HUDSON UNITED BANCORP
424B3, 1999-10-21
STATE COMMERCIAL BANKS
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         JeffBanks, Inc.                              Hudson United Bancorp

               WE ARE SOLICITING NEW PROXIES FOR YOUR VOTE ON THE
          JEFFBANKS- HUDSON UNITED MERGER - YOUR VOTE IS VERY IMPORTANT


         On August  13,  1999,  we mailed you a meeting  notice and joint  proxy
statement-prospectus  for special meetings of shareholders to vote on the merger
of JeffBanks,  Inc. into Hudson United  Bancorp.  The Hudson United  meeting was
scheduled  for  September  30, 1999.  The  JeffBanks  meeting was  scheduled for
October 1, 1999. As explained  below,  each of the meetings was  adjourned.  The
adjourned meetings will be reconvened as follows:

         The  JeffBanks  Meeting 9:00 a.m.,  November  15, 1999 The  Rittenhouse
         Hotel 210 West Rittenhouse Square Philadelphia,  Pennsylvania 19103

         The Hudson United Meeting 9:00 a.m., November  15,  1999 The  Sheraton
         Crossroads Route 17 North Mahwah, New Jersey 07495

         On September 15, 1999, Hudson United announced that it has entered into
a merger  agreement with Dime Bancorp,  Inc. The  transaction is structured as a
"merger of equals."  Dime is to be the surviving  corporation  with the new name
"Dime  United  Bancorp,  Inc." Each share of Hudson  United  common  stock is to
become one share of Dime United common stock and each share of Dime common stock
is to become 0.585 shares of Dime United common stock.

         The Hudson  United - JeffBanks  merger  agreement  calls for  JeffBanks
shareholders to receive 0.95 shares of Hudson United common stock for each share
of JeffBanks  common stock. If the Dime merger is completed,  each Hudson United
share,  including  those issued in the Hudson  United - JeffBanks  merger,  will
become  one  share of Dime  United  common  stock.  Thus,  if both  mergers  are
completed,  you will  then own 0.95  shares  of Dime  United  for each  share of
JeffBanks common stock you now own.

         We  adjourned  our  meetings  so that we  could  prepare  and  send you
additional  information on this new  development  and give you an opportunity to
consider it before voting on the Hudson United - JeffBanks  merger. We encourage
you to read the supplemented proxy statement-prospectus carefully before voting.

         Because  of  the  importance  of  the  information   contained  in  the
supplement,  we have decided to solicit new proxies for the meeting.  Thus, even
if you  previously  voted by proxy and do not wish to change your vote, you must
send in a new proxy card for your vote to be counted.

         Hudson  United  common  stock is listed on the New York Stock  Exchange
under the symbol "HU." Based on October 12, 1999 closing prices,  0.95 shares of
Hudson  United  common  stock had a value of $27.55.  Dime is listed on the NYSE
under the  symbol  "DME." It is  expected  that Dime  United  stock will also be
NYSE-listed.

         Both the  JeffBanks - Hudson United merger and the Hudson United - Dime
merger are structured so that  shareholders will not be taxed on the exchange of
their stock. The JeffBanks and Hudson United Boards of Directors each recommends
that its  shareholders  vote "FOR"  approval of the  JeffBanks  - Hudson  United
merger. Your vote is very important.  Please take the time to complete,  execute
and return the new yellow  (JeffBanks) or blue (Hudson United) proxy card in the
envelope provided.




Betsy Z. Cohen                              Kenneth T. Neilson
Chairman and Chief Executive Officer        Chairman and Chief Executive Officer
JeffBanks, Inc.                             Hudson United Bancorp



<PAGE>



Neither the Securities and Exchange Commission,  nor any bank regulatory agency,
nor any  state  securities  commission  has  approved  or  disapproved  of these
securities  or determined  if the  prospectus or this  supplement is truthful or
complete. Any representation to the contrary is a criminal offense.

     This is a supplement dated October 13, 1999 to the attached joint proxy
       statement-prospectus dated August 13, 1999. This supplement and the
               accompanying proxy cards are first being mailed to
          JeffBanks and Hudson United shareholders on October 14, 1999.


<PAGE>


                                 JeffBanks, Inc.
                               1845 Walnut Street
                        Philadelphia, Pennsylvania 19103

            Notice of Reconvening of Special Meeting of Shareholders
                          Adjourned on October 1, 1999
                    and being reconvened on November 15, 1999


To the Shareholders of JeffBanks, Inc.:

         Notice is hereby  given that the  special  meeting of  shareholders  of
JeffBanks,  Inc.,  which was adjourned on October 1, 1999, will be reconvened at
The Rittenhouse Hotel, 210 West Rittenhouse Square,  Philadelphia,  Pennsylvania
19103 at 9:00 a.m. on November 15, 1999.  The following are the purposes for the
special meeting:

                  (1)      To consider  and vote upon an  Agreement  and Plan of
                           Merger dated as of June 28, 1999, among Hudson United
                           Bancorp,   Hudson  United  Bank,   JeffBanks,   Inc.,
                           Jefferson  Bank  and  Jefferson  Bank of New  Jersey,
                           pursuant  to which  JeffBanks,  Inc.  will merge into
                           Hudson United Bancorp.

                  (2)      To transact  other  business  that may properly  come
                           before  the  special  meeting or any  adjournment  or
                           postponement of the special meeting.

         The record date for the  special  meeting  has not been  changed.  Only
shareholders  of record at the close of business on August 10, 1999 are entitled
to receive notice of and to vote at the special  meeting or any  adjournments or
postponements of the special meeting.

         The  JeffBanks   Board  of  Directors   unanimously   recommends   that
shareholders vote "FOR" approval of the merger.



                                      By Order of the Board of Directors,


                                      Betsy Z. Cohen
                                      Chairman and Chief Executive Officer


<PAGE>




                              Hudson United Bancorp
                            1000 MacArthur Boulevard
                            Mahwah, New Jersey 07430

            Notice of Reconvening of Special Meeting of Shareholders
                         Adjourned on September 30, 1999
                    and being reconvened on November 15, 1999


To the Shareholders of Hudson United Bancorp:

         Notice is hereby  given that the  special  meeting of  shareholders  of
Hudson  United  Bancorp  which  was  adjourned  on  September  30,  1999 will be
reconvened at The Sheraton Crossroads,  Route 17 North, Mahwah, New Jersey 07495
at 9:00 a.m. on November  15,  1999.  The  following  are the  purposes  for the
special meeting:

                  (1)      To consider  and vote upon an  Agreement  and Plan of
                           Merger dated as of June 28, 1999, among Hudson United
                           Bancorp,   Hudson  United  Bank,   JeffBanks,   Inc.,
                           Jefferson  Bank  and  Jefferson  Bank of New  Jersey,
                           pursuant  to which  JeffBanks,  Inc.  will merge into
                           Hudson United Bancorp.

                  (2)      To transact  other  business  that may properly  come
                           before  the  special  meeting or any  adjournment  or
                           postponement of the special meeting.

         The record date for the  special  meeting  has not been  changed.  Only
shareholders  of record at 3:00 p.m. on August 13, 1999 are  entitled to receive
notice  of  and  to  vote  at  the  special  meeting  or  any   adjournments  or
postponements of the special meeting.

         The Hudson  United  Bancorp Board of Directors  unanimously  recommends
that shareholders vote "FOR" approval of the merger.



                                           By Order of the Board of Directors,


                                           Kenneth T. Neilson
                                           Chairman and Chief Executive Officer


<PAGE>


         This  document is a supplement to the proxy  statement-prospectus  that
was mailed to you on August 13, 1999. It should be read in conjunction  with the
proxy  statement-prospectus,  which is attached.  Information in this supplement
that   differs  from  or  adds  to  what  was  in  the  August  13,  1999  proxy
statement-prospectus should be considered an amendment to the original document.


                              QUESTIONS AND ANSWERS

Q:       Why did you adjourn the JeffBanks and Hudson United special meetings?

A:       On  September  15, 1999 Hudson  United  announced an agreement to merge
         with Dime  Bancorp,  Inc. We  adjourned  the  meetings so that we could
         prepare and send you the information contained in this supplement,  and
         give you an opportunity to consider the additional information, as well
         as information  which is incorporated by reference into this supplement
         and the proxy statement-prospectus,  before you vote on the JeffBanks -
         Hudson United merger.

Q:       How is the Hudson  United - Dime  merger  structured,  and how will the
         combined entity be managed?

A:       The  transaction  is structured as a "merger of equals."  Hudson United
         will merge into Dime, with Dime as the surviving  corporation.  The new
         name of the merged entity will be Dime United  Bancorp,  Inc. The Board
         of  Directors  of Dime United  initially is to be composed of 13 former
         Dime  directors  and 12 former  Hudson  directors.  Lawrence  J.  Toal,
         currently  the  Chairman  and CEO of  Dime,  is to  serve  in the  same
         capacity  for Dime United  until his  retirement  on December 31, 2002.
         Kenneth T. Neilson, currently the Chairman and CEO of Hudson United, is
         to serve as President  and COO of Dime United until  December 31, 2002,
         and then he is to become Dime United's Chairman and CEO.

Q:       What is the exchange ratio in the proposed Hudson United - Dime merger?

A:       Upon completion of the merger, each share of Hudson United common stock
         will  automatically  become one share of common  stock in Dime  United.
         Each share of Dime common stock will become 0.585 shares of Dime United
         common stock in the merger. The Dime United common stock is expected to
         be listed on the NYSE.

         On September 14, 1999, the day before announcement of the Hudson United
         - Dime  agreement,  the closing  price of Hudson United common stock on
         the NYSE was $30-1/8 and the closing  price of Dime common stock on the
         NYSE was  $17-3/4.  On October 12,  1999,  the closing  price of Hudson
         United  common  stock was $29.00 and the  closing  price of Dime common
         stock was $16.50.

Q:       Will the  Hudson  United - Dime  merger be  tax-free  to Hudson  United
         shareholders?

A:       Yes. The merger is structured so that Hudson United  shareholders  will
         not generally  recognize federal income tax gain or loss upon receiving
         Dime United common stock in the merger.

Q:       Can you provide some basic information about Dime Bancorp?

A:       Dime Bancorp,  Inc. is a savings and loan holding company  incorporated
         in Delaware,  and  headquartered  in New York City. Dime is the holding
         company   for  The   Dime   Savings   Bank   of  New   York,   FSB,   a
         federally-chartered  savings  bank.  The  principal  subsidiary of Dime
         Savings Bank is North American  Mortgage  Company,  a mortgage  banking
         company  that was acquired by Dime in October  1997.  At June 30, 1999,
         Dime operated 100 banking branches  located  throughout the greater New
         York City  metropolitan  area.  Directly  and  through  North  American
         Mortgage Company,  Dime also provides consumer  financial  services and
         mortgage  banking  services  throughout the United States.  At June 30,
         1999,  Dime had assets of $21.4 billion,  deposits of $13.4 billion and
         stockholders' equity of $1.5 billion.  Dime is currently in the process
         of acquiring 28 branches of Key Bank, N.A. on Long Island, New York.

