"England and Wales Census, 1871", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:VB64-J66 : 11 December 2017), Margaret Nicholls in entry for William Nicholls, 1871.
"England and Wales Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q27S-RJKK : 8 December 2017), Margaret Nicholls in household of William Nicholls, Bow Aka St Mary Stratford-Le-Bow, London,Middlesex, England; from "1881 England, Scotland and Wales Census," database and images, findmypast (http://www.findmypast.com : n.d.); citing p. 12, Piece/Folio 493/67, The National Archives, Kew, Surrey; FHL microfilm 101,774,278.
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