| Regimental number | 2280 |
| Place of birth | Sheffield, Tasmania |
| School | State School, Tasmania |
| Religion | Methodist |
| Occupation | Farmer |
| Address | Sulphur Creek, Tasmania |
| Marital status | Single |
| Age at embarkation | 23 |
| Next of kin | Father, D Duff, Sulphur Creek, Tasmania |
| Previous military service | Served with the Mounted Cadets, 3rd Light Horse Regt. |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 15th Battalion, 6th Reinforcement |
| AWM Embarkation Roll number | 23/32/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A31 Ajana on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 15th Battalion |
| Fate | Killed in Action |
| Miscellaneous details (Nominal Roll) | *Spelt Sidney John Duff on NR |
| Place of death or wounding | Gallipoli, Turkey |
| Date of death | |
| Age at death | 23 |
| Age at death from cemetery records | 23 |
| Place of burial | No. 2 Outpost Cemetery (Row F, Grave No. 11), Gallipoli, Turkey |
| Panel number, Roll of Honour, Australian War Memorial | 75 |
| Miscellaneous information from cemetery records | Parents: David and Emily jane DUFF, Sulphur Creek, Tasmania. Native of Sheffield, Tasmania |
| Family/military connections | Four cousins served, three were killed and one died of sickness. |
| Other details |
War service: Egypt, Gallipoli Medals: 1914-15 Star, British War Medal, Victory Medal |
Postal Address:
Po Box 7916
Canberra BC 2610, Australia
Street Address:
Northcott Drive,
Campbell, ACT 2600
