On 12 Nov 1779 when Seth was 24, he married Mary Hatch (45062) , daughter of Israel Hatch (39714) (8 Aug 1730-5 Mar 1809) & Mary Hatch (25747) (25 Dec 1731-22 Dec 1802), in Marshfield, MA. Born on 7 Apr 1758 in Marshfield, MA. Mary died in Pembroke, MA, on 20 Jun 1835; she was 77. Marriage intention published on 13 Mar 1779 at Scituate, MA.52

Mary, also known as Molly. She was of Pembroke when she amrried Seth.52

On 9 Oct 1788 when Marcy was 26, she married Alden Briggs Esq. (44732) , son of Seth Briggs (37632) (28 Aug 1721-23 Jul 1801) & Abigail Church (25334) (11 Feb 1726-3 Nov 1795), in Pembroke, MA.395 Born on 14 Mar 1763 in Pembroke, MA.395 Alden died in Pembroke, MA, on 21 Mar 1849; he was 86.395 Buried in Briggs Cemetery, North Pembroke. Occupation: farmer, shipbuilder, blacksmith.

Alden was a farmer, a shipbuilder, and an expert iron worker, and as such was especially in demand by his brothers Enos and Daniel at Salem and Milton. He built vessels at the Brick Kiln yard, at first in company with his brother Elisha, who later removed to Newburyport. Alden then conducted building at the Brick Kiln yard for himself when not employed by his brothers elsewhere, and built in company with others at the yard in Pembroke as late as 1832.42

Alden “was an interesting man, and some amusing incidents are told of him. One of his peculiarities was that of adding compound interest, from year to year, to the original cost of his possessions, so that instead of depreciating, their value became increased. By this reckoning, he valued his watch at one time at over @2,000, and his anvil at about $1,500.”42