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).
When the tribune had fearlessly set out to execute these orders, Julian, since the season of the year was favourable, called together his soldiers from all quarters for a campaign, and set forth; and he thought that above all things he ought betimes to attend to this, namely, before the heat of battle to enter the cities long since destroyed and abandoned, regain and fortify them, and even build granaries in place of those that had been burned, in which he could store the grain which was regularly brought over from Britain; and both things were accomplished sooner than anyone expected.
For not only did the granaries quickly rise, but a sufficiency of food was stored in them; and the cities were seized, to the number of seven: Castra Herculis,[*](Apparently a fortress on the Rhine.) Quadriburgium,[*](Schenkenschanz.) Tricensima[*](Kellen, also called Colonia Traiani, xvii. 1, 11.) and Novesium,[*](Nuys.) Bonna,[*](Bonn.)
After this had been accomplished, one pressing necessity remained, namely, to repair the walls of the recovered cities, since even then no one hindered; and it is evident from clear indications that the savages through fear, and the Romans through love for their commander, at that time served the public welfare.