| Regimental number | 982 |
| Place of birth | Fairfield, New South Wales |
| School | The King's School, Parramatta, New South Wales |
| Religion | Church of England |
| Occupation | Grazier |
| Address | 'Ingera', Homebush Road, Homebush |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Father, A F Jacob, 'Ingera', Homebush Road, Homebush |
| Enlistment date | |
| Date of enlistment from Nominal Roll | |
| Rank on enlistment | Private |
| Unit name | 1st Light Horse Regiment, 5th Reinforcement |
| AWM Embarkation Roll number | 10/6/2 |
| Embarkation details | Unit embarked from Newcastle, New South Wales, on board HMAT A41 Bakara on |
| Rank from Nominal Roll | Private |
| Unit from Nominal Roll | 1st Light Horse Regiment |
| Fate | Died of self-inflicted injuries |
| Miscellaneous details (Nominal Roll) | *Spelt Harry Alan Jacob on NR |
| Age at death | 25.10 |
| Age at death from cemetery records | 25 |
| Place of burial | Cairo War Memorial Cemetery (Row Q, Grave No. 85), Egypt |
| Panel number, Roll of Honour, Australian War Memorial | 2 |
| Miscellaneous information from cemetery records | Parents: Albert and Maude JACOB, "Ingera", Homebush Road, Homebush, New South Wales |
| Family/military connections | "Brother of Frank Birkbeck JACOB. Major. Divisional Artillery. Mentioned in dispatches" as provided by father. |