| Regimental number | 2623 |
| Place of birth | Pyramid Hill Victoria |
| Religion | Church of England |
| Occupation | Rubber vulcanizer |
| Address | Elsternwick, Victoria |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, Joseph Walter Ladson, 29 Shoobra Road, Elsternwick, Victoria |
| Enlistment date | 17 November 1917 |
| Date of enlistment from Nominal Roll | 16 November 1917 |
| Rank on enlistment | 2nd Air Mechanic |
| Unit name | Special Draft 2 |
| AWM Embarkation Roll number | 8/15/2 |
| Embarkation details | Unit embarked from Melbourne, Victoria, on board HMAT A38 Ulysses on 22 December 1917 |
| Rank from Nominal Roll | 2nd Air Mechanic |
| Unit from Nominal Roll | 6th Squadron, Australian Flying Corps |
| Fate | Returned to Australia 6 May 1919 |
| Miscellaneous details (Nominal Roll) | *Spelt Harold Walter Ladson on NR |
