"England and Wales Census, 1871", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VFX9-9YL : 26 April 2019), Emma Clara Benwell in entry for Susan Maria Callow, 1871.
"England and Wales Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q27Z-W8JQ : 13 December 2017), Emma C Benwell in household of Charles Benwell, Isleworth, Middlesex, England; from "1881 England, Scotland and Wales Census," database and images, findmypast (http://www.findmypast.com : n.d.); citing p. 27, Piece/Folio 1338/95, The National Archives, Kew, Surrey; FHL microfilm 101,774,577.