| Regimental number | 1779 |
| Place of birth | Bunbury, Western Australia |
| Religion | Salvation Army |
| Occupation | Railway guard |
| Address | 38 Campbell Street, Kalgoorlie, Western Australia |
| Marital status | Married |
| Age at embarkation | 38 |
| Height | 5'10.75" |
| Weight | 196 lbs |
| Next of kin | Wife, Mrs Mary Ann Marshall Sinclair, 38 Campbell Street, Kalgoorlie, Western Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Blackboy Hill, Western Australia |
| Rank on enlistment | Private |
| Unit name | 28th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/45/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A64 Demosthenes on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 16th Battalion |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Parents: John and Julie SINCLAIR |
| Discharge date | |
| Other details |
Commenced return to Australia on board HT 'Militiades', 4 May 1917; disembarked Perth, 24 June 1917; discharged (medically unfit), Perth, 26 July 1917. Medals: 1914-15 Star, British War Medal, Victory Medal Death attributed to war service. |
| Date of death | |
| Age at death | 58 |
| Place of burial | Karrakatta Cemetery, Perth, Western Australia |
| Sources | NAA: B2455, SINCLAIR Albert Ernest |