal sum of Two Hundred Twenty Five
                       ------
Thousand Dollars ($225,000.00) plus interest in arrears from and including the
date hereof on the principal balance from time to time outstanding, computed
daily, at a rate per annum of 8.75%.

     Borrower agrees to make principal and interest payments on this Note as
described in Exhibit A.  In the event Borrower voluntarily leaves the employment
             ---------
of Lender prior to the repayment in full of this Note, Borrower shall have
thirty days from the date of termination to repay the remaining principal
balance of the Note plus accrued and unpaid interest.

     Lender shall have full recourse against Borrower personally for collection
and payment of the debt evidenced by this Note.

     No delay or omission on the part of Lender in exercising any right
hereunder shall operate as a waiver of such right or of any other right of
Lender, nor shall any delay, omission or waiver on any one occasion be deemed a
bar to or waiver of the same or any other right on any future occasion.

     This Note may be prepaid at any time, in whole or in part, by Borrower
without premium or penalty.

     Borrower hereby waives presentment, demand, protest, and notice of every
kind.  Borrower shall pay on demand all costs, including court costs and
reasonable attorneys' fees, paid or incurred by Lender in enforcing this Note
upon default.

     This Note shall be governed by and construed in accordance with the laws of
the Commonwealth of Massachusetts.

                                       1

<PAGE>

     IN WITNESS WHEREOF, the parties have caused this Note to be signed under
seal, as of the date first above written.

                                    BORROWER:

                                    /s/ Michael J. Armano
                                    ---------------------
                                    Michael J. Armano

                                    LENDER:

                                    Mainspring Communications, Inc.

                                    By: /s/ Mark A. Verdi
                                       ------------------
                                       Mark A. Verdi
                                       Sr. Vice President, Finance and
                                       Operations

                                       2

<PAGE>

                                                                       Exhibit A
                                                                       ---------

                              Repayment Schedule

1. So long as the Borrower has remained in continuous employment with Mainspring
   from the date of this Note through March 15, 2001, Mainspring will forgive
   all accrued interest through March 15, 2001.

2. So long as the Borrower has remained in continuous employment with Mainspring
   from March 15, 2001 through March 15, 2002, Mainspring will forgive all
   accrued interest through March 15, 2002.

3. The principal balance of Two Hundred Twenty Five Thousand Dollars ($225,000)
   will be due and payable on March 15, 2002.

                                       3<PAGE>

                                 EXHIBIT 4(m)

                                AMENDMENT NO. 2
                                      TO
                        AMERICAN DENTAL PARTNERS, INC.
                       1997 EMPLOYEE STOCK PURCHASE PLAN
                       ---------------------------------

     The American Dental Partners, Inc. 1997 Employee Stock Purchase Plan, as
previously amended by Amendment No. 1 dated February 27, 1998 (collectively, the
"Plan"), is hereby amended pursuant to the following provisions:

     1.  Definitions
         -----------

     All capitalized terms used in this amendment which are not otherwise
defined herein shall have the respective meanings given such terms in the Plan.

     2.  Shares Subject To Plan
         ----------------------

     The maximum aggregate number of shares reserved and available for issuance
under the Plan, as provided in (S)3 of the Plan, is increased by 200,000 Shares
to a total of 400,000 Shares.

     3.  Effective Date; Construction
         ----------------------------

     The effective date of this amendment is February 25, 2000, and this
amendment shall be deemed to be a part of the Plan as of such date.  In the
event of any inconsistencies between the provisions of the Plan and this
amendment, the provisions of this amendment shall control.  Except as modified
by this amendment, the Plan shall continue in full force and effect without
change.

     This amendment shall be submitted to the stockholders of the Company for
approval as soon as reasonably practicable, but in any event not later than 12
months after the date of this amendment. Notwithstanding the preceding paragraph
or any other provisions of this amendment to the contrary, if this amendment is
not approved by the stockholders of the Company within such 12-month period,
this amendment shall automatically become null and void and have no further
force or effect.

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