Res Gestae
Ammianus Marcellinus
Ammianus Marcellinus. Ammianus Marcellinus, with an English translation, Vols. I-III. Rolfe, John C., translator. Cambridge, MA; London: Harvard University Press; W. Heinemann, 1935-1940 (printing).
At the time when Magnentius, whom your valorous deeds overthrew, was obstinately bent upon making general confusion in the state, I raised my cousin Gallus to the high rank of Caesar and sent him to defend the Orient. When he by many deeds abominable to witness and to rehearse had forsaken the path of justice, he was punished by the laws’ decree.