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).
Alarmed by this news, the pretorian prefect Taurus speedily retreated, as if avoiding a foreign enemy, and using the rapid changes of the public courier-service, he crossed the Julian Alps, at the same stroke taking away with him Florentius, who was also prefect.