| Regimental number | 1856 |
| Place of birth | London England |
| Religion | Church of England |
| Occupation | Steward |
| Address | 63 William Street, Newport, Victoria |
| Marital status | Single |
| Age at embarkation | 24 |
| Next of kin | Father, Henry Coster, 52 Trinity Square, Brixton, London, England |
| Enlistment date | 27 July 1915 |
| Rank on enlistment | Private |
| Unit name | 4th Light Horse Regiment, 13th Reinforcement |
| AWM Embarkation Roll number | 10/9/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A54 Runic on 20 January 1916 |
| Regimental number from Nominal Roll | 1856A |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 5th Divisional Signal Company |
| Fate | Returned to Australia 22 May 1919 |
