| Sources |
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- [S1447] _Births, Deaths and Marriages, NSW, John S Alsop; Birth; Index; 8357; 1885; Newtown.
- [S1395] Sydney, Australia, Anglican Parish Registers, 1814-2011 [A], Baptism; John Sydney Alsop; 26 July 1885; Newtowm, St Stephen; Page 67; No. 930; 15 June 2025.
- [S1442] _Births, Deaths and Marriages, Victoria, John Sidney Alsop; Death; Index; 25959; 196; Nagambie.
- [S1377] Liverpool, England, Church of England Marriages and Banns, 1754-1935 [A], Marriage; William White Alsop + Mary Ann Clark; 10 September 1878; Liverpool; Page 8; No. 15; 7 June 2023.
- [S1442] _Births, Deaths and Marriages, Victoria, John Sidney Alsop + Violet May Bennett; Marriage; Index; 516; 1918.
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