Hi Martha, It's been a while since I heard from you!
I visited the southern half of Madison Co. TN in August of 2000, and sought out all the cemeteries I could find in the area. Shady Grove, where Wm F. and Sarah are buried as well as Mercer, Hays Chapel and a few others. On a map of the area there is a creek named Pennycost that I'm sure was named for our ancestors. It looked as though the road by Shady Grove had been widened and perhaps some graves "lost" in the process. I had hoped to find the grave of Wm F.'s oldest daughter, Margaret. I'd like to know what happened to her.