| Regimental number | 612 |
| Place of birth | Mitiamo, Victoria |
| School | Terrick South State School, Victoria |
| Religion | Methodist |
| Occupation | Farmer |
| Address | Terrick South, Mitiamo, Victoria |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, Hugh Mullen, Mitiamo, Victoria |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 14th Battalion, E Company |
| AWM Embarkation Roll number | 23/31/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board A38 Ulysses on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 14th Battalion |
| Other details from Roll of Honour Circular | First Australian soldier to die in England. |
| Fate | Died of wounds |
| Place of death or wounding | Gallipoli, Turkey |
| Age at death | 23 |
| Age at death from cemetery records | 23 |
| Place of burial | Birmingham (Lodge Hill) Cemetery (B10. 295), Warwickshire |
| Panel number, Roll of Honour, Australian War Memorial | 73 |
| Miscellaneous information from cemetery records | Parents: Hugh and Mary MULLEN, Terrick Street, Via Mitiamo, Victoria |
| Family/military connections | Brother of David killed 13/10/17. |
| Other details |
War service: Egypt, Gallipoli Medals: 1914-15 Star, British War Medal, Victory Medal |