I suggest those with families in Adams County, especially those who settled near furnaces, check in Cumberland County, PA for possible ancestors. My HORN family came from the area that is now in Perry County, PA. They were members of the Centre Presbyterian Church there. They moved to Adams County @ 1800. I believe a lot of the members of that church settled in Adams & Highland County, OH. >From the church Rolls of Centre Presbyterian Church from @ 1800 or before, I see the following names: ADAIR, ADAMS, ALEXANDER, CALDWELL, CAMPBELL, CARSON, CLARK, DAVIS, DELZELL, DOUGLAS, DUNBAR, EVERHART, FISHER, GIBSON, HAMILTON, KENNEDY, KINKEAD, LOGAN, MAGILL, MARSHALL, McCLURE, McCORD, McCOY, McMILLEN, MILLER, MORRISON, PATTERSON, ROBINSON, RODDY, ROSS, SCHOTT, SHAW, STEWART, THOMPSON, WILLIAMSON, WILSON and WELCH. There are many others. The Perry County(PA) Historians have a library and a web site. They are very helpful. Good luck, Delsa