At this late date I hope this reaches you. Thompson Smith is supposed to be buried in about the third row. If they had tombstones they are below ground. Thompson died in 1821 and Rachel later. They had nine children beginning with Martha, born in 1771 in New Jersey, Mary, Eleazer, Rachel, Leah, Jacob, Moses, Thompson and finally John Henry, born in 1793. I descend from the last two(my grandparents did not know that they were distant cousins!) I have a solid DNA match with another cousin descended from Eleazer(third child, oldest male of Thompson and Rachel).
I hope to take photographs and maybe check closer for Thompson and Rachel's stones.
Don Smith
geowhiz1@gmail.com