| Regimental number | 10/1133 |
| Date of birth | |
| Place of birth | Westport |
| Other Names | Athal Byrt Wilfred |
| Religion | Roman Catholic |
| Occupation | Fireman NZ Railways |
| Address | Thorndon Quay, Wellington |
| Marital status | Single |
| Age at embarkation | 20.7 |
| Height | 5' 11" |
| Weight | 154 lbs |
| Next of kin | Father, W Mather, 7 Lancaster Street, Linwood, Christchurch |
| Previous military service | Served for 18 months in the Invercargill City Guards; serving in New Zealand Railway Engineers, Territorial Force, at time of NZEF enlistment. |
| Enlistment date | |
| Place of enlistment | Awapuni |
| Rank on embarkation | Private |
| Enlistment status | Volunteer |
| Unit name | New Zealand Expeditionary Force, Main Body, Wellington Infantry Battalion |
| Embarkation details | Unit embarked from Wellington on board HMNZT 10 Arawa on |
| Final rank | Private |
| Final unit | Wellington Mounted Rifles Regiment |
| Fate | Died of wounds |
| Age at death from cemetery records | 21 |
| Place of burial | Cairo War Memorial Cemetery (Row M, Grave No 73), Egypt |
| Miscellaneous information from cemetery records | Parents: the late William F. and M.A. Mather |
| Other details |
War service: Egypt, Gallipoli Wounded in action, 27 April 1915 (gunshot wound, right thigh); admitted to No.1 Australian General Hospital, Heliopolis, 2 May 1915; reported dangerously ill, 30 May 1915; still dangerously ill, 5 July 1915; removed from Dangerously Ill List, 12 July 1915; reported dangerously ill, 3 August 1915; removed from Dangerously Ill List, 3 September 1915. Died of septic wound, thigh, and exhaustion, 3rd Auxiliary Hospital, Heliopolis, 27 September 1915. Medals: 1914-15 Star, British War Medal, Victory Medal |
| Miscellaneous details | Nominal Roll Vol. 1: Wellington Infantry Batln/Main Body |
| Sources | Archives New Zealand (Wellington), Agency AABK, Series 18805, File 21373615 |