| Regimental number | 3137 |
| Place of birth | Yass New South Wales |
| Other Names | Cyril Gregory |
| Religion | Methodist |
| Occupation | Horse breaker |
| Address | Dutton Street, Yass, New South Wales |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, William Dyball, Dutton Street, Yass, New South Wales |
| Previous military service | 43rd Infantry |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 55th Battalion, 8th Reinforcement |
| AWM Embarkation Roll number | 23/72/4 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A29 Suevic on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 35th Battalion |
| Fate | Returned to Australia |
| Family/military connections | Brothers: 2646 Pte Charles Henry DYBALL, 56th Bn, returned to Australia, 23 June 1919; 1524 Corporal William James DYBALL, 3rd Bn, returned to Australia, 8 October 1915. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |