The Magian, as being one of the most skillful makers of astronomical instruments, and attached to the sanctuary, had a key of the room he had designated. Zminis found him there, and their business was quickly settled. They knew each other well, and each knew things of the other which inspired them with mutual fear. However, as time pressed, they set aside all useless antagonisms, to unite against the common foe. The Magian knew already that Zminis had been named to Caesar as a possible successor to the chief of the night-watch, and that he had a powerful rival. By the help of the Syrian, whose ventriloquism was so perfect that he never failed to produce the illusion that his feigned voice proceeded from any desired person or thing, Serapion had enmeshed the praetorian prefect, the greatest magnate in the empire next to Caesar himself, and in the course of the past night had gained a firm hold over him. Macrinus, a man of humble birth, who owed his promotion to Severus, the father of Caracalla, had, the day before, been praying in the Pantheon to the statue of his deceased patron. A voice had proceeded from the image, telling him that the divine Severus needed him for a great work. A pious seer was charged to tell him more exactly what this was; and he would meet him if he went at about sunset to the shrine of Isis, and called three times on the name of Severus before the altar of the goddess. The Syrian ventriloquist had, by Serapion's orders, hidden behind a pillar and spoken to the prefect from the statue; and Macrinus had, of course, obeyed his instructions. He had met the Magian in the Temple of Isis, and what he had seen, heard, and felt during the night had so deeply affected him that he had promised to revisit Serapion the next evening. What means he had used to enslave so powerful a man the Magian did not tell his ally; but he declared that Macrinus was as wax in his hands, and he came to an agreement with the Egyptian that if he, Serapion, should bring about the promotion for which Zminis sighed, Zminis, on his part, should give him a free hand, and commend his arts to Caesar. It needed but a few minutes to conclude this compact; but then the Magian proceeded to insist that Alexander's father and brother should be made away with. "Impossible," replied Zminis. "I should be only too glad to wring the necks of the whole brood; but, as it is, I am represented to Caesar as too stern and ruthless. And a pretty little slut, old Heron's daughter, has entangled him in her toils." "No," said Serapion, positively. "I have seen the girl, and she is as innocent as a child. But I know the force of contrast: when depravity meets purity--" "Come, no philosophizing!" interrupted the other. "We have better things to attend to, and one or the other may turn to your advantage." And he told him that Caesar, whose whim it was to spare Alexander's life, regarded Melissa as an incarnation of Roxana.