Google brings up a few scattered news articles and other factoids on this site. For example:
http://www.lowelldeeds.com/blog/index.php/2008/02/22/claypit-cemetery leads to
Ms. Duda was the teacher who brought her class to the site when I was there yesterday. This article points to:
http://www.primaryresearch.org/pr/index.php?option=com_content&view=article&id=581&Itemid=300070 which is a very comprehensive website containing a lot of great information on the cemetery that Ms. Duda has compiled. Go here.
Since I don't really have anything of value to ad, here's the pictures I took. We had just unearthed Aaron Colburn's gravemarker that day. Some of the articles off of primaryreasearch.org say that this stone was visible in a 4' hole (a grave-robbing attempt) in the early 1990s. My understanding is these were purposefully buried to protect them, after decades of vandalism and said attempted grave-robbings (no, nothing will be left of the bodies of people that died that long ago and were put in wood boxes unembalmed...).