There appears, indeed, _one_ memorable occasion, in which the senate, after seventy years of patience, made an ineffectual attempt to re-assume its long-forgotten rights. When the throne was vacant by the murder of Caligula, the consuls convoked that assembly in the Capitol, condemned the memory of the Cæsars, gave the watchword _liberty_ to the few cohorts who faintly adhered to their standard, and during eight-and-forty hours acted as the independent chiefs of a free commonwealth. But while they deliberated, the prætorian guards had resolved. The stupid Claudius, brother of Germanicus, was already in their camp, invested with the Imperial purple, and prepared to support his election by arms. The dream of liberty was at an end; and the senate awoke to all the horrors of inevitable servitude. Deserted by the people, and threatened by a military force, that feeble assembly was compelled to ratify the choice of the prætorians, and to embrace the benefit of an amnesty, which Claudius had the prudence to offer, and the generosity to observe. II. The insolence of the armies inspired Augustus with fears of a still more alarming nature. The despair of the citizens could only attempt, what the power of the soldiers was, at any time, able to execute. How precarious was his own authority over men whom he had taught to violate every social duty! He had heard their seditious clamors; he dreaded their calmer moments of reflection. One revolution had been purchased by immense rewards; but a second revolution might double those rewards. The troops professed the fondest attachment to the house of Cæsar; but the attachments of the multitude are capricious and inconstant. Augustus summoned to his aid whatever remained in those fierce minds of Roman prejudices; enforced the rigor of discipline by the sanction of law; and, interposing the majesty of the senate between the emperor and the army, boldly claimed their allegiance, as the first magistrate of the republic.