| Regimental number | 12603 |
| Place of birth | Adelaide, South Australia |
| Other Names | David Arnold |
| Religion | Church of England |
| Occupation | Hospital attendant |
| Address | Main Street, Eastwood, South Australia |
| Marital status | Married |
| Age at embarkation | 26 |
| Next of kin | Wife, Mrs Amy F Collett, Main Street, Eastwood, South Australia |
| Previous military service | 31st A A S C |
| Enlistment date | 21 January 1916 |
| Rank on enlistment | Private |
| Unit name | 11th Field Ambulance |
| AWM Embarkation Roll number | 26/54/1 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A29 Suevic on 31 May 1916 |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 11th Field Ambulance |
| Fate | Returned to Australia 5 July 1919 |
| Family/military connections | Brothers: 75 Pte Kenneth James COLLETT, Australian Corps Headquarters, returned to Australia, 19 April 1919; 2333 Lance corporal Malcolm Ross COLLETT, 48th Bn, returned to Australia, 1 February 1918. |