You know, your post made me revisit this question. I can't recall where I heard that but just thinking about the ancestors - I don't know about you but my farmers and day laborers probably couldn't afford headstones. Many of the earliest immigrants to NH (1880-1900 or so) are buried in NH but not recorded on the more recent headstones. The state certificate says that's where they were buried, but there's no stone. I've been told and also have seen some metal markers and wooden markers, and they just wouldn't hold up in the elements. So maybe the bodies are there - decomposed and others later buried right there. I googled a bit and couldn't find anything definitive, but I will keep looking.