↑ England and Wales General Register Office GRO Online Index Birth (https://www.gro.gov.uk/gro/content) for Harrison, Annie. Mother's maiden name Cassels GRO Reference: 1879 M Quarter in South Shields Volume 10A Page 759 General Register Office, Southport, England (Accessed June 21 2021)
↑ England and Wales General Register Office GRO Online Index Birth (https://www.gro.gov.uk/gro/content) for Chambers, John William. Mother's maiden name Harrison GRO Reference: 1905 D Quarter in Newcastle-upon-Tyne Volume 10B Page 90 General Register Office, Southport, England (Accessed June 21 2021)
↑ England and Wales General Register Office GRO Online Index Birth (https://www.gro.gov.uk/gro/content) for Chambers, Margaret Sanderson. Mother's maiden name Harrison GRO Reference: 1913 M Quarter in Newcastle-upon-Tyne Volume 10B Page 159 (Accessed June 21 2021)