"England and Wales Marriage Registration Index, 1837-2005," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:2DQ1-NHD : 13 December 2014), Reuben Blackwell, 1859; from "England & Wales Marriages, 1837-2005," database, findmypast (http://www.findmypast.com : 2012); citing 1859, quarter 1, vol. 7B, p. 467, Shardlow, Derbyshire, England, General Register Office, Southport, England.
"England and Wales Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q27K-LBCQ : 12 December 2017), Reuben Blackwell, Stapleford (Nottingham), Derbyshire, England; from "1881 England, Scotland and Wales Census," database and images, findmypast (http://www.findmypast.com : n.d.); citing p. 39, Piece/Folio 3391/99, The National Archives, Kew, Surrey; FHL microfilm 101,774,990.
"England and Wales Census, 1891," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:467V-PPZ : 11 December 2017), Mary Blackwell in household of Reuben Blackwell, Stapleford, Derbyshire, England; from "1891 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 12, Derbyshire county, subdistrict, The National Archives of the UK, Kew, Surrey.
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