| Regimental number | 2221 |
| Place of birth | Sydney New South Wales |
| Religion | Baptist |
| Occupation | Clerk |
| Address | 16 Edward Street, Petersham, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Father, W F Santleben, 16 Edward Street, Petersham, New South Wales |
| Enlistment date | 4 July 1915 |
| Rank on enlistment | Private |
| Unit name | 20th Battalion, 4th Reinforcement |
| AWM Embarkation Roll number | 23/37/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A8 Argyllshire on 30 September 1915 |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 2nd Pioneer Battalion |
| Fate | Returned to Australia 26 September 1917 |
| Miscellaneous details (Nominal Roll) | *Given name Harold |
| Family/military connections | Brother: 17831 Pte Harry Baker SANTLEBEN, 14th Field Artillery Ambulance, returned to Australia, 7 July 1919. |