         Dime common  stock is traded on the New York Stock  Exchange  under the
         symbol "DME." The following table presents,  for the periods indicated,
         the high and low closing prices per share of Dime common stock.

<PAGE>

<TABLE>
<CAPTION>

                                            1997                  1998                     1999
                                            ----                  ----                     ----
                                    High         Low        High        Low          High         Low
  <S>                             <C>          <C>        <C>         <C>         <C>         <C>
  First Quarter................   $ 17.88      $ 14.63    $ 31.06     $ 24.00     $  27.06    $  23.19
  Second Quarter...............     19.00        14.88      32.06       28.06        24.44       20.13
  Third Quarter................     21.75        17.00      32.69       19.00        21.56       16.56
  Fourth Quarter (for 1999,
    Through October 12)........     30.25        21.06      27.81       18.19        18.06       16.50

</TABLE>

         The closing price per share of Dime common stock was $20.50 on June 28,
         1999, the last business day before the JeffBanks - Hudson United merger
         was announced,  $17.75 on September 14, 1999, the day before the Hudson
         United - Dime merger was  announced,  and $16.50 on October 12, 1999, a
         date shortly before the date of this supplement.

         Additional information about Dime can be obtained from its filings with
         the  SEC,  which  can  be  accessed  on  the  SEC's  Internet  site  at
         http://www.sec.gov.

Q:       Dime Savings Bank is a "thrift" and Hudson  United Bank is a commercial
         bank - what form will the primary Dime United subsidiary take after the
         merger?

A:       It is expected that the primary  depository  institution  subsidiary of
         Dime United after the merger will be a New Jersey chartered  commercial
         bank to be named "DimeBank."

Q:       What do I do now?

A:       We urge you to read this  supplement  and the attached  original  proxy
         statement-prospectus   before  deciding  how  to  vote  on  the  Hudson
         United-JeffBanks merger. Then, vote your shares in the manner indicated
         below.  Because of the importance of the information  contained in this
         supplement,  we have  decided to solicit new  proxies for the  meeting.
         None of the white proxy  cards  which you or your  fellow  shareholders
         sent in response to the original proxy  solicitation will be counted at
         the meeting.  Even if you previously  voted by proxy and do not wish to
         change your vote, you must send in a yellow (JeffBanks) or blue (Hudson
         United)  proxy card (or vote in person at the meeting) for your vote to
         be counted.

Q:       How do I vote by proxy?

A:       Just  indicate  on the  enclosed  proxy  card how you want to vote with
         respect to the Hudson United - JeffBanks merger. Sign the card and mail
         it in the enclosed  prepaid return envelope as soon as possible so that
         your shares may be represented and voted at the meeting.

Q:       Can I change my vote after I have mailed my signed proxy card?

A:       Yes. There are three ways in which you may revoke your proxy and change
         your vote.  First,  you may send a written  notice of revocation to the
         corporate  secretary.  (Information  on how to  contact  the  corporate
         secretaries  of  JeffBanks  and Hudson  United is contained on page 4.)
         Second,  you may  complete  and submit a new proxy  with a later  date.
         Third,  you may attend  the  JeffBanks  or Hudson  United  meeting  and
         request a return of your proxy or vote in person.  Simply showing up at
         the meeting without voting will not revoke your proxy.

Q:       Should JeffBanks shareholders send in their stock certificates now?

A:       No. After the Hudson  United - JeffBanks  merger is  completed,  Hudson
         United's  exchange  agent  will  send  JeffBanks  shareholders  written
         instructions for exchanging  their stock  certificates for certificates
         representing Hudson United common stock.

Q:       When  do  you  expect  the  Hudson  United  -  JeffBanks  merger  to be
         completed?

A:       We  currently  expect  the  Hudson  United  -  JeffBanks  merger  to be
         completed  during the  fourth  quarter  of 1999.  If all other  closing
         conditions are met, the closing may occur right after the Hudson United
         shareholders and the JeffBanks shareholders approve the merger at their
         reconvened  meetings.  However,  the exact time when the merger will be
         completed is dependent  upon receipt of  shareholder  approval and bank
         regulatory approval,  and satisfaction of a number of other conditions,
         some of which are not under JeffBanks' or Hudson United's control.

Q:       What  conditions  must be met in  order  for the  Hudson  United - Dime
         merger to close?

A:       Completion  of the Hudson  United - Dime  merger is  contingent  on the
         satisfaction of a number of conditions, including:

         o  Approval  of the merger  agreement  by both  Hudson  United and Dime
            shareholders,

         o  Receipt of bank regulatory approvals,

         o  Receipt  of  opinions  from  Dime's  and  Hudson  United's  counsels
            regarding the tax-free nature of the merger, and

         o  Receipt of a letter  from  Dime's and  Hudson  United's  independent
            public  accountants  regarding   qualification  of  the  merger  for
            pooling-of-interests accounting.

Q:       When do you expect the Hudson United-Dime merger to be completed?

A:       We  currently  expect the Hudson  United - Dime merger to be  completed
         during the first  quarter of 2000.  However,  we cannot assure you that
         the  Hudson  United  - Dime  merger  will  be  completed  or,  if it is
         completed, when that will occur.

Q:       Will  JeffBanks  shareholders  get to vote on the Hudson  United - Dime
         merger?

A:       The Hudson United Board of Directors has not yet called a  shareholders
         meeting to vote on the Hudson  United-Dime  merger,  and thus no record
         date has been set. On the date this supplement is being mailed,  Hudson
         United  expects  that the  Hudson  United -  JeffBanks  merger  will be
         completed  before the record  date for the  meeting to vote on the Dime
         merger.  If that timetable is met, former JeffBanks  shareholders  will
         become Hudson United shareholders and will have the same opportunity as
         the other Hudson United  shareholders  to consider and vote on the Dime
         merger. We cannot assure you that this will occur. If the Hudson United
         - JeffBanks  merger does not close before the Hudson United record date
         for voting on the Dime merger, you will not have an opportunity to vote
         on the Dime  merger.  In that event,  which we consider  unlikely,  the
         JeffBanks  Board  of  Directors  will  determine   whether  to  further
         supplement  the  proxy  statement-prospectus  and  resolicit  JeffBanks
         shareholder approval of the Hudson United - JeffBanks merger.

Q:       Where can I obtain a copy of the Hudson United - Dime merger  agreement
         and other information about the Hudson United - Dime merger?

A:       The  Hudson  United - Dime  merger  agreement  is an  exhibit to Hudson
         United's Current Report on Form 8-K filed with the SEC on September 24,
         1999. The press release issued by Hudson United and Dime announcing the
         merger agreement and certain  information used to explain the merger to
         stock  analysts  on  the  day  of   announcement   and  other  relevant
         information are exhibits to Hudson United's  Current Report on Form 8-K
         filed  with  the  SEC  on  September  16,  1999.   Certain   additional
         information  explaining  the merger  are  exhibits  to Hudson  United's
         Current  Report on Form 8-K filed with the SEC on  September  20, 1999.
         Each of these  filings are  incorporated  by  reference  into the proxy
         statement-prospectus.  These and other SEC  filings  can be accessed on
         the SEC's  Internet site at  http://www.sec.gov.  In addition,  you may
         obtain  copies of JeffBanks or Hudson United SEC filings free of charge
         by writing or calling:

         For JeffBanks Documents:

         William H. Lamb, Corporate Secretary
         JeffBanks, Inc.
         1845 Walnut Street
         Philadelphia, Pennsylvania 19103
         (215) 861-7000

         For Hudson United Documents:

         D. Lynn Van Borkulo-Nuzzo, Corporate Secretary
         Hudson United Bancorp
         1000 MacArthur Boulevard
         Mahwah, New Jersey 07430
         (201) 236-2641

         We will respond to your request  within one business day by sending the
         requested  documents by first class mail or other equally prompt means.
         In order to ensure  timely  delivery of the documents in advance of the
         reconvened meetings, any request should be made by November 5, 1999.

Q:       Whom should I call with  questions  or to obtain  additional  copies of
         this document?

A:       You should contact either William H. Lamb or D. Lynn Van Borkulo-Nuzzo,
         at the addresses and telephone numbers listed in the preceding answer.


<PAGE>

                                TABLE OF CONTENTS


Questions and Answers.........................................................1
How to Get Copies of Related Documents........................................5
Information Incorporated by Reference.........................................6
Information About the Proposed Hudson United - Dime Merger....................7
Information About Dime Bancorp, Inc...........................................8
Effect of the Hudson United - Dime Merger on JeffBanks Shareholders...........9
Management and Operations After the Merger....................................9
Recommendation of the JeffBanks Board of Directors...........................10
Recommendation of the Hudson United Board of Directors.......................10
Updated Summary Financial Data Of Hudson United..............................10
Updated Summary Financial Data Of JeffBanks..................................12
Recent Developments Concerning Hudson United ................................14
Status of Regulatory Approvals on the JeffBanks - Hudson United Merger.......14
Updated Comparative Share Information and Market Prices......................15
Summary Pro Forma Financial Information......................................16
Pro Forma Financial Information..............................................17
Information About the Reconvened JeffBanks Meeting...........................25
Information About the Reconvened Hudson United Meeting.......................26
Other Matters................................................................27
Experts  ....................................................................27

                     HOW TO GET COPIES OF RELATED DOCUMENTS

         The  proxy   statement-prospectus   and  this  supplement   incorporate
important  business  and  financial  information  that  is  not  included  in or
delivered with the proxy  statement-prospectus or this supplement.  JeffBanks or
Hudson United shareholders may receive the information free of charge by writing
or calling the persons  listed  below.  For Hudson United  documents,  make your
request  to D.  Lynn  Van  Borkulo-Nuzzo,  Corporate  Secretary,  Hudson  United
Bancorp,  1000 MacArthur  Boulevard,  Mahwah,  NJ 07430;  telephone number (201)
236-2641.  For  JeffBanks  documents,  make your  request  to  William  H. Lamb,
Corporate  Secretary,  JeffBanks,  Inc.,  1845 Walnut Street,  Philadelphia,  PA
19103;  telephone  (215)  861-7000.  We will respond to your request  within one
business  day by sending the  requested  documents  by first class mail or other
equally  prompt means.  In order to ensure  timely  delivery of the documents in
advance of the  reconvened  meetings,  any request should be made by November 5,
1999.


                      INFORMATION INCORPORATED BY REFERENCE

         Hudson United  changed its name from HUBCO,  Inc. on April 22, 1999 and
documents  filed before that date may be located on the SEC Edgar database under
that name.

