| Regimental number | 1636 |
| Date of birth | |
| Place of birth | Reading, England |
| School | England and New South Wales |
| Religion | Church of England |
| Occupation | Farmer |
| Address | 101 South Terrace, Adelaide, South Australia |
| Marital status | Married |
| Age at embarkation | 33 |
| Next of kin | Wife, Mrs Sarah Forbes Duppuy, same address |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 43rd Battalion, 1st Reinforcement |
| AWM Embarkation Roll number | 23/60/2 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A19 Afric on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 43rd Battalion |
| Other details from Roll of Honour Circular | Father: the late Rev. C.R. DUPPUY, Jamberoo, New South Wales |
| Fate | Returned to Australia |
| Discharge date | |
| Family/military connections | Brother: Chaplain Charles R. DUPPUY, 10th Bde, British Expeditionary Force (b. Newcastle, NSW, 21 September 1880; educ. NSW, St Edmund's School, Canterbury, England, and Keble College Oxford; home secretary, Church Missionary Society; enlisted 1 March 1918; embarked 18 March 1918; war service: France, Belgium); Sister: Nurse Marguerite DUPPUY (b. Jamberoo, NSW, 9 June 1891; educ. England; enlisted October 1914; war service: University College Hospital, London; contracted pneumonic influenza, 23 October 1919; died, 29 October 1919.) |
| Other details |
War service: Western Front Contracted trench fever; invalided to Wimmereux and Colchester Hospitals, England; recovered and returned to duty. Arrived back in Australia, 11 November 1919. Medals: British War Medal, Victory Medal |