| Role | Name | Name (original language) | Name (translation) | Floruits |
|---|---|---|---|---|
| Addressor | Edward I, king of England (d.1307) | Edward | Edward, king of England, lord of Ireland and duke of Aquitaine | 1274 × 1312 |
| Addressee | Unknown, sheriff of Berwick (Edward I) | visconte de Berwike | sheriff of Berwick | 1296 × 1304 |
| Bearer of letters | Henry of Gateshead, master | Henri de Gatesheved | Henry of Gateshead | 1298 × 1298 |
| Bearer of letters | John of Ireland, valet | Johan d'Irland | John of Ireland | 1296 × 1304 |