         The following  documents  filed by Hudson United  (Commission  File No.
1-08660) with the SEC are hereby incorporated in the proxy  statement-prospectus
and in this supplement:

o             Annual  Report on Form 10-K for the year ended  December 31, 1998,
              as amended by Form 10-K/A  filed on  September  28,  1999,  and as
              further amended by Form 10-K/A filed October 12, 1999.

o             Quarterly Reports on Form 10-Q for the quarters ended March 31 and
              June 30, 1999,  as amended by Form 10-Q/A  filed on September  10,
              1999. (The Form 10-Q/A clarifies that the authorized capital stock
              of Hudson  United  consists of 100 million  shares of common stock
              and 25 million shares of preferred stock.)

o             Current  Reports  on Form 8-K filed  with the SEC on  January  28,
              March 29,  April 19, April 22, May 25, June 29 (as amended on June
              30), July 26,  September 16, September 20, September 24, September
              24 (second  filing),  and October 5, 1999. One of Hudson  United's
              two  Current  Reports  on Form 8-K  filed on  September  24,  1999
              includes as an exhibit the merger agreement  between Hudson United
              and  Dime.  Hudson  United's  Current  Report on Form 8-K filed on
              October 5, 1999 includes as an exhibit  Dime's  audited  financial
              statements for the year ended December 31, 1998.

o             The  description of Hudson United common stock set forth in Hudson
              United's  Registration  Statement  on Form 8-A12B  filed by Hudson
              United on April 22,  1999,  pursuant to Section 12 of the Exchange
              Act, and any amendment or report filed for the purpose of updating
              such description.

         The  following  documents  filed  by  JeffBanks  (Commission  File  No.
1-14318) with the SEC are hereby incorporated in the proxy  statement-prospectus
and in this supplement:

o        Annual Report on Form 10-K for the year ended December 31, 1998.

o        Quarterly Reports on Form 10-Q for the quarters ended March 31 and June
         30, 1999.

o        Current Report on Form 8-K filed with the SEC on July 29, 1999.

o        The  description  of  JeffBanks  common  stock set forth in  JeffBanks'
         Registration  Statement  on Form 8-A  filed by  JeffBanks  pursuant  to
         Section 12 of the Exchange  Act, and any  amendment or report filed for
         the purpose of updating such description.

         All documents filed by Hudson United or JeffBanks  pursuant to Sections
13(a), 13(c), 14, or 15(d) of the Exchange Act after the date of this supplement
but before the earlier of

o         the date of the JeffBanks meeting,

o         the date of the Hudson United meeting, or

o         the termination of the Hudson United - JeffBanks merger agreement,

are hereby  incorporated  by reference into the proxy  statement-prospectus  and
this supplement and shall be deemed a part of the proxy statement-prospectus and
this supplement from the date they are filed.

         Any statement contained in a document  incorporated by reference in the
proxy  statement-prospectus  and this supplement shall be considered modified or
superseded   to  the   extent   that  a   statement   contained   in  the  proxy
statement-prospectus,  in this supplement, or in any subsequently filed document
incorporated  by  reference  in  the  proxy  statement-prospectus,  modifies  or
supersedes the statement.  Any statement so modified or superseded  shall not be
considered,  except as so modified or  superseded,  to  constitute a part of the
proxy statement-prospectus and this supplement.

         The public may read and copy any  documents  Hudson United or JeffBanks
file with the SEC at the SEC's Public Reference Room at 450 Fifth Street,  N.W.,
Washington,  DC 20549. The public may obtain information on the operation of the
Public  Reference  Room by  calling  the  SEC at  1-800-SEC-0330.  The SEC  also
maintains  an  Internet  site  that  contains  reports,  proxy  and  information
statements,   and  other  information  about  Hudson  United  and  JeffBanks  at
http://www.sec.gov.

           INFORMATION ABOUT THE PROPOSED HUDSON UNITED - DIME MERGER

         More  Complete  Information  is  Available  Elsewhere.   The  following
information is derived primarily from the merger agreement between Hudson United
Bancorp and Dime Bancorp,  Inc.,  dated  September  15, 1999.  Hudson United has
filed Current  Reports on Form 8-K containing as exhibits the merger  agreement,
the press  release  issued by  Hudson  United  and Dime  announcing  the  merger
agreement and certain  information used to explain the merger to stock analysts.
These  and other SEC  filings  can be  accessed  on the SEC's  Internet  site at
http://www.sec.gov.  In  addition,  you may  obtain  copies  of the SEC  filings
incorporated  by reference in the proxy  statement-prospectus  free of charge by
writing or calling the Corporate  Secretaries of Hudson United or JeffBanks,  at
the addresses and phone numbers shown for them on page 4.

         Hudson United has entered into  agreements  with Dime. On September 15,
1999 Hudson  United  announced  an agreement  to merge with Dime  Bancorp,  Inc.
Hudson United and Dime also entered into  customary  stock option  agreements by
which  each  provided  the other with the right to  purchase  up to 19.9% of its
common  stock  under  certain  specified   circumstances.   These  stock  option
agreements are designed to deter third parties from attempting to acquire either
Hudson United or Dime.

         The surviving  corporation will be called Dime United Bancorp, Inc. The
transaction is structured so that Hudson United will merge into Dime,  with Dime
as the surviving corporation.  The name of the merged entity will be Dime United
Bancorp, Inc. In this supplement, we refer to the surviving corporation as "Dime
United." While Hudson United is a New Jersey corporation,  Dime United will be a
Delaware  corporation.  The  certificate  of  incorporation  of Dime United will
differ from Hudson United's  certificate of incorporation  in certain  respects.
Hudson  United is a  commercial  bank holding  company,  while Dime is a unitary
savings and loan holding company.  Dime United will be a commercial bank holding
company.

         Management of the combined  company will come from both Dime and Hudson
United.  The  transaction  is  structured  as a "merger of  equals."  The Hudson
United-Dime merger agreement provides that the Board of Directors of Dime United
will  initially  be composed of 13 former Dime  directors  and 12 former  Hudson
directors. Under the terms of the merger agreement,  Lawrence J. Toal, currently
the Chairman and CEO of Dime,  is to serve in the same  capacity for Dime United
until his  retirement on December 31, 2002. The merger  agreement  provides that
Kenneth T. Neilson, currently the Chairman and CEO of Hudson United, is to serve
as President and COO of Dime United until  December 31, 2002,  and then he is to
become Dime United's Chairman and CEO.

         Each share of Hudson United is to become one share of Dime United. Upon
completion  of the  merger,  each  share of  Hudson  United  common  stock  will
automatically  become one share of common  stock in Dime  United.  Each share of
Dime common stock will become  0.585  shares of Dime United  common stock in the
merger. On September 14, 1999, the day before  announcement of the Hudson United
- - Dime merger agreement,  the closing price of Hudson United common stock on the
NYSE was  $30.13  and the  closing  price of Dime  common  stock on the NYSE was
$17.75. On October 12, 1999, the closing price of Hudson United common stock was
$29.00 and the closing price of Dime common stock was $16.50.

         Hudson  United  common  stock and Dime  common  stock are  NYSE-listed.
Hudson  United  common  stock and Dime  common  stock are traded on the New York
Stock  Exchange under the symbols "HU" and "DME",  respectively  The Dime United
common stock is also expected to be listed on the NYSE.

         The merger is intended to be tax-free for  shareholders.  The merger is
structured  so that Hudson  United  shareholders  will not  generally  recognize
federal  income tax gain or loss upon  receiving Dime United common stock in the
merger.

         Dime United will operate its primary  subsidiary as a commercial  bank.
Dime Savings Bank is a "thrift" and Hudson United Bank is a New Jersey-chartered
commercial  bank.  It  is  expected  that  the  primary  depository  institution
subsidiary  of Dime  United  after the  merger  will be a New  Jersey  chartered
commercial bank named "DimeBank."

         Completion of the merger is subject to numerous conditions.  Completion
of the Hudson United - Dime merger is contingent on the satisfaction of a number
of conditions, including:

         o  Approval  of the merger  agreement  by both  Hudson  United and Dime
            shareholders,

         o  Receipt of bank regulatory approvals,

         o  Receipt of an opinion  from  Dime's  and  Hudson  United's  counsels
            regarding the tax-free nature of the merger, and

         o  Receipt of a letter  from  Dime's and  Hudson  United's  independent
            public  accountants  regarding   qualification  of  the  merger  for
            pooling-of-interests accounting.

         The  merger is  expected  to close  during  the first  quarter of 2000.
Assuming that shareholder  approval is received and other closing conditions are
satisfied, Hudson United anticipates that its merger with Dime will be completed
during the first quarter of 2000. However,  the exact time when that merger will
be completed is dependent upon receipt of approval from the shareholders of both
Hudson United and Dime, receipt of bank regulatory approval, and satisfaction of
a number of other conditions, many of which are outside Hudson United's control.
We cannot  assure you that all of the  conditions  will be satisfied in a timely
fashion or at all.

                      INFORMATION ABOUT DIME BANCORP, INC.

         Dime Bancorp,  Inc. is a savings and loan holding company  incorporated
in Delaware, and headquartered in New York City. Dime is the holding company for
The Dime Savings Bank of New York, FSB, a federally-chartered  savings bank. The
principal  subsidiary of Dime Savings Bank is North American Mortgage Company, a
mortgage  banking company that was acquired by Dime in October 1997. At June 30,
1999, Dime operated 100 banking branches located throughout the greater New York
City  metropolitan  area.  Directly and through North American Mortgage Company,
Dime also provides  consumer  financial  services and mortgage  banking services
throughout  the  United  States.  At June 30,  1999,  Dime had  assets  of $21.4
billion,  deposits of $13.4  billion and  stockholders'  equity of $1.5 billion.
Dime is currently  in the process of acquiring 28 branches of Key Bank,  N.A. on
Long Island,  New York.  Additional  information about Dime can be obtained from
its filings with the SEC.

                    EFFECT OF THE HUDSON UNITED - DIME MERGER
                            ON JEFFBANKS SHAREHOLDERS

         The Hudson  United - JeffBanks  merger  agreement  calls for  JeffBanks
shareholders to receive 0.95 shares of Hudson United common stock for each share
of JeffBanks common stock.  The Hudson United - Dime merger  agreement  provides
that each share of Hudson United  common stock will be converted  into one share
of Dime United common stock.  Therefore if the Hudson United - JeffBanks  merger
is completed, and the Hudson United - Dime merger is also completed,  each share
of  JeffBanks  common  stock will  ultimately  become 0.95 shares of Dime United
common stock.  These shares would  represent an equity interest in a corporation
which includes the combined operations of Hudson United and Dime. On a pro forma
basis,  assuming completion of Hudson United's pending acquisitions of JeffBanks
and Southern  Jersey Bancorp of Delaware,  Inc., the combined  entity would have
assets in excess of $30 billion,  banking  operations  in four states (New York,
New Jersey,  Pennsylvania and Connecticut),  and nationwide  consumer  financial
services  and  mortgage  banking   activities.   See  the  Pro  Forma  Financial
Information beginning on page 17.

         When you vote on the  JeffBanks  - Hudson  United  merger,  you are not
voting on the Hudson United - Dime merger.  We cannot assure you that the Hudson
United - Dime merger will be completed  or, if it is  completed,  when that will
occur.

