Interesting.I know where this town is.I think I've been there before a long time ago when we used to camp at this campground outside of Coolville. This is in Troy Twp., which is not all that far from Washington County.Belpre is just across the county line.
Our library has cemetery transcriptions for Troy Twp.I will check with FindAGrave but I will probably check at the libary when I go back next Mon or Tues.
I have Thompson in my line, by the way.My line came from Morristown, NJ.
I will check for Samuel and his son.But I am afraid that maybe they may not have had a marker(s).But you never know.