His prospects of ulterior measures were, however, sufficiently remote to induce him to attempt an arrangement through the intervention of his son Demetrius. The latter had been educated in Rome, and of course had a thorough understanding of the Roman character. He succeeded in his mission, but he obtained his end in a less agreeable sense; for his existence was brought to a close by treachery. Some designing persons fomented a feeling of jealousy between himself and his elder brother, Perseus, who poisoned the mind of Philip with such fatal effect, that he caused the poisoning--not merely mental, but physical--of his son Demetrius. When the wretched parent discovered that he had been duped, he became so uneasy in his mind, that he went quite out of it, and died at the age of three-score, unable to meet the heavy score that he had run up against himself in the court of his own conscience. Perseus was hailed by the Romans as king; but all their hailing could not render his reign prosperous. He endeavoured to cement his power by a marriage with the daughter of Antiochus Epiphanes, for Perseus thought that the aid he would derive from the match, would render him more than a match for his enemies. He gave his sister to Prusias of Bithynia, in the hope that the latter, having married into the family, would feel himself wedded to its interests. Avarice was, however, the ruin of Perseus; for he did not understand the true use of the purse, which he used his utmost exertions to fill, and then held its strings with parsimonious stringency. He had promised to pay his allies, but their zeal in his cause subsided when they were left without their subsidies. Eumenes of Pergamus being among others seized with a panic, went to Rome to ask advice, and on his return nearly lost his life on the highway, by some persons who attacked him in a very low manner. He was passing a narrow footpath near Delphi--from which it would appear that he had walked at least a portion of the way--when some persons concealed in the rocks, hurled down several large blocks of granite, which though not causing his death, brought him within a stone's throw of it. Several huge pieces having fallen upon him, something struck him that all was not right; and he was revolving the affair in his mind, when he found himself rolling down the precipice. He was picked up nearly lifeless, but though very much jammed, he was preserved; and though almost dashed to pieces, he was sufficiently collected, in a few days, to be enabled to go home, by another road, to Asia. It was said that Perseus had had a hand in this disgraceful affair; but he declared that even if he had wished for the death of Eumenes, he would not have been guilty of making such a desperate push for it.