Nicene and Post-Nicene Fathers, Ser. II, Vol I:
The Life of Constantine with Orations of Constantine and Eusebius.: Chapter LXIII

Chapter LXIII.—How Constantine sent a Messenger and a Letter concerning Peace.

As soon as the emperor was informed of these facts, which he heard with much sorrow of heart, considering them in the light of a calamity personally affecting himself, he forthwith selected from the Christians in his train one whom he well knew to be approved for the sobriety and genuineness of his faith, 3211 and who had before this time distinguished himself by the boldness of his religious profession, and sent him to negotiate peace 3212 between the dissentient parties at Alexandria. He also made him the bearer of a most needful and appropriate letter to the original movers of the strife: and this letter, as exhibiting a specimen of his watchful care over God’s people, it may be well to introduce into this our narrative of his life. Its purport was as follows.

Footnotes

[Hosius, bishop of Cordova.—Bag.] Hosius had already been for some time a trusted adviser, having acted for Constantine also in the Donatist matters. Compare on Hosius the full article of Morse in Smith and Wace.

By “acting as umpire.”