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).
And not content with that alone, he gathered for
However, it was current rumour everywhere, that Julian was not chosen to relieve the distress of Gaul, but that he might meet his death in the cruellest of wars, being even then (as it was thought) inexperienced and one who could not stand even the clash of arms.
While the fortifications of the camp were rapidly rising and part of the soldiers were garrisoning the country posts, part gathering in grain warily for fear of ambush, a horde of savages, outstripping by their extraordinary speed any rumour of their coming, with a sudden attack set upon Barbatio and the army he commanded, which was (as has been said) separated from the Gallic camp; and they followed them in their flight as far as Augst, and as much farther as they could; then, after seizing the greater part of his baggage and pack-animals, together with the camp-followers, they returned home again.
And Barbatio, as if he had ended the campaign successfully, distributed his soldiers in winter quarters and returned to the emperor’s court, to frame some charge against Caesar, as was his custom.