| Role | Name | Name (original language) | Name (translation) | Floruits |
|---|---|---|---|---|
| Addressor | Edward I, king of England (d.1307) | R | The king | 1274 × 1312 |
| Addressee | John of Argyll/Lorn (son of Alexander) (d. 1316) | Jehan d'Ergail | John of Argyll | 1304 × 1309 |
| Bearer of letters | Unknown, valet (1) of John of Argyll | voz valletz | your valets | 1304 × 1304 |
| Bearer of letters | Unknown, valet (2) of John of Argyll | voz valletz | your valets | 1304 × 1304 |