There is a burial entry at the Old Baptist Church of Ann Colson on 17 May 1846 that tallies with the death index in Wellingborough RD in June 1846. So if Ann is Elizabeth Burgess's mother - assumed to be Ruth Colson, who was admitted into Baptist Church on 4 Oct 1791 then we're looking for marriage of a male Colson to an Ann born c 1761 prior to this ? As Ruth married William Burgess in 1802 she must have been born prior to her admission to Baptist church in 1791. Also William was born 1768 so I would expect wife Ruth so be born 1775 onwards