| Regimental number | 12/1616 |
| Other Names | William Wallace |
| Address | Frankton Junction |
| Marital status | Single |
| Next of kin | Father, James Duff, 434 Princes Street, Dunedin |
| Rank on embarkation | Private |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, 3rd Reinforcements, Auckland Infantry Battalion |
| Embarkation details | Unit embarked from Wellington on board HMNZT 4 Tahiti on |
| Final rank | Private |
| Final unit | 1st Battalion, Auckland Infantry Regiment |
| Fate | Killed in Action |
| Age at death from cemetery records | 30 |
| Place of burial | No known grave |
| Commemoration details | Caterpillar Valley (New Zealand) Memorial, Longueval, France |
| Miscellaneous information from cemetery records | Parents: James and Christina Duff, 434 Princes Street, Dunedin. Native of Waikouai |
| Other details |
War service: Egypt, Gallipoli, Western Front Medals: 1914-15 Star, British War Medal, Victory Medal |
| Miscellaneous details | Nominal Roll Vol. 1: Auckland Infantry Batln/Third |