AGREEMENT --------- This Agreement is made as of the 30th day of June, 1998 between the Louise B. Tollefson Revocable Trust dated 12/23/1997 (the "Trust") and Louise B. Tollefson ("Tollefson"). The Parties hereto hereby agree that a single, joint...

EXHIBIT 1

                                    AGREEMENT
                                    ---------


         This  Agreement is made as of the 30th day of June,  1998  between  the
Xxxxxx X. Xxxxxxxxx Revocable Trust dated 12/23/1997 (the "Trust") and Xxxxxx X.
Xxxxxxxxx ("Xxxxxxxxx").

         The  Parties  hereto  hereby  agree  that  a  single,  joint  statement
containing  the  information  required  by  Schedule  13D under  the  Securities
Exchange  Act of 1934 with  respect  to the  beneficial  ownership  of shares of
Common  Stock of NYMAGIC,  Inc., a New York  corporation,  may be filed with the
Securities and Exchange Commission on behalf of each of the Trust and Xxxxxxxxx.

         IN WITNESS WHEREOF,  the parties hereto have executed this Agreement as
of the date first written above.


                                            XXXXXX X. XXXXXXXXX REVOCABLE TRUST
                                            DATED 12/23/97


                                            By: /s/ Xxxxxx X. Xxxxxxxxx
                                               ---------------------------------
                                               Xxxxxx X. Xxxxxxxxx
                                               Trustee


                                                /s/ Xxxxxx X. Xxxxxxxxx
                                               ---------------------------------
                                               Xxxxxx X. Xxxxxxxxx