| Regimental number | 39069 |
| Date of birth | |
| Place of birth | Wanderah, South Australia |
| Religion | Methodist |
| Occupation | Grocer |
| Address | Crystal Brook, South Australia |
| Marital status | Single |
| Age at embarkation | 23.6 |
| Height | 5' 10.5" |
| Weight | 134 lbs |
| Next of kin | Father, Charles John Estick, Crystal Brook, South Australia |
| Previous military service | Served for 2 years in the Machine Gun Section (Citizen Military Forces?); previously rejected for enlistment on the grounds of 'medically unfit). |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Place of enlistment | Adelaide, South Australia |
| Rank on enlistment | Gunner |
| Unit name | Field Artillery Brigade, Reinforcement 33 |
| AWM Embarkation Roll number | 13/128/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board SS Indarra on |
| Rank from Nominal Roll | Driver |
| Unit from Nominal Roll | 3rd Field Artillery Brigade |
| Fate | Returned to Australia |
| Discharge date | |
| Family/military connections | Brother; 6743 Lance Corporal Sydney William ESTICK, 10th Bn, killed in action, 30 May 1918. |
| Other details |
War service: Western Front Commenced return to Australia on board HT 'Konig Frederich August', 20 June 1919; disembarked Melbourne, 6 August 1919, for onward travel to Adelaide; discharged (termination of period of enlistment), Adelaide, 30 August 1919. Medals: British War Medal, Victory Medal |
| Date of death | |
| Age at death | 64 |
| Place of burial | AIF Cemetery, West Terrace Cemetery, Adelaide, South Australia |
| Sources | NAA: B2455, ESTICK Gilbert Victor |