Drusus had conducted a foray into the Black Forest region, which had not been altogether successful. On his return he either fell from his horse or caught some serious fever--both stories are given--and was seen to be in such danger that Augustus, who was then at Lyons, at once sent for Tiberius from Dalmatia. Tiberius hastened to his brother’s bedside. The elder Pliny tells us that on this occasion he achieved a record speed, travelling 200 Roman miles within twenty-four hours. He was in time to close his brother’s eyes, but that was all. Augustus decided that Drusus should be buried at Rome, and Tiberius marched the whole way on foot at the head of the funeral procession from Lyons to the capital. As soon as the ceremonies were over, he returned to continue his brother’s work on the eastern bank of the Rhine, and after two years’ absence was recalled. Mæcenas had died in B.C. 8, and Augustus felt the need of a confidential adviser. Tiberius on his return was invested with the tribunician power, an elevation which, in the opinion of his contemporaries, finally marked him out as the successor of Augustus. The history of the tribunate, in spite of the many references to the office, is not particularly clear. It seems that the first tribunes were originally the official mouthpieces of that part of the population of Rome whom we should now call “Outlanders.” After the “Outlanders,” or plebeians, had become for all practical purposes fused into the general body of Roman citizens, the tribunes ranked practically among the other magistrates; they enjoyed the special prerogative of being sacrosanct, their persons were inviolable, and thus during their term of office they were nominally above the laws, a privilege which, however, did not prevent their assassination. They had the power of introducing legislation, and of vetoing legislation, and it is perhaps this power which was constitutionally most important to the early Emperors. Further, they had powers of summary jurisdiction, and constituted a supreme court of appeal in cases in which the life of a Roman citizen was in danger; when St. Paul “appealed unto Cæsar,” it was to the tribune that he appealed. The office was hallowed by sentiment, and though as Consul and Censor and Commander-in-chief the Emperor might seem to hold in his hands all the reasonable means of making his power effective, unless he were also Tribune, his actions could be vetoed; thus Augustus was more than usually wise in absorbing the sanctity and the functions of the Tribune into his own person, and he could show no greater proof of his confidence in Tiberius than by thus giving him the power of constitutional opposition and investing his person with inviolability; but, to the astonishment of the Roman world, Tiberius had hardly received this mark of confidence before he summarily left Rome and retired to Rhodes. VII The First Retirement of Tiberius