| Regimental number | 1680 |
| Place of birth | Yatina, South Australia |
| School | Yatala Public School, South Australia |
| Religion | Methodist |
| Occupation | Farm labourer |
| Address | Yatina via Tongala, South Australia |
| Marital status | Single |
| Age at embarkation | 19.4 |
| Height | 5' 8.25" |
| Weight | 133 lbs |
| Next of kin | Father, James Daniel Jeffs, Yatina via Yongala, South Australia |
| Previous military service | Nil |
| Enlistment date | |
| Place of enlistment | Orroroo, South australia |
| Rank on enlistment | Private |
| Unit name | 48th Battalion, 2nd Reinforcement |
| AWM Embarkation Roll number | 23/65/3 |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A60 Aeneas on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 48th Battalion |
| Fate | Died whilst a Prisoner of War |
| Place of death or wounding | Bullecourt, France |
| Age at death from cemetery records | 20 |
| Place of burial | Vis-En-Artois British Cemetery (Plot XI, Row D, Grave No. I), Haucourt, France |
| Panel number, Roll of Honour, Australian War Memorial | 146 |
| Miscellaneous information from cemetery records | Parents: James and Mary JEFFS, Yatina, South Australia |
| Family/military connections | Brother: 1681 Corporal Henry Richard JEFFS MM, 48th Bn, returned to Australia, 2 June 1919. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |
| Sources | NAA: B2455, JEFFS Clarence |