Nicene and Post-Nicene Fathers, Ser. II, Vol. XII:
The Letters and Sermons of Leo the Great.: To Julian, Bishop of Cos, and Aetius, the Presbyter.

Letter CXLVII.

To Julian, Bishop of Cos, and Aetius, the Presbyter.

(Charging him to uphold the acts of Chalcedon, and to help in choosing a good successor to Proterius.)