Árvore interativa de Stuart James Sweet
1975–♂ Stuart James Sweet
1942–♂ David Henry Sweet
1948–♀ Christine Susan Roydhouse
–♂ … Sweet
–♀ … Cook
1911–1985♂ Lewis Roydhouse
1915–1986♀ Mary Garland
1886–1963♂ Arthur Roydhouse
1887–1976♀ Eliza Nicholson
1891–1979♂ Harold Storey Garland
–♀ Mary Susan Sands