|Place of birth||Sheffield, Tasmania|
|Age at embarkation||20|
|Next of kin||Father, Thomas Cock, Sheffield, Tasmania|
|Previous military service||Served for 1 year in the 26th Australian Light Horse Regiment, Citizen Military Forces; still serving at time of AIF enlistment.|
|Place of enlistment||Claremont, Tasmania|
|Rank on enlistment||Private|
|Unit name||40th Battalion, A Company|
|AWM Embarkation Roll number||23/57/1|
|Embarkation details||Unit embarked from Hobart, Tasmania, on board HMAT A35 Berrima on
|Rank from Nominal Roll||Private|
|Unit from Nominal Roll||40th Battalion|
|Fate||Returned to Australia
|Family/military connections||Brother: 1010 Pte James Alfred COCK, 40th Bn, returned to Australia, 27 May 1919.|
War service: Western Front
Embarked Hobart, 1 July 1916; disembarked Devonport, England, 22 August 1916.
Admitted to Military Hospital, Devonport, 22 August 1916 (arthritis, right hip: slight); discharged to Command Depot, Perham Downs, 4 January 1917, and granted furlough to 16 February 1917.
Proceeded overseas to France, 23 August 1917; taken on strength, 40th Bn, in the field, 1 September 1917.
Admitted to 10th Australian Field Ambulance, 25 February 1918 (influenza); transferred to 1st Australian Casualty Clearing Station, 1 March 1918; discharged to duty, 15 March 1918, and rejoined Bn, in the field.
Admitted to 10th Australian Field Ambulance, 18 March 1918 (trench fever), and transferred to New Zealand Stationary Hospital, Wisques; to No 9 Canadian General Hospital, 24 March 1918; to England, 22 April 1918, and admitted to 3rd Southern General Hospital, Oxford (trench fever: slight); transferred to 3rd Australian Auxiliary Hospital, Dartford, 3 May 1918; discharged to No 4 Command Depot, Hurdcott, 17 May 1918.
Marched in to Overseas Training Brigade, Longbridge Deverill, 8 July 1918.
Proceeded overseas to France, 22 August 1918; rejoined Bn, in the field, 26 August 1918.
Detached to SOS School as batman, 2 September 1918; rejoined Bn, 15 September 1918.
Admitted to 10th Australian Field Ambulance, 29 December 1918 (venereal disease), and transferred to 39th General Hospital; to England, 9 January 1919, and admitted to 1st Australian Dermatological Hospital, Bulford, 11 January 1919 (gonorrhoea); discharged to Convalesecent Training Depot, Parkhouse, 1 May 1919; total period of treatment for venereal disease: 124 days.
Marched in to No 3 Group, Codford, 13 May 1919.
Commenced return to Australia on board HT 'Rio Padro', 27 May 1919; disembarked Hobart, 21 July 1919; discharged (termination of period of enlistment), 13 September 1919.Medals: British War Medal, Victory Medal
|Sources||NAA: B2455, COCK William|