| Regimental number | 13188 |
| Place of birth | Renfrew, Scotland |
| Religion | Presbyterian |
| Occupation | Clerk |
| Address | North Perth, Western Australia |
| Marital status | Single |
| Age at embarkation | 34 |
| Height | 5' 6.5" |
| Weight | 134 lbs |
| Next of kin | Brother, E B Sinclair, Comstock Gold Mine, Randalls, Western Australia |
| Previous military service | Yes A+S Highlanders Vol Bn 4 years resigned. |
| Enlistment date | |
| Place of enlistment | Perth, Western Australia |
| Rank on enlistment | Private |
| Unit name | Army Medical Corps, Special Reinforcements |
| AWM Embarkation Roll number | 26/99/2 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, on board HMAT A63 Karoola on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 3rd Field Ambulance |
| Fate | Returned to Australia |
| Miscellaneous information from cemetery records | Parents: Archibald and Catherine SINCLAIR |
| Discharge date | |
| Other details |
Commenced return to Australia on board HT 'A38', 10 September 1917; disembarked 'Ulysses', Perth, 4 Novemeber 1917; discharged (medically unfit), Perth, 26 November 1917. Medals: British War Medal, Victory Medal Death attributed to war service. |
| Date of death | |
| Age at death | 56 |
| Place of burial | Karrakatta Cemetery, Perth, Western Australia |
| Sources | NAA: B2455, SINCLAIR Neil James |