Nicene and Post-Nicene Fathers, Ser. II, Vol. XII:
The Letters and Sermons of Leo the Great.: Letter LXII. toLXIV.

(Letters LXII., LXIII., LXIV., are the Emperor Theodosius’ answers (a) to Valentinian, (b) to Galla Placidia, and (c) to Licinia Eudoxia (assuring them of his orthodoxy and care for the Faith.)