| Regimental number | 22247 |
| Place of birth | Mansfield, Victoria |
| Religion | Church of England |
| Occupation | Student |
| Address | 'Risdon', Alma Road, St Kilda, Victoria |
| Marital status | Single |
| Age at embarkation | 18 |
| Height | 5' 9" |
| Weight | 140 lbs |
| Next of kin | Father, Alexander Topp, 99 Queen Street, Melbourne, Victoria |
| Previous military service | Served in the Senior Cadets, Melbourne Grammar School. |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Place of enlistment | Melbourne, Victoria |
| Rank on enlistment | Bombardier |
| Unit name | Howitzer Brigade 23, Battery 109 |
| AWM Embarkation Roll number | 13/133/1 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A7 Medic on |
| Rank from Nominal Roll | Gunner |
| Unit from Nominal Roll | 7th Field Artillery Brigade |
| Fate | Returned to Australia |
| Discharge date | |
| Other details |
War service: Western Front Embarked Melbourne, 20 May 1916; reverted to Gunner, 17 July 1916; disembarked Plymouth, England, 18 July 1916. Proceeded overseas to France, 31 December 1916; taken on strength, 7th Field Artillery Brigade, 6 January 1917, and posted to 27th Battery. On leave to Paris, 7 October 1917; rejoined unit from leave, 18 October 1917. On leave to United Kingdom, 21 October 1918; rejoined unit from leave, 11 November 1918. Marched out to England, 30 April 1919, for return to Australia; marched in to No 2 Group, Sutton Veny, 7 May 1919. Commenced return to Australia on board HT 'Karmala' 1 July 1919; disembarked Melbourne, 17 August 1919; discharged (termination of period of enlistment), Melbourne, 2 October 1919. Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, TOPP John Desmond |