                   MANAGEMENT AND OPERATIONS AFTER THE MERGER

         The disclosure in the proxy  statement-prospectus  on page 51 under the
caption  "Management and Operations After the Merger" is amended as follows,  to
address the effects of the proposed Hudson United - Dime merger.

         As a result of the JeffBanks - Hudson United merger,  JeffBanks will be
merged  with  Hudson  United,  with  Hudson  United  as  the  surviving  entity.
Immediately  following  that merger,  Jefferson  Bank and Jefferson  Bank of New
Jersey will both be merged with and into Hudson United Bank,  with Hudson United
Bank as the surviving  entity.  Hudson United Bank will continue to operate as a
wholly-owned subsidiary of Hudson United.

         Hudson United agreed in the Hudson United - JeffBanks  merger agreement
that,  for a period of at least three years after the  JeffBanks - Hudson United
merger,  Hudson United Bank will operate a separate  division to be known as the
Jefferson  Bank  Division  of the bank.  Hudson  United and Dime have  agreed to
continue  operating the separate  division if the Hudson United - Dime merger is
completed.  Hudson  United  will  cause  the  appointment  of Betsy Z.  Cohen as
Chairperson  and Chief  Executive  Officer  of the new  division,  and Robert B.
Goldstein as President and Chief  Operating  Officer of the new  division.  Mrs.
Cohen is currently Chairperson and Chief Executive Officer of JeffBanks, and Mr.
Goldstein is currently President and Chief Operating Officer of JeffBanks and of
Jefferson  Bank.  All current  JeffBanks  directors  will be invited to serve as
advisory  directors for the new division.  The new division will be  responsible
for the former business  banking  operations of JeffBanks'  subsidiary banks and
the southern New Jersey  branches of Hudson United Bank.  The division will also
be  responsible  for the  residential  mortgage  lending  and  consumer  lending
operations  of  Hudson  United  Bank.  If the  Hudson  United - Dime  merger  is
completed,  responsibility  for the  residential  mortgage  lending and consumer
lending operations of Dime Bank is expected to be shifted elsewhere, although no
decision has yet been made.

         Hudson  United has agreed to appoint Mrs.  Cohen and William H. Lamb as
directors of Hudson United when the JeffBanks - Hudson United merger occurs. Mr.
Lamb  is  currently  a  JeffBanks  director.  At  Hudson  United's  next  annual
shareholders'  meeting,  Mrs.  Cohen will be nominated to serve for a three-year
term.  If the Hudson  United - Dime  merger  occurs on the  timetable  currently
contemplated,  Hudson United will have no further annual shareholders' meetings.
Hudson United has also agreed to appoint  three persons  designated by JeffBanks
and  reasonably  acceptable  to Hudson United as directors of Hudson United Bank
when the JeffBanks - Hudson United merger occurs.

         If the Hudson  United - Dime merger is  completed,  Hudson  United will
have the right to designate  12 of the 25  directors of Dime United.  (Dime Bank
will have the same directors as Dime United.) We anticipate that the JeffBanks -
Hudson United merger will close before the Hudson United - Dime merger, and that
the Hudson United Board of Directors will select its 12 director-designees  from
among those persons (including Mrs. Cohen and Mr. Lamb) who will be directors of
Hudson United when the selection is made.

               RECOMMENDATIONS OF THE JEFFBANKS BOARD OF DIRECTORS

         The  JeffBanks  Board of  Directors  has  considered  the impact of the
Hudson United - Dime merger agreement,  has confirmed its approval of the Hudson
United - JeffBanks merger agreement, and has determined that the Hudson United -
JeffBanks  merger remains fair to, and in the best  interests of,  JeffBanks and
its shareholders.  Accordingly,  the Board of Directors of JeffBanks unanimously
recommends  that  JeffBanks  shareholders  vote FOR approval and adoption of the
Hudson United - JeffBanks merger agreement and merger.

             RECOMMENDATIONS OF THE HUDSON UNITED BOARD OF DIRECTORS

         The  Board of  Directors  of Hudson  United  continues  to  unanimously
recommend that Hudson United  shareholders vote FOR approval and adoption of the
Hudson United - JeffBanks merger agreement and merger.

                 UPDATED SUMMARY FINANCIAL DATA OF HUDSON UNITED

         The following is a summary of certain historical consolidated financial
data for  Hudson  United as of and for the six months  ended  June 30,  1999 and
1998. This financial data should be read in conjunction  with the financial data
for Hudson  United for the years 1994 through  1998,  and as of the end of those
years, set forth on pages 9-11 of the joint proxy statement-prospectus. The data
presented  as of and for the six months  ended June 30, 1999 and 1998 comes from
Hudson United's unaudited  consolidated  financial  statements.  Hudson United's
unaudited  consolidated  financial statements as of and for the six months ended
June 30, 1999 and 1998 are incorporated by reference in this document. See pages
6 - 7.

         In the opinion of Hudson United's management,  the unaudited data shown
below reflects all adjustments  necessary for a fair  presentation of that data.
All such adjustments  were normal,  recurring  adjustments.  Results for the six
months  ended June 30, 1999 do not  necessarily  indicate  the results  that you
should expect for any other interim period or for the year as a whole.

<PAGE>

<TABLE>
<CAPTION>


                                                                   At or for the Six Months ended June 30,
                                                               -------------------------------------------------
                                                                     1999                            1998
                                                               -----------------               -----------------
                                                               (Dollars in thousands, except per share amounts)
<S>                                                            <C>                             <C>
Earnings Summary:
Interest income                                                $     232,369                   $    233,377
Interest expense                                                     102,069                        106,974
                                                               --------------                  -------------
Net interest income                                                  130,300                        126,403
Provision for possible loan losses                                     5,000                          9,099
                                                               --------------                  -------------

Net interest income after provision for
      possible loan losses                                           125,300                        117,304
Other income                                                          34,520                         28,961
Other expenses                                                        82,807                        114,004
                                                               --------------                  -------------
Income before income taxes                                            77,013                         32,261
Income tax provision                                                  26,950                         12,777
                                                               --------------                  -------------
Net income                                                     $      50,063                   $     19,484
                                                               ==============                  =============

Share Data:
Weighted average common shares
      Outstanding (in thousands):
      Basic                                                           39,829                         40,912
      Diluted                                                         40,380                         42,234
Basic earnings per share                                       $        1.26                   $       0.48
Diluted earnings per share                                              1.24                           0.46
Cash dividends per common share                                         0.50                           0.39
Book value per common share                                            10.70                          11.77

Balance Sheet Summary:
Securities held to maturity                                    $     629,133                   $    919,356
Securities available for sale                                      2,580,667                      1,943,323
Loans                                                              3,537,792                      3,523,517
Total assets                                                       7,226,088                      7,016,924
Deposits                                                           4,997,836                      5,439,595
Stockholders' equity                                                 422,989                        478,879

Performance Ratios:
Return on average assets                                                1.49 %                         0.60 %
Return on average equity                                               23.19                           7.74
Dividend payout                                                        39.68                          81.25
Average equity to average assets                                        6.41                           7.78
Net interest margin                                                     4.15                           4.19

Asset Quality Ratios:
Allowance for possible loan losses to total
      loans                                                             1.57 %                         1.88 %
Allowance for possible loan losses to
      non-performing loans                                               289                            110
Non-performing loans to total loans                                     0.54                           1.72
Non-performing assets to total loans, plus
      other real estate                                                 0.59                           1.99
Net charge-offs to average loans                                        0.24                           0.59


</TABLE>

<PAGE>


                   UPDATED SUMMARY FINANCIAL DATA OF JEFFBANKS

         The following is a summary of certain selected historical  consolidated
financial  data for  JeffBanks  as of and for the six months ended June 30, 1999
and 1998.  This financial data should be read in conjunction  with the financial
data for JeffBanks  for the years 1994 through 1998,  and as of the end of those
years,  set forth on pages  12-14 of the joint proxy  statement-prospectus.  The
data  presented  as of and for the six months ended June 30, 1999 and 1998 comes
from  JeffBanks'  unaudited   consolidated   financial  statements.   JeffBanks'
unaudited  consolidated  financial statements as of and for the six months ended
June 30, 1999 and 1998 are incorporated by reference in this document. See pages
6 - 7.

         In the opinion of JeffBanks' management, the unaudited data shown below
reflects all  adjustments  necessary for a fair  presentation  of that data. All
such adjustments were normal, recurring adjustments.  Results for the six months
ended June 30, 1999 do not  necessarily  indicate  the  results  that you should
expect for any other interim period or for the year as a whole.

<PAGE>


<TABLE>
<CAPTION>

                                                                       At or for the Six Months ended June 30,
                                                                    -----------------------------------------------
                                                                        1999                             1998
                                                                    --------------                  ---------------
                                                                       (Dollars in thousands, except per share
                                                                                       amounts)
<S>                                                               <C>                             <C>
Earnings Summary:
Interest income                                                   $        62,455                 $         59,690
Interest expense                                                           31,087                           30,553
                                                                  ----------------                -----------------
Net interest income                                                        31,368                           29,137
Provision for credit losses                                                 2,985                            3,513
                                                                  ----------------                -----------------

Net interest income after provision for credit
      losses                                                               28,383                           25,624
Other income                                                                8,084                            7,374
Other expense                                                              26,184                           27,567
                                                                  ----------------                -----------------
Income before income taxes                                                 10,283                            5,431
Income taxes                                                                2,152                            1,798
                                                                  ----------------                -----------------
Net income                                                        $         8,131                 $          3,633
                                                                  ================                =================

Share Data:
Weighted average common shares
      Outstanding (in thousands):
      Basic                                                                10,517                           10,232
      Diluted                                                              11,010                           11,095
Basic earnings per share                                          $          0.77                 $           0.36
Diluted earnings per share                                                   0.74                             0.33
Cash dividends per common share                                              0.31                             0.18
Book value                                                                  12.47                            12.11

Balance Sheet Summary:
Securities held to maturity                                       $           675                 $            680
Securities available for sale                                             313,281                          338,521
Loans                                                                   1,358,900                        1,140,702
Total assets                                                            1,857,384                        1,696,577
Deposits                                                                1,384,423                        1,289,992
Stockholders' equity                                                      131,922                          124,397

Performance Ratios:
Return on average assets                                                     0.95 %                           0.47 %
Return on average equity                                                    12.30                             5.88
Dividend payout ratio                                                       38.16                            52.22
Average equity to average assets                                             7.76                             7.94
Net interest margin                                                          4.24                             4.13

Asset Quality Ratios:
Allowance for possible loan losses to total loans
                                                                             0.90 %                           1.23 %
Allowance for possible loan losses to
      non-performing loans                                                    117                              125
Non-performing loans to total loans                                          0.77                             0.99
Non-performing assets to total loans, plus other
      real estate                                                            0.94                             1.16
Net charge-offs to average loans                                             0.50                             0.69


</TABLE>

<PAGE>


                  RECENT DEVELOPMENTS CONCERNING HUDSON UNITED

         Acquisition of Lyon Credit Corporation.

