| Regimental number | 821 |
| Date of birth | |
| Place of birth | Evandale, Tasmania |
| School | Evandale State School, Tasmania |
| Religion | Church of England |
| Occupation | Cordial manufacturer |
| Address | Evandale, Tasmania |
| Marital status | Single |
| Age at embarkation | 32 |
| Next of kin | Father, James Duffy, Evandale, Tasmania |
| Enlistment date | |
| Rank on enlistment | Private |
| Unit name | 40th Battalion, D Company |
| AWM Embarkation Roll number | 23/57/1 |
| Embarkation details | Unit embarked from Hobart, Tasmania, on board HMAT A35 Berrima on |
| Rank from Nominal Roll | Lance Corporal |
| Unit from Nominal Roll | 40th Battalion |
| Other details from Roll of Honour Circular | Name recorded as Erskin James Hilton DUFFY on Roll of Honour Circular. |
| Fate | Killed in Action |
| Place of death or wounding | Mericourt, France |
| Age at death | 31 |
| Age at death from cemetery records | 34 |
| Place of burial | Mericourt L'Abbe Communal Cemetery Extension (Plot II, Row F, Grave No. 15), France |
| Panel number, Roll of Honour, Australian War Memorial | 58 |
| Miscellaneous information from cemetery records | Parents: James and Margaret DUFFY, Evandale, Tasmania |
| Family/military connections | Brother: 3513 Sapper Bernard Montrose DUFFY, Australian Corps Engineers Troop, returned to Australia, 13 April 1919. |
| Other details |
War service: Western Front Medals: British War Medal, Victory Medal |