The fate of the Magister Equitum Marcellus

In A.D. 357 while at Antioch the sophist Libanius wrote a letter to his friend Anatolius in which he congratulated him on his appointment as praefectus praetorio Illyrid. He expressed his pleasure at the conduct of Anatolius in his new appointment, and related a story which he had heard at Antioch from Musonianus, the praefectus praetorio Orientis. On his appointment, Anatolius had promised Constantius II that he would not ignore the misconduct of any official, whether civilian or military, whatever his rank. This promise had been put into effect almost immediately when one of the military commanders who showed cowardice against the barbarians was arrested