| Date of birth | |
| Place of birth | Geelong Victoria |
| Religion | Presbyterian |
| Occupation | Farmer |
| Address | Kyogle, New South Wales |
| Marital status | Single |
| Age at embarkation | 25 |
| Next of kin | Father, William John Mackrell, Kyogle, New South Wales |
| Enlistment date | |
| Rank on enlistment | Lieutenant |
| Unit name | 11th Light Horse Regiment, 3rd Reinforcement |
| AWM Embarkation Roll number | 10/16/2 |
| Embarkation details | Unit embarked from Brisbane, Queensland, on board HMAT A55 Kyarra on |
| Embarkation details | Unit embarked from Adelaide, South Australia, on board HMAT A15 Star Of England on |
| Rank from Nominal Roll | Lieutenant |
| Unit from Nominal Roll | 2nd Light Horse Regiment |
| Promotions |
Lieutenant Unit: 2nd Light Horse Regiment Promotion date: |
| Fate | Returned to Australia |
| Other details |
Medals: 1914-15 Star, British War Medal, Victory Medal |