On 7 Apr 1767 when Stephen was 23, he married Mercy Darling, daughter of David Darling (4 May 1705-29 Dec 1784) & Ruth Sampson (11 Jul 1716-23 Sep 1763), in Pembronke, MA. Born ca 1747 in Pembroke, MA. Mercy died in Buckfield, Oxford County, Maine on 25 Jan 1809.