Henry DOW & Mary EMERY of Maine

Henry Dow & Mary Emery were m 5 June 1771 in Ipswich, MA.Had the following children (The Book of Dow): Joseph, Thomas, Henry, Robert, Moses, John, Catherine, Mary Ann, and Edna. Where were these children born and who were Mary's parents?Also who was Henry's wife, Ruth, mentioned in his Rev War pension application (1820)? Henry lived in Wiscasset & Boothbay, ME.