         On September 10, 1999,  Hudson United Bank entered into an agreement to
purchase   substantially  all  the  assets  of  Lyon  Credit  Corporation.   The
transaction is expected to close during the fourth quarter of 1999, and will add
approximately $350 million of project finance,  equipment, and asset based loans
to Hudson United Bank's assets,  along with loan production offices in Stamford,
CT, Atlanta, Dallas, Irvine, CA, Chicago,  Houston, San Francisco, and Portland,
OR.

                         STATUS OF REGULATORY APPROVALS
                     ON THE JEFFBANKS - HUDSON UNITED MERGER

         Hudson United has applied to all necessary bank regulatory  authorities
for  approval  of  the  Hudson  United  -  JeffBanks  merger.  The  Pennsylvania
Department of Banking has approved the Hudson United - JeffBanks merger, as well
as the merger of one of JeffBanks' subsidiary banks, Jefferson Bank, into Hudson
United's  subsidiary bank, Hudson United Bank. In addition,  the Federal Reserve
Board has agreed to waive its  approval  requirement  with respect to the merger
based upon the need for approval by the Federal Deposit  Insurance  Corporation.
As of the date of this document, we have not yet received the required approvals
of the FDIC and the New Jersey Department of Banking and Insurance.  While we do
not  know  of any  reason  why we  would  not be able to  obtain  the  necessary
approvals  in a timely  manner,  we cannot be certain when or if we will receive
them.  As of the date of this  supplement,  neither  Hudson  United nor Dime has
applied for any regulatory approvals for the Hudson United - Dime merger.



<PAGE>


                      UPDATED COMPARATIVE SHARE INFORMATION
                                AND MARKET PRICES

         The first table below presents, for the periods indicated, the high and
low closing prices per share of Hudson United common stock and JeffBanks  common
stock.  The closing  prices of Hudson  United common stock have been restated to
give  retroactive  effect to stock dividends and stock splits.  The second table
presents  information  concerning the last closing price of Hudson United common
stock and JeffBanks  common stock on June 28, 1999, the last business day before
the JeffBanks - Hudson United  merger was  announced,  on September 14, the last
day before the Hudson  United - Dime  merger  agreement  was  announced,  and on
October 12, 1999, a date shortly before the date of this supplement.  The second
table also  presents  the  equivalent  value of Hudson  United  common stock per
JeffBanks  share which is  computed by  multiplying  the last  closing  price of
Hudson United common stock on the dates  indicated by the 0.95 exchange ratio in
the JeffBanks - Hudson United  merger  agreement.  Hudson United common stock is
listed on the New York Stock  Exchange  under the symbol  "HU".  Until April 30,
1999,  Hudson United's  common stock was listed on the NASDAQ  National  Market.
JeffBanks  common stock is traded on the NASDAQ National Market under the symbol
"JEFF." We urge you to obtain current market quotations for Hudson United common
stock and JeffBanks common stock.

<TABLE>
<CAPTION>

                                                      Closing Sale Price Per             Closing Sale Price Per
                                                         Share of Hudson                   Share of JeffBanks
                                                       United Common Stock                    Common Stock
                                                       -------------------                    ------------
                                                       High          Low                 High           Low
                                                       ----          ---                 ----           ---
1997:
<S>                                                   <C>           <C>                 <C>            <C>
First Quarter...............................          $25.03        $21.44              $16.86         $15.14
Second Quarter..............................           27.57         20.86               17.10          16.05
Third Quarter...............................           31.11         26.16               23.03          16.95
Fourth Quarter..............................           37.99         30.05               28.80          20.40

1998:
First Quarter...............................          $37.86        $32.28              $32.33         $25.80
Second Quarter..............................           37.62         31.25               34.65          29.25
Third Quarter...............................           35.00         25.38               32.25          18.75
Fourth Quarter..............................           30.13         21.63               25.00          18.75

1999:
First Quarter...............................          $34.25        $29.75              $22.25         $19.63
Second Quarter..............................           36.00         30.63               28.94          20.00
Third Quarter...............................           33.75         28.31               30.75          26.13
Fourth Quarter (through October 12, 1999)...           31.31         29.00               29.13          27.19


<CAPTION>

                                                                              Equivalent Value of
                                 Closing Sale           Closing Sale         Hudson United Common
                               Price Per Share         Price Per Share        Stock Per Share of
                               of Hudson United         of JeffBanks           JeffBanks Common
                                 Common Stock           Common Stock                 Stock
                                 ------------           ------------                 -----
Date
June 28, 1999                       $ 34.94                $ 28.00                   $ 33.19
September 14, 1999                    30.13                  28.00                     28.62
October 12, 1999                      29.00                  27.19                     27.55


</TABLE>

<PAGE>


                     SUMMARY PRO FORMA FINANCIAL INFORMATION

         We present on this page certain pro forma unaudited  combined condensed
financial information derived from the unaudited Pro Forma Financial Information
for the periods and at the dates indicated.  The pro forma combined  information
gives effect to the proposed  mergers of Southern  Jersey,  JeffBanks  and Dime,
each  accounted  for as a  pooling-of-interests,  as if  the  mergers  had  been
consummated  for statement of income purposes on the first day of the applicable
periods and for balance sheet purposes on June 30, 1999. Information relative to
each  individual  merger is  presented in the Pro Forma  Financial  Information,
which begins on the next page. This summary pro forma  financial  information is
based on the historical financial statements of Hudson United,  Southern Jersey,
JeffBanks and Dime incorporated by reference herein.  Hudson United's historical
earnings  per  share  have been  restated  to give  retroactive  effect to stock
dividends and splits.  The pro forma combined  information  does not include the
effect of Hudson United's pending  acquisition of loans and deposits from Advest
Bank or its pending  acquisition  of the assets of Lyon Credit  Corporation.  We
have  determined  that the Advest and Lyon  Credit  acquisitions  do not present
significant  acquisitions in the context of the pro forma financial information.
The pro forma combined information does not include the effect of Dime's pending
acquisition of 28 branches of Key Bank, N.A. In addition, the pro forma combined
information  as of  June  30,  1999  does  not  include  Dime's  acquisition  of
Citibank's  auto  financing  unit,  which was  consummated  after June 30, 1999.
Information  regarding the acquisitions of certain assets and liabilities of Key
Bank and Citibank  have not been  included  because  these  acquisitions  do not
present  significant  acquisitions  in the  context  of the pro forma  financial
information  and  because  separate  financial  statements  for such  assets and
liabilities  are not  prepared  by the  companies  from  which  such  assets and
liabilities were acquired or are to be acquired.

         The  Summary  Pro  Forma  Financial   Information  should  be  read  in
conjunction  with the Pro Forma  Financial  Information  and the  related  notes
thereto beginning on the next page and the consolidated financial statements and
related notes incorporated by reference in this document.  The Summary Pro Forma
Financial  Information  is not  necessarily  indicative of the actual  financial
results  that would have  occurred had the mergers  been  consummated  as of the
beginning  of the  periods  for which the data is  presented  and  should not be
construed as being representative of future periods.

<TABLE>
<CAPTION>


                       Summary Pro Forma Unaudited Combined Condensed Financial Information
                                     (In thousands, except for per share data)

                                                      For the Six Months
                                                             Ended            For the Years Ended December 31,
                                                         June 30, 1999        1998         1997          1996
                                                         -------------        ----         ----          ----
<S>                                                           <C>             <C>          <C>            <C>
Net interest income before provision for
     possible loan losses                                     $443,120        $856,083     $809,606       $773,922
Provision for possible loan losses                              24,545          67,607       73,442         70,060
Net interest income after provision for
     possible loan losses                                      418,575         788,476      736,164        703,862
Income before income taxes
     and extraordinary items                                   276,976         398,357      331,268        230,548
Income tax provision                                            99,451         130,463      124,099         78,988
Income before extraordinary items                              177,525         267,894      207,169        151,560
Income before extraordinary items per share:
     Basic                                                        1.52            2.27         1.80           1.33
     Diluted                                                      1.50            2.22         1.74           1.27

                                                               As of
                                                          June 30, 1999
                                                          -------------
Total assets                                               $30,965,672
Total deposits                                              20,216,166
Total stockholders' equity                                   1,991,632
Book value per common share                                      16.96

</TABLE>


<PAGE>


                         PRO FORMA FINANCIAL INFORMATION

         Presented  on the  following  page is a pro  forma  unaudited  combined
condensed balance sheet of Hudson United, Southern Jersey, JeffBanks and Dime at
June 30, 1999,  giving  effect to each merger as if it had been  consummated  at
such  date.  Also  presented  are the pro  forma  unaudited  combined  condensed
statements  of income for the  six-month  period ended June 30, 1999 and for the
years ended December 31, 1998,  1997 and 1996. The unaudited pro forma financial
information  is based on the historical  financial  statements of Hudson United,
Southern Jersey, JeffBanks and Dime after giving effect to each merger under the
pooling-of-interests  method of accounting  and based upon the  assumptions  and
adjustments   contained  in  the  accompanying  notes  to  pro  forma  financial
information.

         The  unaudited  pro forma  financial  information  has been prepared by
Hudson United's  management based upon the historical  financial  statements and
related notes thereto of Hudson  United,  Southern  Jersey,  JeffBanks and Dime,
which are  incorporated  herein by reference.  The unaudited pro forma financial
information  should  be read in  conjunction  with  those  historical  financial
statements and notes.  The pro forma combined  information  does not include the
effect of Hudson United's pending  acquisition of loans and deposits from Advest
Bank or its pending  acquisition  of the assets of Lyon Credit  Corporation.  We
have  determined  that the Advest and Lyon  Credit  acquisitions  do not present
significant  acquisitions in the context of the pro forma financial information.
The pro forma combined information does not include the effect of Dime's pending
acquisition of 28 branches of Key Bank, N.A. In addition, the pro forma combined
information  as of  June  30,  1999  does  not  include  Dime's  acquisition  of
Citibank's  auto  financing  unit,  which was  consummated  after June 30, 1999.
Information  regarding the acquisitions of certain assets and liabilities of Key
Bank and Citibank  have not been  included  because  these  acquisitions  do not
present  significant  acquisitions  in the  context  of the pro forma  financial
information  and  because  separate  financial  statements  for such  assets and
liabilities  are not  prepared  by the  companies  from  which  such  assets and
liabilities were acquired or are to be acquired.

         The pro  forma  financial  data is not  necessarily  indicative  of the
actual  financial  results  that  would  have  occurred  had  the  mergers  been
consummated  as of the  beginning of the periods for which the data is presented
and should not be construed as being representative of future periods.


