| Regimental number | 3194 |
| Place of birth | Barraba, New South Wales |
| Religion | Church of England |
| Occupation | Greengrocer |
| Address | 62 Fitzroy Street, Surry Hills, New South Wales |
| Marital status | Single |
| Age at embarkation | 21 |
| Next of kin | Mother, Mrs. E. Sinclair, 62 Fitzroy Street, Surry Hills, New South Wales |
| Previous military service | Nil |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 6th Light Horse Regiment, 25th Reinforcement |
| AWM Embarkation Roll number | 10/11/4 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A42 Boorara on |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | Anzac Mounted Division Train |
| Fate | Returned to Australia |
| Family/military connections | Brother: 2629 Pte William James SINCLAIR, 12th Light Horse Regiment, returned to Australia, 12 March 1919. |
| Other details |
War service: Middle East Disembarked Suez, 20 June 1917 (suffering from venereal disease); admitted to 26th Stationary Hospital, Ismailia, 21 June 1917; transferred to 14th General Hospital, Cairo, 23 June 1917; discharged, 8 July 1917. Total treatment for venereal disease: 19 days. Transferred to Australian Army Service Corps Divisional Train, Moascar, 29 July 1917. Appointed Driver, 13 August 1917. Marched out to No. 2 company, Australian Mounted Divisional Train, 20 August 1917; transferred to Headquarters, AMDT, 24 August 1917. Appointed Lance Corporal, 1 September 1918. Commenced return to Australia from Kantara on board HT 'Oxfordshire', 10 July 1919; disembarked Sydney, 17 August 1917; discharged, 18 September 1919. Medals: British War Medal, Victory Medal |