"Canada Census, 1871," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:M47M-131 : 24 October 2018), John Green, Manvers, Durham, Ontario, Canada; citing 1871; citing National Archives of Canada, Ottawa, Ontario.
"Canada Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MVXY-T7Q : 20 May 2019), John Green, Verulam, Peterborough, Ontario, Canada; from "1881 Canadian Census." Database with images. Ancestry. (www.ancestry.com : 2008); citing John Green, citing Library and Archives Canada, Ottawa, Ontario.
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