| Lilian Emmeline Robertsbetween July 1874 and September 1874 | |
| Cecil George Robertsbetween October 1876 and December 1876 | |
| Kate Winifred Robertsbetween October 1876 and December 1876 | |
| Edward John Branscombe Robertsbetween January 1880 and March 1880 | |
| Reginald Chave Robertsbetween April 1881 and June 1881 | |
| Margaret Eleanor Robertsbetween July 1882 and September 1882 | |
| Edith Mary Robertsbetween April 1884 and June 1884 | |
| Ethel Gertrude Robertsbetween October 1885 and December 1885 | |
| Violet Eveline Robertsbetween January 1887 and March 1887 | |