| Regimental number | 645 |
| Place of birth | St Heliers, Jersey |
| School | St Heliers Parvchial School, Jersey |
| Age on arrival in Australia | 20 |
| Religion | Church of England |
| Occupation | Stockman |
| Address | Jersey, Channel Isles, England |
| Marital status | Single |
| Age at embarkation | 22 |
| Next of kin | Henry James Underhill, Jersey, Channel Isles, England |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 2nd Light Horse Regiment, 1st Reinforcement |
| AWM Embarkation Roll number | 10/7/2 |
| Embarkation details | Unit embarked from Sydney, New South Wales, on board HMAT A42 Boorara on |
| Rank from Nominal Roll | Sapper |
| Unit from Nominal Roll | 2nd Light Horse Regiment |
| Fate | Killed in Action |
| Miscellaneous details (Nominal Roll) | *Spelt Richard Mallett Underhill on NR |
| Place of death or wounding | Gallipoli, Turkey |
| Age at death | 23.6 |
| Age at death from cemetery records | 23 |
| Place of burial | Shrapnel Valley Cemetery (Plot III, Row F, Grave No. 12), Gallipoli |
| Panel number, Roll of Honour, Australian War Memorial | 3 |
| Miscellaneous information from cemetery records | Parents: Henry James and Esther Mallett UNDERHILL, 10 Val Plaisant, St. Helier, Jersey, Channel Islands |
| Other details |
War service: Egypt, Gallipoli Medals: 1914-15 Star, British War Medal, Victory Medal |