On 29 Nov 1770 when Joseph was 23, he married Mercy Hitchcock (45500) , daughter of Samuel Hitchcock (26381) (5 Nov 1713-8 Jul 1788) & Mary Perkins (33899) (12 Jun 1715-), in First Congregational Society, New Haven.55 Born on 12 Jul 1750 in New Haven, CT.56 Mercy died in Hamden, CT, on 9 Jul 1773; she was 22.55 Buried in Centerville Cemetery, Hamden.