| Regimental number | 155 |
| Place of birth | Smith Mills Western Australia |
| Religion | Roman Catholic |
| Occupation | Labourer |
| Address | Katanning, Western Australia |
| Marital status | Single |
| Age at embarkation | 18 |
| Next of kin | Father, William R Seymour, Katanning, Western Australia |
| Enlistment date | 20 February 1915 |
| Date of enlistment from Nominal Roll | 12 April 1915 |
| Rank on enlistment | Private |
| Unit name | 28th Battalion, A Company |
| AWM Embarkation Roll number | 23/45/1 |
| Embarkation details | Unit embarked from Fremantle, Western Australia, |
| 30 Officers and 982 Other Ranks embarked at Fremantle on HMAT A11 'Ascanius' on 29 June 1915; 12 others embarked at Fremantle on HMAT A36 'Thirty-Six' on 12 July 1916. From Embarkation Records it is not possible to distinguish the latter 12. |
| Rank from Nominal Roll | Sergeant |
| Unit from Nominal Roll | 28th Battalion |
| Fate | Returned to Australia 8 March 1919 |
| Miscellaneous details (Nominal Roll) | *Given name Henry Lionel |