<PAGE>

<TABLE>
<CAPTION>

 Pro forma Unaudited Combined Condensed
 Balance Sheets
 As of June 30, 1999
 (Dollars in thousands, except per share data)

                                        Hudson         Southern      Pro forma       Pro forma                      Pro forma
 Assets                                 United          Jersey       Adjustment      Combined        JeffBanks      Adjustments
 ------                              -----------      ----------     -----------     -----------   -----------     -------------
<S>                                   <C>             <C>            <C>             <C>            <C>             <C>
Cash and due from banks .........    $   192,918      $   20,625     $      --       $   213,543    $     52,207    $       --
Federal funds sold and
  other investments..............          8,201          50,050            --            58,251          79,100            --
Securities ......................      3,209,800         114,148            --         3,323,948         313,956            --
Loans held for sale .............           --              --              --              --            19,951            --
Loans ...........................      3,537,792         242,194            --         3,779,986       1,338,949            --
Less: Allowance for loan losses          (55,680)         (9,182)           --           (64,862)        (12,203)           --
                                     ------------    ------------    -----------     -----------    ------------    -------------
    Total loans .................      3,482,112         233,012            --         3,715,124       1,326,746            --
                                     ------------    ------------    -----------     -----------    ------------    -------------
Other assets ....................        227,153          34,582            --           261,735          60,342            --
Intangibles, net of amortization         105,904            --              --           105,904           5,082            --
                                     ------------    ------------    -----------     -----------    ------------    -------------
     Total Assets ...............    $ 7,226,088      $  452,417     $      --       $ 7,678,505    $  1,857,384    $       --
                                     ============    ============    ===========     ===========    ============    ==============

Liabilities and Stockholders' Equity
- ------------------------------------

Deposits ........................    $ 4,997,836      $  419,109     $      --       $ 5,416,945    $  1,384,423    $       --
Borrowings ......................      1,504,399            --              --         1,504,399         259,239            --
Other liabilities ...............        100,864           5,151            --           106,015          24,580            --
                                    ------------    ------------    -----------     -----------    ------------    -------------
                                       6,603,099         424,260            --         7,027,359       1,668,242            --
Subordinated debt ...............        100,000            --              --           100,000          31,920            --
Capital Trust Securities ........        100,000            --              --           100,000          25,300            --
                                     ------------    ------------    -----------     -----------    ------------    -------------
     Total Liabilities ..........      6,803,099         424,260            --         7,227,359       1,725,462            --
                                     ------------    ------------    -----------     -----------    ------------    -------------
Stockholders' Equity:
     Common stock ...............         72,246           2,184             383          74,813          10,583           7,293
     Additional paid in capital .        264,468           3,259          (4,207)        263,520          98,177          (7,293)
     Retained earnings ..........        144,176          29,095            --           173,271          26,961            --
     Treasury stock .............        (36,504)         (3,824)          3,824         (36,504)            --             --
     Employee stock awards
       & ESOP shares............          (3,387)             --            --            (3,387)             --            --
     Accumulated other
       comprehensive loss......          (18,010)         (2,557)           --           (20,567)         (3,799)           --
                                     ------------    ------------    -----------     -----------    ------------    -------------
          Total Stockholders'
           Equity................        422,989          28,157            --           451,146         131,922            --
                                     ------------    ------------    -----------     -----------    ------------    -------------
     Total Liabilities and
      Stockholders' Equity.......      7,226,088         452,417            --         7,678,505       1,857,384    $       --
                                     ============    ============    ===========     ===========    ============    =============




Common shares outstanding
 (in thousands) .................         39,532           1,128                         40,976          10,583

Book value per common share .....     $    10.70        $   24.96                     $   11.01        $ 12.47


<PAGE>


<CAPTION>


                                       Pro forma                    Pro forma        Pro forma
Assets                                 Combined          Dime       Adjustments      Combined
- ------                                 --------          ----       -----------      --------
<S>                                 <C>             <C>             <C>              <C>
Cash and due from banks .........   $    265,750    $    300,543    $      --        $  566,293
Federal funds sold and
 other investments...............        137,351          12,588           --           149,939
Securities ......................      3,637,904       3,826,738           --         7,464,642
Loans held for sale .............         19,951       2,512,648           --         2,532,599
Loans ...........................      5,118,935      12,711,182           --        17,830,117
Less: Allowance for loan losses         (77,065)        (121,381)          --          (198,446)
                                    ------------    ------------    ------------    -------------
    Total loans .................      5,041,870      12,589,801           --        17,631,671
                                    ------------    ------------    ------------    -------------
Other assets ....................        322,077      1,884,442            --         2,206,519
Intangibles, net of amortization         110,986        303,023            --           414,009
                                    ------------    ------------    ------------    --------------
     Total Assets ...............    $ 9,535,889   $ 21,429,783     $      --      $ 30,965,672
                                    ============    ============    ============   ================

Liabilities and Stockholders' Equity
- ------------------------------------

Deposits ........................   $  6,801,368   $ 13,414,798     $      --      $ 20,216,166
Borrowings ......................      1,763,638      5,916,453            --         7,680,091
Other liabilities ...............        130,595        400,995        84,879           616,469
                                    ------------    ------------    ------------   -------------
                                       8,695,601     19,732,246        84,879        28,512,726
Subordinated debt ...............        131,920         51,886            --           183,806
Capital Trust Securities ........        125,300        152,208            --           277,508
                                    ------------    ------------    ------------   -------------
     Total Liabilities ..........      8,952,821     19,936,340        84,879        28,974,040
                                    ------------    ------------    ------------   -------------
Stockholders' Equity:
     Common stock ...............         92,689          1,203       (92,717)            1,175
     Additional paid in capital .        354,404      1,165,759      (124,267)        1,395,896
     Retained earnings ..........        200,232        561,428       (94,000)          667,660
     Treasury stock .............        (36,504)      (180,480)      216,984               --
     Employee stock awards
      & ESOP shares                       (3,387)        (5,825)        9,121               (91)
     Accumulated other
       comprehensive loss........        (24,366)       (48,642)          --            (73,008)
                                    ------------    ------------    ----------        -----------
          Total Stockholders'
            Equity...............        583,068      1,493,443       (84,879)        1,991,632
                                    ------------    ------------    ----------        -----------
     Total Liabilities and
       Stockholders' Equity......    $ 9,535,889   $ 21,429,783     $     --       $ 30,965,672
                                    ============    ============    ============   =============



Common shares outstanding
  (in thousands).................         51,030        113,539           --            117,450

Book value per common share .....    $     11.43    $     13.15     $     --       $      16.96

</TABLE>

 See notes to pro forma financial information.


<PAGE>


<TABLE>
<CAPTION>

Pro forma Unaudited Combined Condensed
Statements of Income
For the Six Months Ended June 30, 1999
(Dollars in thousands, except per share data)

                                     Hudson       Southern    Pro forma                     Pro Forma                   Pro Forma
                                      United       Jersey      Combined     JeffBanks       Combined         Dime       Combined
                                    ----------- ------------ -------------  -----------  -------------- -------------  ------------
<S>                                  <C>        <C>          <C>           <C>            <C>            <C>            <C>
Interest on loans                    $ 142,808  $    9,463   $   152,271   $  52,816      $   205,087    $  547,495     $ 752,582
Interest on securities                  89,035       3,252        92,287       9,095          101,382       126,360       227,742
Other interest income                      526       1,784         2,310         544            2,854           776         3,630
                                     ---------- -----------  ------------  ----------     ------------   -----------   -----------
    Total Interest Income              232,369      14,499       246,868      62,455          309,323       674,631       983,954
                                     ---------- -----------  ------------  ----------     ------------   -----------   -----------
Interest on deposits                    64,185       8,435        72,620      23,213           95,833       236,353       332,186
Interest on borrowings                  37,884           -        37,884       7,874           45,758       162,890       208,648
                                     ---------- -----------  ------------  ----------     ------------   -----------   -----------
    Total Interest Expense             102,069       8,435       110,504      31,087          141,591       399,243       540,834
                                     ---------- -----------  ------------  ----------     ------------   -----------   -----------
Net Interest Income before
    Provision for loan loss            130,300       6,064       136,364      31,368          167,732       275,388       443,120
Provision for loan loss                  5,000       1,060         6,060       2,985            9,045        15,500        24,545
                                     ---------- -----------  ------------  ----------     ------------   -----------   -----------
Net Interest Income after
    Provision for loan loss            125,300       5,004       130,304      28,383          158,687       259,888       418,575
Noninterest income                      34,520       2,274        36,794       8,084           44,878       301,733       346,611
Noninterest expense                     82,807       7,732        90,539      26,184          116,723       371,487       488,210
                                     ---------- -----------  ------------  ----------     ------------   -----------   -----------
Income (loss) before income taxes
Income (loss) before income taxes
    And extraordinary items             77,013        (454)       76,559      10,283           86,842       190,134       276,976
Income tax provision                    26,950           -        26,950       2,152           29,102        70,349        99,451
                                     ---------- -----------  -----------   ----------     ------------   -----------   -----------
Income (loss) before extraordinary
    Items                            $  50,063  $     (454)  $    49,609   $   8,131      $    57,740    $  119,785    $  177,525
                                     ========== ===========  ============  ==========     ============   ===========   ===========

Income (Loss) Before Extraordinary
    Items Per Share:
    Basic                            $    1.26  $    (0.40 ) $      1.20   $    0.77      $      1.13    $     1.08    $     1.52
    Diluted                          $    1.24  $    (0.40 ) $      1.19   $    0.74      $      1.10    $     1.06    $     1.50

Weighted Average Common Shares:
    (in thousands)
    Basic                               39,829       1,127        41,272      10,517           51,263       111,470       116,473
    Diluted                             40,380       1,127        41,823      11,010           52,283       112,841       118,295


</TABLE>

Notes to Pro forma financial information.


<PAGE>

<TABLE>
<CAPTION>

Pro forma  Unaudited  Combined  Condensed  Statements of Income For the Year
Ended December 31, 1998 (Dollars in thousands, except per share data)

                                      Hudson      Southern     Pro Forma                  Pro Forma                   Pro Forma
                                       United      Jersey      Combined     JeffBanks      Combined        Dime        Combined
                                    ----------- ------------  ------------  -----------  ------------- ------------- -------------
<S>                                 <C>         <C>           <C>           <C>          <C>           <C>           <C>
Interest on loans                   $  298,311  $   24,624    $   322,935   $   99,924   $  422,859    $ 1,159,364   $ 1,582,223
Interest on securities                 162,783       5,983        168,766       21,025      189,791        255,719       445,510
Other interest income                    7,453       2,676         10,129        2,544       12,673          5,802        18,475
                                      --------- -----------   ------------  -----------   ----------   ------------  ------------
    Total Interest Income              468,547      33,283        501,830      123,493      625,323      1,420,885     2,046,208
                                      ---------   ---------   ------------  -----------   ----------   ------------  ------------
Interest on deposits                   161,077      18,400        179,477       48,858      228,335        545,827       774,162
Interest on borrowings                  53,276           -         53,276       14,862       68,138        347,825       415,963
                                      --------- -----------   ------------  -----------   ----------   ------------  ------------
    Total Interest Expense             214,353      18,400        232,753       63,720      296,473        893,652     1,190,125
                                      --------- -----------   ------------  -----------   ----------   ------------  ------------
Net Interest Income before
    Provision for loan loss            254,194      14,883        269,077       59,773      328,850        527,233       856,083
Provision for loan loss                 14,374      15,270         29,644        5,963       35,607         32,000        67,607
                                      --------- -----------   ------------  -----------   ----------   ------------  ------------
Net Interest Income (Loss)
    After provision for loan loss      239,820        (387)       239,433       53,810      293,243        495,233       788,476
Noninterest income                      33,299       3,509         36,808       15,215       52,023        525,030       577,053
Noninterest expense                    232,096      15,842        247,938       53,593      301,531        665,641       967,172
                                      --------- -----------   ------------  -----------   ----------   ------------  ------------
Income (loss) before income taxes
    And extraordinary items             41,023     (12,720)        28,303       15,432       43,735        354,622       398,357
Income tax provision (benefit)          17,872      (4,888)        12,984        4,000       16,984        113,479       130,463
                                      --------- -----------   ------------  -----------   ----------   ------------  ------------
Income (loss) before extraordinary
     Items                          $   23,151  $   (7,832)   $    15,319   $   11,432    $  26,751    $   241,143    $  267,894
                                      ========= ===========   ============  ===========   ==========   ============  ============

Income (Loss) Before Extraordinary
    Items Per Share:
    Basic                           $     0.57  $    (6.95)   $      0.36   $     1.11    $    0.52    $      2.13    $     2.27
    Diluted                         $     0.56  $    (6.95)   $      0.36   $     1.04    $    0.50    $      2.09    $     2.22

Weighted Average Common Shares:
    (in thousands)
    Basic                               40,640       1,127         42,083       10,301       51,869        113,452       118,238
    Diluted                             41,696       1,127         43,139       10,956       53,547        115,153       120,912


</TABLE>

See notes to pro forma financial information.


