Busi the Prince of Damascus was marked for destruction. Tahir the friend of the Assassins had been executed and six thousand of the Order had been massacred in 1129 at that prince’s command; therefore there was no escape for Busi. Within two years of that massacre he was attacked by a band of Assassins and escaped with difficulty; the year following, however, brought death to him from the effects of wounds received in that encounter. The vengeance of the Assassins continued for years; it waited for time, opportunity, and place, nay more, it passed from one generation to another. They never forgot and never forgave. Shems ul Muluk, son of Busi, as well as many other people of renown fell under the daggers of the Order. The mufti of Kasvin and the mayors of Ispahan and Tebriz were among those who perished. Besides rulers and great men a multitude of merchants and ordinary men were murdered by the tools of Hassan Ben Sabah and his successors the so-called apostles of Islam. But in spite of the bitter enmity between the Abbasids and the Fatimids and the fact that the Assassins, an offshoot of the Fatimids, had worked long and industriously to overthrow their opponents, the throne of the Kalif of Bagdad had not been stained with the blood of its occupants thus far. But the time had now come when the Order dared to murder even the successor of the Prophet. Through a strange retribution, however, Kalif Abu Ali Mansur the tenth of the Fatimid dynasty was the first to die by the hand of an Assassin, but whether this death was effected by the policy of the Order or by private revenge is unknown. It was thought by many that the murderer was employed by the family of Efdhal, the grand vizir. Efdhal had been as dangerous for the Kalif at Cairo through the immense power which he wielded in Egypt as for the Crusaders because of his hatred for them and the great energy with which he warred against them. He was cut down by two men who belonged to the Order. No one knew who had employed those two persons, whether the murderers were the tools of the Crusaders, or of the Kalif. At first suspicion fell on the Kalif. The son of Efdhal, Abu Ali, who was imprisoned immediately upon the death of his father, was set free after the assassination of the Kalif and given the office and titles of the vizir. But Assassins soon attacked and killed Abu Ali. It may be that all three murders were caused by the machinations of unknown enemies. Egypt from this time on presents scenes of turmoil and disorder produced by great struggles between partisans of the Kalifs of Bagdad and Cairo, or in other words between the Abbasids and the Fatimids.