BAPTISMS solemnized in the Parish of
Kennington
in the County of
Surrey
in the Year 1852
| When Baptised | March 26 | |
| Born | 15 February 1843 | |
| No. | 1328 | |
| Child's Christian Name | William | |
| Parent's Name | Christian |
William Edwin
Harriet |
| Surname | Coster | |
| Abode | 5 White Hart Street | |
| Quality, Trade, or Profession | Chocolate Maker (Deceased) | |
| By Whom the Ceremony was performed | W. Sparrow Simpson | |
Brother, Edwin, baptised on the same date.
Source: London Metropolitan Archives, Saint Mark, Kennington, Register of baptisms, P85/MRK, Item 006
Source: Ancestry.com. London, England, Births and Baptisms, 1813-1906