Just visited "The State of Maine Genealogical Society"
https://maineroots.org/
This site has a lot of information for people with Maine ancestors. They sell books of vital records by area or county.
I also visited the "State of Maine Cemetery Association"
https://www.moca-me.org/
This is a great site, which lists all the cemeteries in Maine. They sell a disk for $20.00 from a Marble company that lists all their customers, what the stone said, who paid for it. and where the stone was delivered to. This is a gold mine for people with Maine ancestors the Marble company started in the mid 1800's.
Taylor
