5 surviving letters between Joannes and Synesius of Cyrene, spanning 404-412 AD.
I have come to your assistance many times before.
If you want to live without fear, you should fear the law.
One should use the friendship of the powerful, but not abuse it.
Do not ask for great things.
To Joannes [a mutual friend who, after illness left him unfit for military service, entered a monastery].