| Date of birth | |
| Place of birth | Clare, South Australia |
| Religion | Presbyterian |
| Occupation | Medical practitioner |
| Address | Crystal Brook, South Australia |
| Marital status | Married |
| Age at embarkation | 32 |
| Height | 6' 3.75" |
| Weight | 167 lbs |
| Next of kin | Wife, Mrs W M Sinclair, Crystal Brook, South Australia |
| Enlistment date | |
| Rank on enlistment | Captain |
| Unit name | No 1 Australian General Hospital |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board A62 Wandilla on |
| Rank from Nominal Roll | Captain |
| Unit from Nominal Roll | Australian Army Medical Corps |
| Promotions |
Captain Unit: 1st Australian General Hospital Promotion date:
Unit: 3rd Field Ambulance |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Egypt, Gallipoli Commenced return to Australia from Suez on board HS 'Karoola', 4 November 1915; appointment terminated (discharged), 7 April 1916. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Sources | NAA: B2455, SINCLAIR William Malcolm |