4 surviving letters between Firminus and Sidonius Apollinaris, spanning 455-472 AD.
You demand, my dear son, that my pen break through the boundary of the earlier letters and push onward into fresh...
You insist, my dear son, that my pen should break through the boundary of the earlier letters and push on into new...
If you recall, my dear son, you had asked that this ninth book — specially composed for you — be added to the eight...
If you recall, my dear son, you had charged me with the task of joining this ninth book, dedicated especially to...