-- If you go to this web page http://users.penn.com/~tshu/genealogy.html Scroll down to Pa maps and clck that you will get the page with maps showing the counties of Pa since 1718 through 1820....there are 8 of them there...When I found it the other day it I began to understand when someone said "No that was in Allegheney Co at that that time..ect..." meaning that being able to see it as it was at the time period explained it to me easier... Sharon tx