On 23 Mar 1784 when Seth was 23, he married Abigail Cushing (52114) , daughter of Noah Cushing (35254) (18 Oct 1714-) & Hannah Cushing (40616) (25 Aug 1714-), in Halifax, MA. Born on 28 Feb 1754 in Halifax, MA.2 Abigail died in Sumner, Oxford County, Maine, on 18 Oct 1839; she was 85.