<PAGE>


<TABLE>
<CAPTION>


Pro forma  Unaudited  Combined  Condensed  Statements of Income For the Year
Ended December 31, 1997 (Dollars in thousands, except per share data)

                                      Hudson       Southern      Pro Forma                   Pro Forma                    Pro forma
                                      United        Jersey        Combined     JeffBanks      Combined        Dime        Combined
                                   -------------  ------------  ------------- ------------- -------------  -----------  ------------
<S>                                <C>            <C>           <C>            <C>          <C>            <C>          <C>
Interest on loans                  $   306,800    $  25,834     $  332,634     $   87,794   $   420,428    $  919,890   $1,340,318
Interest on securities                 159,620        6,123        165,743         18,895       184,638       430,555      615,193
Other interest income                    4,795        1,843          6,638          3,931        10,569        32,370       42,939
                                   ------------   ----------    -----------    -----------  ------------   -----------  -----------
    Total Interest Income              471,215       33,800        505,015        110,620       615,635     1,382,815    1,998,450
                                   ------------   ----------    -----------    -----------  ------------   -----------  -----------
Interest on deposits                   175,645       17,159        192,804         40,776       233,580       559,359      792,939
Interest on borrowings                  40,635            -         40,635         14,876        55,511       340,394      395,905
                                   ------------   ----------    -----------    -----------  ------------   -----------  -----------
    Total Interest Expense             216,280       17,159        233,439         55,652       289,091       899,753    1,188,844
                                   ------------   ----------    -----------    -----------  ------------   -----------  -----------
Net Interest Income before
    Provision for loan loss            254,935       16,641        271,576         54,968       326,544       483,062      809,606
Provision for loan loss                 12,775        7,967         20,742          3,700        24,442        49,000       73,442
                                   ------------   ----------    -----------    -----------  ------------   -----------  -----------
Net Interest Income after
    Provision for loan loss            242,160        8,674        250,834         51,268       302,102       434,062      736,164
Noninterest income                      54,180        3,043         57,223         13,203        70,426       145,291      215,717
Noninterest expense                    181,308       11,590        192,898         46,570       239,468       381,145      620,613
                                   ------------   ----------    -----------    -----------  ------------   -----------  -----------
Income before income taxes
    And extraordinary items            115,032          127        115,159         17,901       133,060       198,208      331,268
Income tax provision  (benefit)         45,205         (710)        44,495          4,570        49,065        75,034      124,099
                                   ------------   ----------    -----------    -----------  ------------   -----------  -----------
Income before extraordinary items  $    69,827    $     837     $   70,664     $   13,331   $    83,995    $  123,174   $  207,169
                                   ============   ==========    ===========    ===========  ============   ===========  ===========


Income Before Extraordinary
Items Per Share:
    Basic                          $      1.67         0.75     $     1.64     $     1.33   $      1.59    $     1.15   $     1.80
    Diluted                        $      1.60         0.73     $     1.57     $     1.25   $      1.52    $     1.13   $     1.74

Weighted Average Common
    Shares:
    (in thousands)
    Basic                               41,362        1,120         42,808          9,660        51,985       106,585      114,337
    Diluted                             43,635        1,148         45,081         10,317        54,882       108,613      118,421

</TABLE>


See notes to pro forma financial information.


<PAGE>

<TABLE>
<CAPTION>

Pro forma  Unaudited  Combined  Condensed  Statements of Income For the Year
Ended December 31, 1996 (Dollars in thousands, except per share data)

                                  Hudson         Southern     Pro Forma                  Pro Forma                  Pro Forma
                                    United        Jersey      Combined     JeffBanks      Combined        Dime       Combined
                                ------------- -------------  ------------  -----------  ------------- ------------ -------------
<S>                             <C>           <C>            <C>           <C>          <C>           <C>          <C>
Interest on loans               $    287,671  $     22,441   $   310,112   $   86,145   $    396,257  $   784,109  $  1,180,366
Interest on securities               150,856         6,802       157,658       18,548        176,206      540,252       716,458
Other interest income                  3,987         1,147         5,134        2,407          7,541       26,337        33,878
                                ------------- -------------  ------------  -----------  ------------- ------------ -------------
    Total Interest Income            442,514        30,390       472,904      107,100        580,004    1,350,698     1,930,702
                                ------------- -------------  ------------  -----------  ------------- ------------ -------------
Interest on deposits                 173,521        14,870       188,391       40,248        228,639      531,216       759,855
Interest on borrowings                27,045             -        27,045       11,693         38,738      358,187       396,925
                                ------------- -------------  ------------  -----------  ------------- -----------  -------------
    Total Interest Expense           200,566        14,870       215,436       51,941        267,377      889,403     1,156,780
                                ------------- -------------  ------------  -----------  ------------- ------------ -------------
Net Interest Income before
    Provision for loan losses        241,948        15,520       257,468       55,159        312,627      461,295       773,922
Provision for loan loss               17,140         1,805        18,945       10,115         29,060       41,000        70,060
                                ------------- -------------  ------------  -----------  ------------- ------------ -------------
Net Interest Income after
    Provision for loan losses        224,808        13,715       238,523       45,044        283,567      420,295       703,862
Noninterest income                    40,257         3,246        43,503       10,496         53,999       85,978       139,977
Noninterest expense                  204,679        10,357       215,036       46,222        261,258      352,033       613,291
                                ------------- -------------  ------------  -----------  ------------- ------------ -------------
Income before income taxes            60,386         6,604        66,990        9,318         76,308      154,240       230,548
Income tax provision                  23,490         1,276        24,766        4,238         29,004       49,984        78,988
                                ------------- -------------  ------------  -----------  ------------- ------------ -------------
    Net Income                  $     36,896  $      5,328   $    42,224   $    5,080   $     47,304  $   104,256  $    151,560
                                ============= =============  ============  ===========  ============= ============ =============

Net Income Per Share:
    Basic                       $        .85  $       4.77   $      0.94   $     0.56   $       0.89  $      1.00  $       1.33
    Diluted                     $        .82  $       4.67   $      0.91   $     0.53   $       0.85  $      0.96  $       1.27

Weighted Average Common
    Shares:
    (in thousands)
    Basic                             42,402         1,118        43,840        8,775         52,176      103,742       112,865
    Diluted                           44,990         1,141        46,428        9,247         55,213      109,097       119,035


</TABLE>

See notes to pro forma financial information.


<PAGE>


Notes to Pro Forma Financial Information

(1)      The pro forma  information  assumes the mergers were  consummated as of
         June 30, 1999 for the pro forma unaudited  combined  condensed  balance
         sheet and as of the beginning of each of the periods  indicated for the
         pro forma unaudited  combined  condensed  statements of income. The pro
         forma  information  presented  is  not  necessarily  indicative  of the
         results of  operations  or the combined  financial  position that would
         have resulted had the mergers been  consummated at the beginning of the
         periods indicated,  nor is it necessarily  indicative of the results of
         operations in future  periods or the future  financial  position of the
         combined entities.

(2)      It is assumed  that the merger with  Southern  Jersey will be accounted
         for on a pooling-of-interests  basis, and accordingly,  the related pro
         forma adjustments herein reflect,  where applicable,  an exchange ratio
         of 1.26 shares of Hudson  United common stock for each of the 1,128,081
         shares of Southern  Jersey common stock which were  outstanding at June
         30, 1999.

         Following  consummation  of the merger,  it is anticipated  that Hudson
         United  will sell  substantially  all of the  nonperforming  assets and
         certain  other   identified   loans  of  Southern  Jersey   aggregating
         approximately  $55  million  and  take a  related  charge  of up to $25
         million to write these assets down to their estimated  realizable value
         based upon an accelerated sale process. Anticipated cost savings net of
         expected  merger-related  expense  and  restructuring  charges  are not
         expected  to  be  material  and  therefore  the  pro  forma   financial
         information does not give effect to these items.

         The pro forma  financial  information  was  adjusted  for the  Southern
         Jersey merger by the (i) addition of 1,421,382  shares of Hudson United
         common  stock  with a stated  value of $1.778  per share  amounting  to
         $2,527,217;  (ii)  elimination of 1,307,683  shares of Southern  Jersey
         common  stock  with a stated  value of $1.67  per  share  amounting  to
         $2,183,831;  (iii)  addition of 22,620  shares of Hudson  United common
         stock  amounting  to $40,218 in exchange for  Southern  Jersey's  stock
         options;  (iv)  elimination of 179,602 shares of Southern Jersey common
         stock held in Southern Jersey's treasury at a cost of $3,823,801.

(3)      It is assumed that the merger with JeffBanks will be accounted for on a
         pooling-of-interests  basis,  and  accordingly,  the  related pro forma
         adjustments herein reflect, where applicable, an exchange ratio of 0.95
         shares of Hudson United common stock for each of the 10,583,209  shares
         of JeffBanks common stock which were outstanding at June 30, 1999.

         Anticipated  cost  savings net of expected  merger-related  expense and
         restructuring charges are not expected to be material and therefore the
         pro forma financial information does not give effect to these items.

         The pro forma  financial  information  was adjusted  for the  JeffBanks
         merger by the (i) addition of 10,054,049 shares of Hudson United common
         stock with a stated value of $1.778 per share amounting to $17,876,099;
         (ii) elimination of 10,583,209  shares of JeffBanks common stock with a
         par value of $1.00 per share amounting to $10,583,209.

