IV. One or two instructions about individuals.
But our brother and fellow bishop, Julian, and the clergy who adhered to Flavian of holy memory, rendering him faithful service, we wish to adhere to you also beloved, that they may know him who we are sure lives by the merits of his faith with our God to be present with them in you. We wish you to know this too, beloved, that our brother and fellow bishop Eusebius, who for the Faith's sake endured many dangers and toils, is at present staying with us and continuing in our communion; whose church we would that your care should protect, that nothing may be destroyed in his absence, and no one may venture to injure him in anything until he come to you bearing a letter from us. And that our or rather all Christian people's affection for you may be stirred up in greater measure, we wish this that we have written to you, beloved, to come to all men's knowledge, that they who serve our God may give thanks for the consummation of the peace of the Apostolic See with you. But on other matters and persons you will be more fully instructed, beloved, by the letter you will have received through our delegates. Dated 13 April, in the consulship of the illustrious Adelfius (451).
Source: Letters (New Advent)