I am trying to find the parents of my great-grandfather, William Chamberlain. He was born in Maine in about 1861. There are two possibilities in the census - one is the son of Aaron Chamberlain & Mary Frances Ordway of Castine, Hancock, Maine. I'm trying to find a probate record for Aaron Chamberlain, who died in 1917, in the hopes that it will mention his son William. Can anyone help?