| Regimental number | 24/22 |
| Address | High School, Gisborne |
| Marital status | Single |
| Next of kin | Father, J G A Castle, 26 Sydney Street, Petone, Lower Hutt |
| Rank on embarkation | 2nd Lieutenant |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, New Zealand Rifle Brigade, 2nd Battalion, C Company |
| Embarkation details | Unit embarked from Wellington on board HMNZT 31 Tahiti on |
| Final rank | Lieutenant |
| Final unit | 2nd Battalion, New Zealand Rifle Brigade |
| Fate | Killed in Action |
| Age at death from cemetery records | 25 |
| Place of burial | Caterpillar Valley Cemetery (Plot X, Row C, Grave No 23), Longueval, Somme, France |
| Miscellaneous information from cemetery records | Parents: John and Mary Castle, 26 Sydney Street, Petone, New Zealand. Also served in Egypt. |
| Miscellaneous details | Nominal Roll Vol. 1: C Company/2nd NZRB |