"England and Wales Census, 1851," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:SGTL-KKZ : 11 September 2019), Mary Ann Parsson in household of Thomas Parsson, Trevethin, Monmouthshire, Wales; citing Trevethin, Monmouthshire, Wales, p. 23, from "1851 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO HO 107, The National Archives of the UK, Kew, Surrey.