(Between 1756/1757-Bef 1798)
In the burial register her surname (and that of her infant son, John) is given as Wagner, so there is some doubt about her date of death. However, there are no other possible burials and her age at death (41) would make sense.
Sarah married Isaac Wagland, son of Philip Wagland and Anne Gosden, on 11 Oct 1779 in St. Andrew's (Holborn) Church, 5 St. Andrew Street, London, EC4A 3AB, GB. (Isaac Wagland was born between 2 May 1757 and 1 May 1758, baptised on 22 Jul 1759 in All Saints' Church, High Street, Carshalton, Sutton, SM5 3PD, GB,1 died before 1 May 1813 and was buried on 1 May 1813 in St. Nicholas's Church, Church Lane, Tooting Graveney, Wandsworth, London, SW17 9PP, GB.)
1 The Church of Jesus Christ of Latter-day Saints, "FamilySearch Family Tree," database, FamilySearch (http://www.familysearch.org).