"England and Wales Marriage Registration Index, 1837-2005," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2DBD-Q66 : 13 December 2014), Mary Jackson, 1894; from “England & Wales Marriages, 1837-2005,” database, findmypast (http://www.findmypast.com : 2012); citing 1894, quarter 2, vol. 9D, p. 921, Northallerton, Yorkshire, England, General Register Office, Southport, England.
"England and Wales Census, 1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:X7P5-9W2 : 3 August 2017), Mary Alderson in household of Thomas Thompson Alderson, Middlesbrough, Middlesbrough, Yorkshire (North Riding), England; from "1911 England and Wales census,"
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