Nicene and Post-Nicene Fathers, Ser. II, Vol. XII:
Early Church Fathers
The Letters and Sermons of Leo the Great.: To the Same Julian, Bishop of Cos.
To the Same Julian, Bishop of Cos.
(In which, after speaking of his own efforts for the Faith, he objects to monks being permitted to preach, especially if heretically inclined, and asks Julian to stir up the Emperors zeal for the Faith.)
Next: To Maximus, Bishop of Antioch, by the hand of Marian the Presbyter, and Olympius the Deacon.