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).
These arrangements made, he himself, learning not long afterwards of the death of Constantius, hastily traversed Thrace and entered Constantinople. And being often advised that the said siege would be long rather than formidable, he assigned Immo with his other officers to that task and then ordered Jovinus to go and attend to other matters of greater urgency.