| Regimental number | 26 |
| Religion | Roman Catholic |
| Occupation | Brickmaker |
| Address | Lipson Street, Port Adelaide, South Australia |
| Marital status | Single |
| Age at embarkation | 27 |
| Next of kin | Father, Henry O'Callaghan, Lipson Street, Port Adelaide, South Australia |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 10th Battalion, Machine Gun Section |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board Transport A11 Ascanius on |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 31st Machine Gun Battalion |
| Fate | Returned to Australia |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
