Supposedly one of my ancestors-Thomas Smith and wife Abigail are buried in a family plot in "the Sudbury Cemetery" (date of death 1727-1730). When I pull up cemeteries in Sudbury I find around 23. How do I figure out which one they are in. Supposedly it is mentioned in Epitaphs in Old Burial Ground, Sudbury Mass but I don't know how to access it. I am flying up on Wednesday and would like to know where to look before I get up there. Also where are records kept that are not in the Commonwealth Museum and State Archives.