extraordinary commission granted by a vote of the Senate came the fact that the Empire remained for ages without any law of succession. A law prescribing a mode of election and a law prescribing a rule of hereditary succession both assume an ordinary office which must be filled by some one; the Empire was in its origin an extraordinary office which might not be filled at all. A vote, or several votes, of the Senate entrusted a single citizen--or more than one citizen--with powers which practically amounted to sovereignty, and which in the end grew into acknowledged sovereignty. But that growth was slow. For a long time after the Empire began, the republican constitution, the republican magistracies, the republican assemblies, still lived on untouched in their outward framework. They had simply lost all living energy through the growth of a power greater than all, a power which sometimes directed their course of action, sometimes itself acted in their stead. If we could conceive, as once or twice did happen for a short time, the controlling power removed, that is, if the extraordinary commissions which made up the Imperial power were not granted to any one, the old elements of the commonwealth were there, able again to act for themselves as of old. The Senate, after ages of utter nullity, actually did act again as an independent body when the Goth was at the gates of Rome and the Emperor was far away at Ravenna. For Rome once more to act without her master there was no need to create any new power, but simply to take the fetters off an old one. In the earlier ages of the Empire, when the old traditions were more lively, when the forms of the old constitution were still observed, such a change would doubtless have been far more easy. A modern kingdom cannot be changed into a republic without an active change in its constitution. The executive authority must be vested in some new power to be created and defined for the purpose. The Roman Empire might have been turned back into a republic by a purely negative change. All that was needed was not to appoint an Emperor. The various powers of the State which had left off acting or had come to act only as the Emperor bade them, would doubtless, from lack of practice, from change in all surrounding circumstances, have found it practically impossible to act as they had done in the days of the old commonwealth. But there would have been no formal hindrance to their so doing; there would have been no need to clothe Senate or magistrates with any powers beyond those which they still held, though in a dormant state.