| Regimental number | 2834 |
| Place of birth | Teetulpa, South Australia |
| Religion | Roman Catholic |
| Occupation | Porter, South Australian Railways |
| Address | Mt. Barker Junction, South Australia |
| Marital status | Single |
| Age at embarkation | 28.5 |
| Height | 5' 6.25" |
| Weight | 156 lbs |
| Next of kin | Mother, Mrs Ellen Hennessy, Olary, South Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Adelaide, South Australia |
| Rank on enlistment | Private |
| Unit name | 43rd Battalion, 6th Reinforcement |
| AWM Embarkation Roll number | 23/60/2 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A35 Berrima on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 43rd Battalion |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Western Front Commenced return to Australia on board HT 'Osterley', 31 January 1918; discharged (medically unfit: shell shock), Adelaide, 14 October 1918. Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, HENNESSY John |