In that year the chief of the rival tribe of the Ak-koinloos, named Uzun Hassan, who had established himself at Diarbekr, succeeded in defeating Jehan Shah in a battle in which the latter fell. The Ak-koinloos were now masters of Persia, and Uzun Hassan carried his victorious arms against Sultan Abouseyd, the reigning prince of the house of Timour, who also fell before him. Malcolm’s account of the reign of Uzun Hassan is very meagre. He was the chief of the Ak-koinlu, or Turks, of the tribe of White Sheep, and established a powerful principality at Diarbekr. He defeated and killed Jehan Shah and his son Hassan Aly, whom he had taken prisoner, with all his family. The dynasty which Uzun Hassan founded is termed Bâyenderee; the family date their rise from the reign of Timour, who made them grants of land in Armenia and Mesopotamia. Hassan, after defeating his rival, engaged in a war with Sultan Abouseyd. He owed his triumph to his skill and activity in a predatory warfare, and at last having taken his enemy prisoner, made himself master of a great part of the dominions of the house of Timour. Malcolm says: “Uzun Hassan, after making himself master of Persia, turned his arms in the direction of Turkey; but his career was arrested by the superior genius of the Turkish emperor, Mahomet II; he suffered a signal defeat, which terminated his schemes of ambition. He died after a reign of eleven years, at the age of seventy. All authors agree in ascribing valour and wisdom to this prince. We are told by an European ambassador, who resided at his court, that he was a tall thin man, of a very open countenance, and that his army amounted to fifty thousand horse, a great proportion of which were of very indifferent quality.” He adds that this ambassador was an envoy from Venice, sent by that Republic to solicit the aid of Uzun Hassan against the Ottoman. The personage alluded to by Malcolm must have been M. Josafat Barbaro, the successor of M. Caterino Zeno.