| Regimental number | 2328 |
| Place of birth | Kerang Victoria |
| Religion | Church of England |
| Occupation | Clerk |
| Address | Havelock Street, West Perth, Western Australia |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, John Fredrick Mullen, National Bank, Perth, Western Australia |
| Enlistment date | 2 August 1915 |
| Rank on enlistment | Provisional Sergeant |
| Unit name | 28th Battalion, 5th Reinforcement |
| AWM Embarkation Roll number | 23/45/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A32 Themistocles on 13 October 1915 |
| Miscellaneous details | True name: Francis Sydney Hamilton MULLEN |
