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- [S4] CRI, Sep 1858, Colchester, vol 4a, p202 (Reliability: 3), 23 Nov 2009.
- [S616] UK Census 1891 Bootle, Liverpool, Lancashire, UK RG12-2975-58-56 (Head is Clement Mossop.), (RG12-2975-58-56), RG12-2975-58-56, 5 Apr 1891.
- [S457] UK Census 1901 Walton, Liverpool, Lancashire, UK RG13-3461-63-4 (Head is Clement Mossop.), (RG13-3461-63-4), RG13-3461-63-4, 31 Mar 1901.
- [S323] UK Census 1911 Bootle, Liverpool, Lancashire, UK RG14PN22424 RG78PN1322 RD455 SD5 ED18 SN358 (Head is Clement Mossop.), (RG14PN22424 RG78PN1322 RD455 SD5 ED18 SN358), RG14PN22424 RG78PN1322 RD455 SD5 ED18 SN358, 2 Apr 1911.
- [S4] CRI, Dec 1927, St Asaph, vol 11b, p351 (Reliability: 2), 23 Nov 2009.
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