Mary Foster, d/o Nathaniel Foster and Mercy Thacher, b. 1736, m. 1757 Thomas Foster of Marshfield. Will of Nathaniel Foster of Middleboro, dated 7 May 1791, probated 20 Nov 1793, mentions daughter "Mary Foster". Thomas Foster, s/o Thomas, b. Marshfield 4 May 1735, m. 1757 Mary Foster.