"England and Wales Census, 1901," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:X9ZF-WD9 : 20 May 2019), Eleanor Usher in household of Elizabeth Cock, Hampstead, London, England, United Kingdom; from "1901 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing Hampstead subdistrict, PRO RG 13, The National Archives, Kew, Surrey.