"England and Wales Census, 1881," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q27P-QDKZ : 13 December 2017), Bertha Musgrave in household of James Musgrave, Pendleton, Lancashire, England; from "1881 England, Scotland and Wales Census," database and images, findmypast (http://www.findmypast.com : n.d.); citing p. 1, Piece/Folio 3941/54, The National Archives, Kew, Surrey; FHL microfilm 101,775,122.
"England and Wales Census, 1891," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:7ZPM-VPZ : 23 February 2021), Bertha Musgrave in household of James Musgrave, Pendleton, Lancashire, England, United Kingdom; from "1891 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 12, Lancashire county, subdistrict, The National Archives of the UK, Kew, Surrey.
"England and Wales Census, 1901," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:X9J2-PS6 : 21 May 2019), Bertha Musgrave in household of Thomas Musgrave, Pendleton, Lancashire, England, United Kingdom; from "1901 England, Scotland and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing Pendleton subdistrict, PRO RG 13, The National Archives, Kew, Surrey.
"England and Wales Census, 1911," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:XW13-JKL : 3 May 2019), Bertha Timbs in household of Leonard Timbs, Pendleton, Lancashire, England, United Kingdom; from "1911 England and Wales census," database and images, findmypast (http://www.findmypast.com : n.d.); citing PRO RG 14, The National Archives of the UK, Kew, Surrey.