5 surviving letters between Faustus of Riez and Sidonius Apollinaris, spanning 457-475 AD.
Your eloquence and your devotion alike maintain their accustomed standard, and for this reason we admire your speech...
You have complained, most holy sir, that we have both been silent too long.
Faustus, bishop, to the most beloved and reverend Sidonius.
Sidonius, bishop, to the most blessed and holy Faustus.
I am sending you, at last, the completed treatise on grace that I have been working on for longer than I care to admit.