Zosim. 1. i. p. 3 [1. ii. c. 34]. That partial historian seems to celebrate the vigilance of Diocletian, with a design of exposing the negligence of Constantine; we may, however, listen to an orator: "Nam quid ego alarum et cohortium castra percenseam, toto Rheni et Istri et Euphratis limite restituta." Panegyr. Vet. iv. 18.