(4)      It is assumed  that the  merger  with Dime will be  accounted  for on a
         pooling-of-interests  basis,  and  accordingly,  the  related pro forma
         adjustments  herein  reflect,  where  applicable,  an exchange ratio of
         0.585 shares of Dime United  common  stock for each of the  113,539,009
         shares of Dime common stock which were outstanding at June 30, 1999.

         Anticipated cost savings approximate $78 million and are expected to be
         75% phased-in within the first twelve months of closing. Merger-related
         expense and  restructuring  charges are anticipated to be approximately
         $136  million  pre-tax,  $94 million  after tax,  comprised of systems,
         employee,  occupancy,  professional  and other costs and are  presented
         only in the pro forma unaudited combined condensed balance sheet.

         The pro forma financial information was adjusted for the Dime merger by
         the (i) issuance of  117,450,270  shares of the new Dime United  common
         stock with a par value of $.01 per share amounting to $1,174,503;  (ii)
         elimination  of 51,029,949  shares of Hudson United common stock with a
         stated  value of  $1.778  per share  amounting  to  $90,731,249;  (iii)
         elimination of 113,539,009 shares of Dime common stock with a par value
         of  $.01  per  share  amounting  to  $1,135,390;  (iv)  elimination  of
         1,101,306  shares of Hudson United common stock held in Hudson United's
         treasury  at a cost of  $36,504,000  with a stated  value of $1.778 per
         share amounting to $1,958,122;  (v) elimination of 6,713,450  shares of
         Dime common  stock held in Dime's  treasury  at a cost of  $180,480,069
         with a par value of $.01 amounting to $67,135.

(5)      Earnings  per  share  data has  been  computed  based  on the  combined
         historical  income  before  extraordinary  items  applicable  to common
         shareholders  or net income  applicable to common  shareholders of Dime
         United using  historical  weighted  average shares  outstanding for the
         given  period and the common stock  assumed to be issued in  connection
         with the mergers.

(6)      The pro forma  information  presented  above  does not  reflect  Hudson
         United's pending  acquisition of loans and deposits from Advest Bank or
         its pending  acquisition of the assets of Lyon Credit  Corporation.  We
         have  determined  that the Advest and Lyon Credit  acquisitions  do not
         present  significant  acquisitions  in the  context  of the  pro  forma
         financial  information.  For information about Lyon Credit, see "Recent
         Developments  Concerning  Hudson United" on page 14 of this supplement.
         For information about Advest, see "Recent  Developments" on pages 21-24
         of  the  joint  proxy  statement-prospectus.  The  pro  forma  combined
         information  does not include the effect of Dime's pending  acquisition
         of 28 branches of Key Bank,  N.A. In addition,  the pro forma  combined
         information as of June 30, 1999 does not include Dime's  acquisition of
         Citibank's  auto financing unit,  which was consummated  after June 30,
         1999.  Information  regarding the  acquisitions  of certain  assets and
         liabilities  of Key Bank and Citibank  have not been  included  because
         these  acquisitions  do not  present  significant  acquisitions  in the
         context of the pro forma  financial  information  and because  separate
         financial  statements for such assets and  liabilities are not prepared
         by the companies from which such assets and  liabilities  were acquired
         or are to be acquired.



<PAGE>



               INFORMATION ABOUT THE RECONVENED JEFFBANKS MEETING

Date, Time and Place

         The special meeting of JeffBanks shareholders, originally scheduled for
October 1, 1999, was adjourned on that date without any business being conducted
at the meeting  before  adjournment.  The Board of Directors  of  JeffBanks  has
determined to reconvene the adjourned  meeting at the following  date,  time and
place:

              9:00 a.m.
              November 15, 1999
              The Rittenhouse Hotel
              210 West Rittenhouse Square
              Philadelphia, Pennsylvania 19103

No Change in Record Date

         The JeffBanks Board of Directors originally fixed the close of business
on August 10, 1999 as the record  date for the  JeffBanks  meeting.  This record
date has not been changed.  Only holders of record of JeffBanks  common stock at
that time are  entitled to get notice of the meeting and to vote at the meeting.
On the record  date,  there were  10,563,947  shares of  JeffBanks  common stock
outstanding.  Each of those  shares  will be entitled to one vote on each matter
properly submitted to the meeting.

Required Vote

         The  Hudson  United -  JeffBanks  merger  cannot be  completed  without
JeffBanks  shareholder  approval.  Approval and adoption of the Hudson  United -
JeffBanks  merger  agreement  requires the affirmative vote of a majority of the
votes cast at the  JeffBanks  meeting  either in person or by proxy,  provided a
quorum (a majority of JeffBanks'  outstanding  shares) is present.  The required
JeffBanks  shareholder  vote is based on the number of shares which are actually
voted,  rather than the total number of outstanding  shares of JeffBanks  common
stock.  Thus,  if you abstain  from voting or if you don't submit a yellow proxy
card and don't vote in person at the reconvened  JeffBanks meeting,  your action
will have no effect. Also, broker non-votes will have no effect.

New Proxy Cards

         Because  of the  significance  of the  proposed  Hudson  United  - Dime
merger,  Hudson  United and  JeffBanks  determined  that proxies  voted prior to
distribution of this supplement should not be accepted and new proxies should be
solicited.  The white proxy cards  enclosed with the proxy  statement-prospectus
dated  August 13, 1999 will not be accepted at the  JeffBanks  special  meeting.
Accordingly,  your  shares  will be  voted at the  meeting  only if you sign and
return the enclosed yellow proxy card or vote personally at the meeting. We urge
you to execute,  date and return the enclosed  yellow proxy card in the enclosed
postage-paid  envelope  as soon as  possible  to ensure that your shares will be
voted at the reconvened special meeting. You should not send in certificates for
your JeffBanks shares at this time.

             INFORMATION ABOUT THE RECONVENED HUDSON UNITED MEETING

Date, Time and Place

         The special meeting of Hudson United shareholders, originally scheduled
for  September 30, 1999,  was adjourned on that date without any business  being
conducted at the meeting prior to adjournment.  The Board of Directors of Hudson
United has determined to reconvene the adjourned  meeting at the following date,
time and place:

              9:00 a.m.
              November 15, 1999
              The Sheraton Crossroads
              Route 17 North
              Mahwah, New Jersey 07495

No Change in Record Date

         The Hudson  United  Board of  Directors  originally  fixed 3:00 p.m. on
August 13, 1999 as the record date for the Hudson  United  meeting.  This record
date has not been changed.  Only holders of record of Hudson United common stock
at that  time are  entitled  to get  notice  of the  meeting  and to vote at the
meeting.  On the record  date,  there were  38,924,413  shares of Hudson  United
common stock  outstanding.  Each of those shares will be entitled to one vote on
each matter properly submitted to the meeting.

Required Vote

         The Hudson United - JeffBanks merger cannot be completed without Hudson
United  shareholder  approval.  A majority of the shares of Hudson United common
stock  represented  and voting at the  Hudson  United  meeting,  in person or by
proxy, must vote affirmatively in order to approve the Hudson United - JeffBanks
merger  agreement.  The required Hudson United  shareholder vote is based on the
number of shares  which are  actually  voted,  rather  than the total  number of
outstanding  shares of Hudson  United  common  stock.  Thus, if you abstain from
voting or if you don't  submit a blue proxy card and don't vote in person at the
reconvened Hudson United meeting,  your action will have no effect. Also, broker
non-votes will have no effect.

New Proxy Cards

         Because  of the  significance  of the  proposed  Hudson  United  - Dime
merger,  Hudson  United and  JeffBanks  determined  that proxies  voted prior to
distribution of this supplement should not be accepted and new proxies should be
solicited.  The white proxy cards  enclosed with the proxy  statement-prospectus
dated August 13, 1999 will not be accepted at the special meeting.  Accordingly,
your  shares  will be voted at the  meeting  only if you  sign  and  return  the
enclosed  blue  proxy card or vote  personally  at the  meeting.  We urge you to
execute,  date  and  return  the  enclosed  blue  proxy  card  in  the  enclosed
postage-paid  envelope  as soon as  possible  to ensure that your shares will be
voted at the reconvened special meeting.

                                  OTHER MATTERS

         As of the date of this  supplement,  the  JeffBanks  Board of Directors
knows of no other matters to be presented for action by the  shareholders at the
JeffBanks meeting. If any other matters are properly  presented,  however, it is
the intention of the persons  named in the enclosed  proxy to vote in accordance
with their best judgment on such matters.

         As of the date of this supplement, the Hudson United Board of Directors
knows of no other matters to be presented for action by the  shareholders at the
Hudson United meeting. If any other matters are properly presented,  however, it
is the  intention  of the  persons  named  in the  enclosed  proxy  to  vote  in
accordance with their best judgment on such matters.

                                     EXPERTS

         The consolidated  financial  statements of Hudson United as of December
31,  1998  and 1997 and for each of the  years in the  three-year  period  ended
December   31,   1998   have   been    incorporated   by   reference   in   this
proxy-statement-prospectus  and this  supplement and have been audited by Arthur
Andersen LLP, independent public accountants, as indicated in their reports with
respect thereto,  and are included herein in reliance upon the authority of said
firm as experts in accounting and auditing in giving said reports.

         The consolidated  financial  statements of JeffBanks as of December 31,
1998 and 1997 and for each of the three years in the period  ended  December 31,
1998,  included as exhibit 99.4 to Hudson  United's  Current  Report on Form 8-K
filed October 5, 1999, and thereby  incorporated by reference in the joint proxy
statement-prospectus  and this  supplement,  have been audited by Grant Thornton
LLP,  independent  certified  public  accountants,  whose report thereon appears
therein,  and in  reliance  upon such  report of Grant  Thornton  given upon the
authority of such firm as experts in accounting and auditing.

         The consolidated financial statements of Southern Jersey as of December
31,  1998  and 1997 and for each of the  years in the  three-year  period  ended
December 31, 1998, included as exhibit 99.7 to Hudson United's Current Report on
Form 8-K filed  October 5, 1999,  and thereby  incorporated  by reference in the
proxy  statement-prospectus,  this supplement and elsewhere in the  registration
statement, have been audited by Athey & Company, independent public accountants,
and Belfint,  Lyons & Shuman,  P.A.,  as indicated in their reports with respect
thereto, and are included in the proxy statement-prospectus, this supplement and
the  registration  statement  in reliance  upon the  authority  of such firms as
experts in accounting and auditing in giving said reports.

         The consolidated  financial  statements of Dime and its subsidiaries as
of  December  31,  1998 and 1997,  and for each of the  years in the  three-year
period ended  December 31, 1998,  included in Dime's 1998 Annual  Report on Form
10-K and  reproduced as exhibit 99.1 to Hudson  United's  Current Report on Form
8-K filed October 5, 1999 have been  incorporated by reference herein and in the
registration  statement and this  supplement in reliance upon the report of KPMG
LLP,  independent  certified public accountants,  included in Dime's 1998 Annual
Report on Form 10-K and incorporated by reference herein, and upon the authority
of said firm as experts in accounting and auditing.



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