| | Nelson David William Mercer 1918–1973 | | | | David Crofton Mercer 1890–1980 Lilian (Lily) Emily Mary Patching 1888–1964 | | | | David Miller Mercer 1868–… Alice Mary Hermine Crofton 1857–… | | |
| | | William Patching 1860–1937 Emily Mary-Ann Keary 1864–1925 | | | | William George Patching 1838–1883 Sarah Ann Langford 1838–1886 | | |
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