TIBERIUS.--During the long reign of the prudent _Augustus_, there was peace within the borders of the empire. He said of himself, that he "found Rome of brick, and left it of marble." This change may be taken as a symbol of the growth of material prosperity in the Roman dominions. But in his private relations, the emperor was less fortunate. His daughter _Julia_, a woman of brilliant talents, disgraced him by her immorality, and he was obliged to banish her. Her two elder sons died when they were young. The empire devolved on his adopted step-son _Tiberius_ (14-37), who endeavored to continue the same conservative policy. Tiberius was at first alarmed by mutinies among the troops in Pannonia and on the Rhine. The army of the Rhine urged _Germanicus_, the emperor's adopted son and probable successor, to lead it to Rome, promising to place him on the throne, but _Germanicus_ succeeded in quieting the disturbance. As there were during this reign no great wars, _Tiberius_ was able to devote himself more exclusively to the civil administration. He transferred from the popular assembly to the Senate the right of choosing the magistrates, emphasizing in this way the dual system that Augustus had created. The rights of the Senate he appeared scrupulously to respect. For the more effective government of the city of Rome he established there a permanent prefecture and brought together in a camp before the Viminal gate the nine prætorian cohorts. Unhappily this Prætorian Guard, which might serve to overawe the city mobs, might also interfere in the affairs of government. Indeed, a little later it had to be counted with in the choice of emperors. The notorious _Sejanus_ was prefect during a large part of this reign, and acquired so completely the confidence of Tiberius that he began to plot his overthrow. He had already caused _Drusus_, the son of Tiberius, to be poisoned in order to remove one obstacle. Finally the emperor discovered his plots and caused him to be arrested and put to death (31). For several years Tiberius had been living in retirement on the island of _Capreæ_. There his enemies represented him as given over to debauchery, while the lives of Roman citizens were never safe from his suspicions or from the accusations of the _delators_, men who presented formal charges of crime, there being no public prosecutors. Earlier in his reign _Tiberius_ had shown a serious purpose to improve the administration of justice, but with the lapse of years he became distrustful and cruel. He had, moreover, changed the law of treason so that to write or speak slightingly of the emperor was interpreted as conspiracy to bring the commonwealth into contempt and was punished with death. Although he was justly hated by the Roman nobles, in the provinces he was respected because he sought to protect them against extortion and to foster their general interests. He died in the year 37 at the age of seventy-eight.