Once again was Syria threatened by Kara Yusuf, but he was soon forced to return to Irak by the conspiracy of his own son, Shah Muhammed, who lived in Baghdad. As soon as this insurrection was put down, Kara Yusuf was obliged to give his whole attention to Shah Roch, the son of Tamerlane, who had raised himself to the highest power in Persia, and was now attempting to re-conquer the province of Aderbaijan. Kara Yusuf placed himself at the head of an army to protect this province, but suddenly died (November, 1420) on the way to Sultania, and his possessions were divided among his four sons, Shah Muhammed, Iskander, Ispahan, and Jihan Shah, who all, just as the descendants of Tamerlane had done, immediately began to quarrel among themselves. The sultan was already very ill when the news of Kara Yusufs death reached him. The death of Ibrahim, his son, whom he had caused to be poisoned, on his return from Asia Minor, weighed heavily upon him and hastened his death, which took place on January 13, 1421. He left immense riches behind him, but could not obtain a proper burial; everything was at once seized by the emirs, who did not trouble themselves in the least about his corpse. He had been by no means a good sultan; he had brought much misery upon the people, and had oppressed the emirs. But in spite of all he had many admirers who overlooked his misdeeds and cruelty, because he was a pious Moslem; that is, he did not openly transgress against the decrees of Islam, favoured the theologians, and distinguished himself as an orator and poet; he also founded a splendid mosque, a hospital, and a school for theology. His whole life abounds in contrasts. After he had broken his oath to Newruz, he spent several days in a cloister to make atonement for this crime, and was present at all the religious ceremonies and dances. Although he shed streams of blood to satisfy his avarice, he wore a woollen garment, and bade the preachers, when they mentioned his name after that of Muhammed, to descend a step on the staircase of the chancel. Under a religious sultan of this stamp, the position of the non-Muhammedans was by no means an enviable one. The Jews and Christians had to pay enormous taxes and the old decrees against them were renewed. Not only were they forced to wear special colours, but the length of their sleeves and head-bands was also decreed, and even the women were obliged to wear a distinctive costume. [Illustration: 067.jpg A TITLE-PAGE OF THE KORAN OF THE TIME OF SHABAN]