| Regimental number | 982 |
| Place of birth | Warialda New South Wales |
| Other Names | Clifford Simon |
| Religion | Church of England |
| Occupation | Labourer |
| Address | Kurrajong, Boomi, New South Wales |
| Marital status | Single |
| Age at embarkation | 20 |
| Next of kin | Father, J Wallis, Boomi, New South Wales |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 33rd Battalion, C Company |
| AWM Embarkation Roll number | 23/50/1 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A74 Marathon on |
| Rank from Nominal Roll | Corporal |
| Unit from Nominal Roll | 33rd Battalion |
| Fate | Died of wounds |
| Place of burial | Trois-Arbres Cemetery (Plot I, Row T, Grave 40), Steenwerck, France |
| Panel number, Roll of Honour, Australian War Memorial | 123 |
| Miscellaneous information from cemetery records | Parents: Joseph and Catherine WALLIS. |
| Family/military connections | Brother: 896 Lance Corporal Malcolm John WALLIS MM, 33rd Bn, returned to Australia, 11 May 1919. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |