Haji was succeeded by his brother Hasan, who was still a minor; the emirs who ruled in his name competed for the highest posts until Baibagharus and his brother Menjik carried off the victory. These two ruled supreme for a time. The so-called "black death" was ravaging Egypt; many families were decimated, and their riches fell to the state. The disease, which differed from the ordinary pest in the blood-spitting and internal heat, raged in Europe and Asia, and spread the greatest consternation even amongst the Moslems, who generally regarded disease with a certain amount of indifference, as being a divine decree. According to Arabic sources, the black death had broken out in China and from there had spread over the Tatar-land of Kipjak; from here it took its course towards Constantinople, Asia Minor, and Syria on the one hand, and towards Greece, Italy, Spain, France, and Germany on the other, and was probably brought to Egypt from Syria. Not only men, but beasts and even plants were attacked. The ravages were nowhere so fearful as in Egypt; in the capital alone in a few days as many as fifteen or twenty thousand people were stricken. As the disease continued to rage for two years, there was soon a lack of men to plough the fields and carry on the necessary trades; and to increase the general distress, incursions were made by the tribes of Turcomans and Bedouins, who plundered the towns and villages. Scarcely had this desperate state of affairs begun to improve when court intrigues sprang up afresh, and only ended with the deposition of the sultan in August, 1351. He was recalled after three years, during which his brother had reigned, and he was subsequently deposed and put to death in March, 1361. Finally the descendants of Nasir, instead of his sons, began to rule. First came Muhammed Ibn Haji, who, as soon as he began to show signs of independence, was declared to be of unsound mind by his chief emir, Ilbogha; then Shaban, the son of Husain (May, 1363), who was strangled in March, 1377; and finally Husain's eight-year-old son Ali. After repeated contests, Berkuk and Berekeh, two Circassian slaves, placed themselves at the head of the government. Berkuk, however, wished to be absolute, and soon put his co-regent out of the way (1389). He contented himself at first with being simply regent, and, even when Ali died, he declared his six-year-old brother Haji, sultan. The following year, when he discovered a conspiracy of the Mamluks against him, and when many of the older emirs were dead, he declared that it was for the good of the state that no longer a child, but a man capable of directing internal affairs and leading an army against the enemy, should take over the government. The assembly, whom he had bribed beforehand, supported him, and he was appointed sultan in November, 1382.