Murad summoned Hafiz to return to die. The Vizier came back, made the ablution of the Moslem law before death, went forth calmly to the mob, and was hewn in pieces outside the gate of the Seraglio. "Infamous assassins," cried Murad, "who fear neither Allah nor his prophet, some day if God wills you shall find your victims terribly avenged." "The sole remedy against abuses is the sword," one said to the Sultan; and the rest of his life showed how well he understood the lesson. One by one the leaders of the revolt were secretly assassinated; their bodies were found floating on the Bosporus. The Janissaries and the sipahis were ostensibly received into favour again, justice was promised, and the strict rule of law. But it was a reign of terror that Murad inaugurated. His first execution had given him a passion for blood. Sometimes he gratified it in the chase, when he slaughtered thousands of head, driven together by an army of beaters. More often it was displayed in the slaughter of men. In the year 1637 it was declared that he had executed 25,000 men, many of them with his own hand. "He was now terrific to behold. His savage black eyes glared threateningly in a countenance half hidden by his dark brown hair and long beard; but never was its aspect more peculiar than when it showed the wrinkles between the eyebrows. His skill with the javelin and the bow was then sure to deal death to some one. He was served with trembling awe. His mutes were no longer to be distinguished from the other slaves of the Serai, for all conversed by signs. While the plague was daily carrying off fifteen hundred victims in Constantinople, he had the largest cups brought from Pera, and drank half the night through, while the artillery was discharged by his orders."[39] Drunken and brutal as he was he had still much of the terrible force of the early Ottomans. He led his own troops to battle, and when they flinched--for the old spirit seemed to have deserted even the Janissaries--he drove them forward with his own sword. He appears in history as the Conqueror of Bagdad (1638) a conquest marked, it is said, by a massacre of 25,000 people. He was the last Sultan whom the people of Constantinople saw return in triumph from a war of which he himself had been the leader.