It was impossible that such a character, and such conduct as that of Caracalla, could inspire either love or esteem; but as long as his vices were beneficial to the armies, he was secure from the danger of rebellion. A secret conspiracy, provoked by his own jealousy, was fatal to the tyrant. The Prætorian præfecture was divided between two ministers. The military department was intrusted to Adventus, an experienced rather than able soldier; and the civil affairs were transacted by Opilius Macrinus, who, by his dexterity in business, had raised himself, with a fair character, to that high office. But his favor varied with the caprice of the emperor, and his life might depend on the slightest suspicion, or the most casual circumstance. Malice or fanaticism had suggested to an African, deeply skilled in the knowledge of futurity, a very dangerous prediction, that Macrinus and his son were destined to reign over the empire. The report was soon diffused through the province; and when the man was sent in chains to Rome, he still asserted, in the presence of the præfect of the city, the faith of his prophecy. That magistrate, who had received the most pressing instructions to inform himself of the _successors_ of Caracalla, immediately communicated the examination of the African to the Imperial court, which at that time resided in Syria. But, notwithstanding the diligence of the public messengers, a friend of Macrinus found means to apprise him of the approaching danger. The emperor received the letters from Rome; and as he was then engaged in the conduct of a chariot race, he delivered them unopened to the Prætorian Præfect, directing him to despatch the ordinary affairs, and to report the more important business that might be contained in them. Macrinus read his fate, and resolved to prevent it. He inflamed the discontents of some inferior officers, and employed the hand of Martialis, a desperate soldier, who had been refused the rank of centurion. The devotion of Caracalla prompted him to make a pilgrimage from Edessa to the celebrated temple of the Moon at Carrhæ. 381 He was attended by a body of cavalry: but having stopped on the road for some necessary occasion, his guards preserved a respectful distance, and Martialis, approaching his person under a presence of duty, stabbed him with a dagger. The bold assassin was instantly killed by a Scythian archer of the Imperial guard. Such was the end of a monster whose life disgraced human nature, and whose reign accused the patience of the Romans. 39 The grateful soldiers forgot his vices, remembered only his partial liberality, and obliged the senate to prostitute their own dignity and that of religion, by granting him a place