| Regimental number | 5026 |
| Place of birth | Sydney New South Wales |
| Religion | Presbyterian |
| Occupation | Clerk |
| Address | 98 Ebley Street, Waverley, Sydney, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Father, J J Alcock, 98 Ebley Street, Waverley, Sydney, New South Wales |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 3rd Battalion, 16th Reinforcement |
| AWM Embarkation Roll number | 23/20/3 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT SS Makarini on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Battalion |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 6273 Pte Archibald ALCOCK, Machine Gun Details, returned to Australia, 19 February 1919; 4652 Pte Herbert Robert ALCOCK, 19th Bn, returned to Australia, 6 June 1918; 3229 Pte Sydney Stanmore ALCOCK, 50th Bn, returned to Australia, 27 July 1917. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |