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Sources
"England and Wales Census, 1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XWCF-XW6 : 6 July 2019), Catherine McDonald Harrison in household of Joseph Harrison, Monkton, Durham, England, United Kingdom; from "1911 England and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 14, The National Archives of the UK, Kew, Surrey.