"England and Wales Census, 1861," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M7JF-J68 : 3 March 2021), Mary H Mathews in household of Mary Kay, Chesham, Buckinghamshire, England, United Kingdom; from "1861 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 9, The National Archives, Kew, Surrey.
Find a Grave, database and images (https://www.findagrave.com/memorial/211926186/mary-henrietta-matthews : accessed 15 October 2021), memorial page for Mary Henrietta Key Matthews (12 Aug 1819–20 Dec 1899), Find A Grave: Memorial #211926186, citing St. Leonard Churchyard, Chesham Bois, Chiltern District, Buckinghamshire, England ; Maintained by Gary M1309 (contributor 47044092) .
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