1. M. de Montesquieu (Considerations sur la Grandeur et la
Decadence des Romains, c. 17) Supposes, on the authority of
Orosius and Eusebius, that, on this occasion, the empire,
for the first time, was really divided into two parts. It is
difficult, however, to discover in what respect the plan of
Galerius differed from that of Diocletian.