|Date of birth|
|Place of birth||Barraba, New South Wales|
|Religion||Church of England|
|Address||62 Fitzroy Street, Surry Hills, Sydney, New South Wales|
|Age at embarkation||18|
|Next of kin||Mother, Mrs Emily Sinclair, 62 Fitzroy Street, Surry Hills, Sydney, New South Wales|
|Previous military service||Nil|
|Date of enlistment from Nominal Roll|
|Rank on enlistment||Private|
|Unit name||12th Light Horse Regiment, 23rd Reinforcement|
|AWM Embarkation Roll number||10/17/3|
|Embarkation details||Unit embarked from Sydney, New South Wales, on board SS Canberra on
|Rank from Nominal Roll||Private|
|Unit from Nominal Roll||12th Light Horse Regiment|
|Fate||Returned to Australia
|Family/military connections||Brother: 3194 Driver Arthur Collin SINCLAIR, Anzac Mounted Divisional Train, returned to Australia, 10 July 1919.|
War service: embarked from Sydney, 16 November 1917; disembarked Suez, Egypt, 21 December 1917.
Taken on strength, 4th Light Horse Training Regiment, Moascar, 2 April 1918.
Taken on strength, 12th Light Horse Regiment, 23 April 1918. Admitted to hospital, Gaza, 28 May 1918 (malaria); transferred to 14th Australian General Hospital, Port Said, 7 June 1918; to Rest Camp, 26 July 1918; rejoined 12th Light Horse Regiment, 4 November 1918.
Commenced return to Australia on board 'Port Sydney', 5 March 1919; arrived Melbourne, 11 April 1919; discharged, 30 June 1919.
Medals: British War Medal, Victory Medal
|Date of death|
|Age at death||89|
|Place of burial||Forest Lawn Cemetery, Leppington, New South Wales|