"England and Wales Census, 1891," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:3RHH-CW2 : 10 December 2017), Margaret Mechings Johnson in household of Harriett Elizabth Dudgeon, Islington, London, England; from "1891 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 12, London county, subdistrict, The National Archives of the UK, Kew, Surrey.
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