I think I know your Samuel Briggs.He's the son of Solomon and Lydia Rounds Briggs and was a twin of Noah (b. July 2, 1780), sons of Solomon and Lydia Rounds Briggs. They lived near Brattleboro, VT.My info is from my interviewing of my grandmother in 1956, and is a bit sketchy and incomplete.
Samuel married 3 times and had 21!!! children.First wife was Phebe Akeley.They had 7 children and Phebe and the seventh died in childbirth, Feb 24, 1815 in Plymouth, VT.Samuel had 14 more children by his other two wifes: 1st. Philena (Filetta?) Churchill (Crowinshield?) and 2nd. Cynithia Fairbanks (Forman?).The latter family moved to Warren Co, PA in 1851.Among their children were Ellen, Maria, Eliza, Lodusky, and John Forman-my notes beside his name say "Averill, Midland Co, MI".This sounds like your John Foreman Briggs.
Tell me about your family.I'm in the process of putting about 500 pages of the Akeley-Briggs families on a GEDCOM to share.