Augustine of Hippoc. 412
1. Our brother Barbarus, the bearer of this letter, is a servant of God, who has now for a long time been settled at Hippo, and has been an eager and diligent hearer of the word of God. He requested from us this letter to your Holiness, whereby we commend him to you in the Lord, and convey to you through him the salutations which it is our duty ...
augustine hippo, Letter 159