| Regimental number | 2245 |
| Place of birth | Crystal Brook, South Australia |
| Religion | Church of England |
| Occupation | Labourer |
| Address | Crystal Brook, South Australia |
| Marital status | Single |
| Age at embarkation | 36 |
| Height | 5'10.75" |
| Weight | 145 lbs |
| Next of kin | Mother, Mrs Annie M Sinclair, Crystal Brook, South Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Port Augusta, South Australia |
| Rank on enlistment | Private |
| Unit name | 48th Battalion, 4th Reinforcement |
| AWM Embarkation Roll number | 23/65/3 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A70 Ballarat on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 48th Battalion |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Parents: Allen and Annie Maria SINCLAIR |
| Discharge date | |
| Other details |
War service: Western Front Commenced return to Australia on board HT 'Plassy', 17 March 1919; disembarked Adelaide, 27 April 1919; discharged (termination of period of enlistment), Adelaide, 5 June 1919. Medals: British War Medal, Victory Medal |
| Date of death | |
| Age at death | 48 |
| Place of burial | AIF Cemetery, West Terrace Cemetery, Adelaide, South Australia |
| Sources | NAA: B2455, SINCLAIR Donald William |