| Regimental number | 1139 |
| Date of birth | |
| Place of birth | Brisbane Qld |
| Religion | Roman Catholic |
| Occupation | Secretary |
| Address | Toowong, Queensland |
| Marital status | Single |
| Age at embarkation | 42 |
| Next of kin | Sister, Miss Amanda Horstmann, Ascog Terrace, Toowong, Queensland |
| Previous military service | 15 years active service in South Africa; member of the Toowong Rifle Club. |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | Australian Naval & Military Expeditionary Force, Reinforcements from March, 1915, to May, 1919 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board SS Makambo on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | Australian Naval & Military Expeditionary Force |
| Fate | Returned to Australia |
| Discharge date | |
| Family/military connections | Brother: 5030 Gunner Herbert Vere HORSTMANN, 3rd Field Artillery Brigade, killed in action, 31 August 1918. |
| Other details |
War service: embarked for Rabaul from Brisbane, 16 September 1917. Arrived Rabaul, 4 October 1917, and posted to A Company. Found guilty, 1 September 1918, of being absent from church parade. Punishment: to be on all parades for the next 7 days; to execute all fatigues; to report to the CSM on defaulters' call; to be excluded from beer parades. Found guilty, 28 June 1919, of striking his superior officer and of using insubordinate language: awarded 42 days' detention. Commenced return to Australia on board 'Melusia', 5 August 1919; disembarked Brisbane, 19 August 1919; discharged, 23 November 1919. Medal: British War Medal |