Baldwin de Bourg, who, on the elevation of Baldwin I. to the throne of Jerusalem, had received the principality of Edessa, was now called to the vacant throne, and proved himself one of the wisest and most valiant of the Latin sovereigns of Judea. He also greatly extended the limits of his dominions; but in passing between Turbessel and Edessa, accompanied by a few soldiers only,[485] and unsuspicious of any ambuscade, he was suddenly surrounded, and carried a prisoner to Khortopret, where he remained in close confinement for several years. During his imprisonment Tyre was added to the territories of Jerusalem,[486] and various successful battles were fought against the Moslems. After his liberation he offered the hand of his daughter to Foulk of Anjou, who had some time before visited Jerusalem upon an armed pilgrimage. The Count of Anjou gladly accepted the proposal, and returning to the Holy Land, espoused Melesinda, soon after which he ascended the throne of Jerusalem, on the death of Baldwin. Foulk combined many virtues;[487] was kind, affable, and humane, as well as skilful and courageous in the field. After a reign of thirteen years he left the kingdom to his son, entire, indeed, but neither more extended in territory, nor more consolidated in power, than when he received it. Baldwin III. succeeded; at the time of his accession being but a boy. Dissensions and animosities raged among all the feudal dependants of the crown of Jerusalem.[488] The Moslems scattered through the country, and girding it on every side, took advantage of each new dispute to harass their Latin invaders with desultory warfare. The emperors of the east strove continually to wrest something of their old possessions from the descendants of the crusaders, and thus divided the forces, and paralyzed all the efforts made by the Christians to establish and secure their yet infirm dominion. At length Zenghi, emir of Aleppo, and Mosul marched against Edessa, the government of which principality had been transferred, on the accession of Baldwin de Bourg to the throne of Jerusalem, to Joscelyn de Courtenay, and from him had descended to his son. The son had not inherited the virtues or the valour of his father; and while Zenghi attacked, stormed, and took Edessa, he was rioting in debaucheries at Turbessel. So severe a reverse spread consternation through Palestine. Others, though of a less important nature, followed; and the news of these misfortunes soon reached Europe, where it gave matter to the eloquence of St. Bernard, and occasion for a new crusade.