4 surviving letters between Apollinaris and Sidonius Apollinaris, spanning 467 AD.
I thoroughly approve, rejoice, and admire that out of love for purity you shun the company of dissolute men —...
CLAUDIANUS TO THE LORD POPE SIDONIUS, GREETINGS
Through Bishop Faustinus — a man bound to me by the fellowship of our old comradeship no less than by our shared...
It would be only fair to curb my loquacity with the same silence you have imposed on me.