| Religion | Church of England |
| Occupation | Station manager |
| Address | Euroa, Victoria |
| Marital status | Single |
| Age at embarkation | 35 |
| Next of kin | Brother, C G Locke, Richardson Street, Essendon, Victoria |
| Enlistment date | 26 July 1915 |
| Rank on enlistment | Lieutenant |
| Unit name | 4th Light Horse Regiment, 10th Reinforcement |
| AWM Embarkation Roll number | 10/9/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A70 Ballarat on 9 September 1915 |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 4th Light Horse Regiment |
| Fate | Returned to Australia 22 July 1917 |
| Miscellaneous details (Nominal Roll) | *Stated to be Harold Harthacunt Locke on NR |