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- [S1447] _Births, Deaths and Marriages, NSW, Ethel Supple; Birth; Index; 21591; 1889; Grenfell.
- [S1213] Rookwood Necropolis [SAG], Anglican: Section 8 Row 24, No. 196694.
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- [S1395] Sydney, Australia, Anglican Parish Registers, 1814-2011 [A], Marriage; John Leslie Allsopp + Ethel Supple; 19 June 1922; Marrickville, St Clement; Page 95; No. 185; 15 June 2025.
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