| Regimental number | 1600 |
| Place of birth | Townsville, Queensland |
| Religion | Roman Catholic |
| Occupation | Drover |
| Address | Eyre Street, North Ward Townsville, Queensland |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, C O'Callaghan, Eyre Street, North Ward Townsville, Queensland |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 9th Battalion, 3rd Reinforcement |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A49 Seang Choon on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 9th Battalion |
| Fate | Died of disease |
| Age at death from cemetery records | 24 |
| Place of burial | Baghdad (North Gate) War Cemetery (Angora Memorial No. 125), Iraq |
| Panel number, Roll of Honour, Australian War Memorial | 57 |
| Miscellaneous information from cemetery records | Parents: Crosby and Sarah O'CALLAGHAN |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
