| Regimental number | 778 |
| Place of birth | Petersham New South Wales |
| Religion | Church of England |
| Occupation | Farmer |
| Address | 'Westerham', Blangowie, Petersham Street, New South Wales |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Brother, Francis H. Lack, as above |
| Enlistment date | 30 November 1914 |
| Rank on enlistment | Private |
| Unit name | 7th Light Horse Regiment, 3rd Reinforcement |
| AWM Embarkation Roll number | 10/12/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A1 Hymettus on 8 February 1915 |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 10th Field Artillery Brigade |
| Fate | Returned to Australia 14 December 1918 |