Filed pursuant to Rule 424(b)(3)
                                            Registration Statement No. 333-23659

LOGO
                                                  PEI
                                                  Pennsylvania Enterprises, Inc.


                                          This letter amends and supplements the
                                          prospectus   dated  April  23,   1999,
                                          relating    to    the     Pennsylvania
                                          Enterprises,   Inc.  (the   "Company")
                                          Customer   Stock  Purchase  Plan  (the
                                          "Plan")


                                          June 10, 1999



Dear Customer:

            Thank you for your interest in the Customer  Stock  Purchase Plan of
Pennsylvania  Enterprises,  Inc. Our Board of Directors  recently  announced its
approval of a definitive  merger  agreement  with  Southern  Union  Company,  an
international energy company headquartered in Austin, Texas. As a result of this
planned merger,  and after carefully  considering this matter, we have concluded
to  suspend  the  Plan  effective  June 7,  1999.  Therefore,  we are no  longer
accepting  investments  in the Plan and are  returning or refunding  any amounts
sent to us in connection with the investment  period ending June 30, 1999. If we
received your investment prior to June 7, 1999, a Pennsylvania Enterprises, Inc.
refund check is enclosed.  If we received  your  investment  on or after June 7,
1999, your personal check or money order is enclosed.

            If  circumstances  change and if the Company  determines  that it is
desirable  to  reinstate  the  Plan,   the  Company  will  notify  the  eligible
participants   accordingly.   Once  again,   thank  you  for  your  interest  in
Pennsylvania Enterprises, Inc. and the Customer Stock Purchase Plan.

                                          Very truly yours,

                                          /s/ Thomas F. Karam

                                          Thomas F. Karam
                                          President and Chief Executive Officer

ONE PEI CENTER
WILKES-BARRE, PA  18711-1801