I don't want to hijack your thread, I find the Dauphin Co, PA to IL connection interesting.
My gggrandmother, Priscilla Rhodes, came to Putnam Co, IL sometime in the early 1850's with her mother, father and siblings. From what I have found, it looks like there was a migration from the Lebanon & Dauphin Counties (and probably some more) in PA to the north-central counties in IL.
I might be able to find some background on the Fischer/Fisher name through a distant cousin of mine that lives in Lebanon County, PA. Give me a shout through email, if you want, and I'll see what he can find.
Larry Gyger
Lsgyger@atlanticbb.net