EXHIBIT 1
                                                                       ---------


                                                     September    , 2002

National Penn Bancshares, Inc.
Philadelphia and Reading Avenues
Boyertown, Pennsylvania 19512

Ladies and Gentlemen:

         National  Penn  Bancshares,   Inc.   ("NPB")  and   FirstService   Bank
("FirstService")  are considering  entering into an Agreement and Plan of Merger
dated September __, 2002 (the "Agreement").

         Pursuant  to the  proposed  Agreement,  and  subject  to the  terms and
conditions set forth therein:  (a) NPB will acquire  FirstService by a merger of
FirstService with and into National Penn Bank, a wholly-owned subsidiary of NPB;
(b)  shareholders  of  FirstService  will receive shares of NPB common stock and
cash in exchange  for their  shares of  FirstService  common  stock owned on the
closing date; and (c)  optionholders of FirstService  will receive stock options
exercisable  for common  stock of NPB in exchange  for options  exercisable  for
common stock of  FirstService  outstanding  on the closing date (the  foregoing,
collectively, the "Merger").

         I have  been  advised  that I may be  deemed  to be an  "affiliate"  of
FirstService for purposes of certain rules issued by the Securities and Exchange
Commission (the "SEC") under the Securities Act of 1933.

         I understand that NPB is requiring, as a condition to its execution and
delivery to  FirstService  of the  Agreement,  that I execute and deliver to NPB
this Letter Agreement.

         Intending to be legally bound hereby, I irrevocably agree and represent
as follows:

         1. I agree to vote or cause to be voted for  approval of the Merger all
shares of FirstService  common stock over which I exercise sole or shared voting
power.

         2. Through the conclusion of the meeting of  FirstService  shareholders
to vote upon the  Merger,  I agree not to offer,  sell,  transfer  or  otherwise
dispose of, or to permit the offer, sale,  transfer or other disposition of, any
shares of FirstService  common



National Penn Bancshares, Inc.
September    , 2002
Page 2


stock over which I exercise  sole or shared voting  power.  Notwithstanding  the
foregoing,  to the extent that I hold options to acquire shares of  FirstService
common stock, which options are transferable by their terms, I may make gifts of
such options to charitable organizations.

         3. I have  sole or shared  voting  power  over the  number of shares of
FirstService  common  stock,  and hold stock options for the number of shares of
FirstService  common stock,  if any, set forth below opposite my signature line.
NPB recognizes that with respect to any such shares which have been pledged to a
third  party,  I will not be able to control the voting or  disposition  of such
shares in the event of a default.

         4. I hereby  waive  the  right to assert  dissenters  rights  under the
National  Bank Act,  as  amended,  the  Pennsylvania  Banking  Code of 1965,  as
amended, and the Pennsylvania  Business Corporation Law of 1988, as amended, and
any other applicable law or regulation.

         5. I agree not to offer,  sell,  transfer or  otherwise  dispose of any
shares of NPB common stock received pursuant to the Merger, except:

         (a) at such time as a registration  statement  under the Securities Act
of 1933, as amended ("Securities Act"),  covering sales of such NPB common stock
is effective and a prospectus is made available under the Securities Act;

         (b) within the limits, and in accordance with the applicable
provisions of, Rule 145 under the Securities Act ("Rule 145"); or

         (c) in a transaction  which,  in an opinion of counsel  satisfactory to
NPB or as described in a "no-action"  or  interpretive  letter from the staff of
the SEC, is not required to be registered under the Securities Act;

and I  acknowledge  and agree that NPB is under no  obligation  to register  the
sale,  transfer or other  disposition of NPB common stock by me or on my behalf,
or to take any other action  necessary to make an  exemption  from  registration
available.


National Penn Bancshares, Inc.
September    , 2002
Page 3

         6.  NPB  shall  take  all  steps  necessary  to  ensure  that NPB is in
compliance  with all those  requirements of Rule 145 and Rule 144 with which NPB
must comply in order for the resale provisions of Rule 145(d) to be available to
me.

         7. I agree  that  neither  FirstService  nor NPB  shall be bound by any
attempted sale of any shares of  FirstService  common stock or NPB common stock,
respectively,  and  FirstService's  and  NPB's  transfer  agents  shall be given
appropriate  stop transfer orders and shall not be required to register any such
attempted  sale,  unless the sale has been effected in compliance with the terms
of this Letter Agreement;  and I further agree that the certificate representing
shares of NPB common stock owned by me may be endorsed with a restrictive legend
consistent with the terms of this Letter Agreement.

         8. I represent that I have no present plan or intention to offer, sell,
exchange,  or otherwise dispose of any shares of NPB common stock to be received
in the Merger.

         9. I agree, if I am an optionholder,  to exchange my options to acquire
shares of common stock of FirstService  for fully vested options to acquire such
number of shares of common  stock of NPB as is  provided in the  Agreement,  and
otherwise on the same terms and conditions as the exchanged FirstService options
(unless I shall have exercised any such option prior to the Merger).

         10. I  represent  that I have the  capacity  to enter into this  Letter
Agreement and that it is a valid and binding obligation  enforceable  against me
in accordance with its terms,  subject to bankruptcy,  insolvency and other laws
affecting creditors' rights and general equitable principles.

         I am signing this Letter  Agreement in my capacity as a shareholder  of
FirstService,  and as an  optionholder if I am an  optionholder,  and not in any
other capacity (including as a director).

         This Letter Agreement shall be effective upon acceptance by NPB.


National Penn Bancshares, Inc.
September    , 2002
Page 4


         This  Letter   Agreement   shall  terminate   concurrently   with,  and
automatically  upon,  any  termination  of the Agreement in accordance  with its
terms,  except that any such  termination  shall be without  prejudice  to NPB's
rights  arising out of any  willful  breach of any  covenant  or  representation
contained herein.

                                              Very truly yours,
Number of Shares,
and Shares Subject
to Stock Options,
Held:


- ----------------------------------            ----------------------------------
                                              [Name]
Accepted:
- ---------

NATIONAL PENN BANCSHARES, INC.


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