| Regimental number | 6867 |
| Place of birth | Perth, Western Australia |
| Religion | Church of England |
| Occupation | Clerk |
| Address | Belmont, Western Australia |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, Joseph William Blacklock, Gilford Road, Belmont, Western Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 28th Battalion, 20th Reinforcement |
| AWM Embarkation Roll number | 23/45/4 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A30 Borda on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 27th Battalion |
| Fate | Returned to Australia |
| Family/military connections | Father: 24396 Driver Joseph William BLACKLOCK, 3rd Divisional Ammunition Column, returned to Australia, 11 January 1918; Brother: 8558 Driver Stanley Edward BLACKLOCK, 4th Field Artillery Brigade, returned to Australia, 6 May 1919. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |