You mention Emma Foster. Are you familiar with the "Foster-Livingston Collection"? Seems like an expansion, beyond the Gilead Cemetery Register, to many cemeteries in Putnam county. The annotated graveyard registers for Putnam county were prepared by Emma Foster and Julia Livingston and have a fair amount of useful genealogical information. They were published in "Early Settlers of New York" in the late 1930s, which is available on-line on "Genealogy.Com".