On 28 Oct 1779 when Joshua was 24, he first married Mercy Couillard in Georgetown, Sagadahoc County, Maine. Born on 7 Feb 1761 in Georgetown, Sagadahoc County, Maine. Mercy died in Bath, Sagadahoc County, Maine, on 12 Sep 1800; she was 39.
Mercy, daughter of Charles and Margaret (Hood) Couillard.