During the first century the same system was transferred to the imperial administration. It suited the cautious policy of Augustus to disguise his vast powers under the quiet exterior of an ordinary noble; and the freedmen of his household carried on the business of the State. He sternly punished any excesses or treachery among his servants.(635) Tiberius gave them little power, until his character began to deteriorate.(636) Under Caligula, Claudius, and Nero, the imperial freedmen attained their greatest ascendency. Callistus, Narcissus, and Pallas rose to the rank of great ministers, and, in the reign of Claudius, were practically masters of the world. They accumulated enormous wealth by abusing their power, and making a traffic in civic rights, in places or pardons. Polyclitus, who was sent to compose the troubles in Britain in 61 A.D., travelled with an enormous train, and gave the provinces an exhibition of the arrogance of their servile masters.(637) Helius was left to carry on the government during Nero’s theatrical travels, and the exhibitions of his artistic skill in Greece.(638) Galba put to death two of the great freedmen of Nero’s reign, but himself fell under the influence of others as corrupt and arrogant, and he showered the honours of rank on the infamous Icelus.(639) It is curious that it was left for Vitellius to break the reign of the freedmen by assigning offices in the imperial bureaux to the knights, the policy which was said to have been recommended by Maecenas,(640) and which was destined to prevail in the second century. But the change was very incomplete, and the brief tragic reign of Vitellius was disgraced by the ascendency for a time of his minion Asiaticus, whom the Emperor raised to the highest honours, then sold into a troop of wandering gladiators, and finally received back again into freedom and favour.(641) The policy of the Flavian dynasty in the employment of freedmen is rather ambiguous. Vespasian is charged with having elevated Hormus, a disreputable member of the class, and with having appointed to places of trust the most rapacious agents.(642) But this is probably a calumny of the Neronian and Othonian circle who defamed their conqueror. Under Domitian, the freedmen, Entellus and Abascantus, held two of the great secretaryships. But it is distinctly recorded that Domitian distributed offices impartially between the freedmen and the knights.(643) On the accession of Trajan, Pliny, in his Panegyric, exults in the fall of the freedmen from the highest place.(644) Yet Hadrian is said to have procured his selection as emperor by carefully cultivating the favour of Trajan’s freedmen. Hadrian, in reorganising the imperial administration, and founding the bureaucratic system, which was finally elaborated by Diocletian and Constantine, practically confined the tenure of the three great secretaryships to men of equestrian rank. Among his secretaries was the historian Suetonius.(645) Antoninus Pius severely