| Regimental number | 3786 |
| Place of birth | Rockley New South Wales |
| Religion | Roman Catholic |
| Occupation | Linesman |
| Address | Triangle Flat, Rockley, New South Wales |
| Marital status | Single |
| Age at embarkation | 30 |
| Next of kin | Brother, P J Byrnes, Wattle Grove, Rockley, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 18th Battalion, 9th Reinforcement |
| AWM Embarkation Roll number | 23/35/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A54 Runic on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | Australian Corps Signal Company |
| Fate | Returned to Australia |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |