I am also researching Gardner briggs b. 29 Jan 1796 Otsego Co. New York. d. 25 Sept 1855 in Fort Atkinson Wisconson. He married Selinda Sheldon dau of Isaac Sheldon and Lydia Dowd. Gardner was the brother of Griffin Briggs who m. Susannah Parsons.
Gardner's daughter Eunice briggs married Griffin's son- they were cousins. John Parmley Briggs.
Gardner and Griffin were the sons of Lt. Michael Briggs and Sarah Greene. Anyone researching these names can email me at firstname.lastname@example.org.My grandma comes from this line via. William E briggs & Hendrika Veefkind. Wm the son of Aaron Griffen Briggs and Lydia Schofield. Aaron G. the son of John Parmley and Eunice Briggs.