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                                                                    EXHIBIT 24.2

                            POWER OF ATTORNEY
                           BANCFIRST OHIO CORP.


     The Company appoints Gary N. Fields, James H. Nicholson, John R. Thomas
and Amy M. Shepherd and all four of them, any of whom may act without the
joinder of the others as its true and lawful attorney-in-fact and agent, with
full power of substitution and resubstitution for it, and in its stead, in all
capacities to sign any and all amendments, including post-effective amendments
to this Registration Statement, and to file the same with the Securities and
Exchange Commission, granting unto said attorney-in-fact and agent full power
and authority to do and perform each and every act and thing requisite and
necessary to be done, as fully to all intents and purposes as it might or could
do in person, hereby ratifying and confirming that all said attorney-in-fact
and agent or their substitute or substitutes may lawfully do or cause to be
done by virtue hereof.

                                       BANCFIRST OHIO CORP.

Dated: June 18, 1996                   By:  /s/ Gary N. Fields
                                          ---------------------------------
                                            Gary N. Fields, President