"England and Wales Census, 1861," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M7PY-NF8 : 12 September 2020), Mary Ann Isherwood in household of Thomas Isherwood, Blackburn, Lancashire, England, United Kingdom; from "1861 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 9, The National Archives, Kew, Surrey.
"England and Wales Census, 1871", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KZPK-W4P : 20 January 2022), Mary Ann Isherwood in entry for Charles Isherwood, 1871.
"England and Wales Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q275-295G : 13 December 2017), Mary Ann Smith in household of Thomas Isherwood, Blackburn, Lancashire, England; from "1881 England, Scotland and Wales Census," database and images, findmypast (http://www.findmypast.com : n.d.); citing p. 15, Piece/Folio 4198/55, The National Archives, Kew, Surrey; FHL microfilm 101,775,186.
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