"England and Wales Census, 1851," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:SGVH-775 : 9 November 2019), Alfred Halverson in household of William Welch, Barking, Essex, England; citing Barking, Essex, England, p. 1, 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.