While the Castilians were prosecuting their important campaign in the West, the genius of the King of Aragon was again asserting itself in the principality of Valencia. Under the lax system of political morality prevalent during the Middle Ages, an insignificant event was not infrequently made the pretext for a protracted and bloody war. Abu-Djomail, Emir of Valencia, for some reason deferred the delivery of tribute to Jaime, his suzerain, and the latter, elated by the conquest of Majorca, determined to make this an excuse to add to his already extensive dominions the most valuable remaining province of Spain. Profoundly politic as well as brave, the King of Aragon obtained the official sanction of Pope Gregory IX. for his meditated design, and the inauguration of a fresh crusade was proclaimed to the bold adventurers of Europe. An extraordinary tax was voted for the pious enterprise by the Cortes of Catalonia; a great army was assembled, and the campaign was begun by the siege of Burriana, a strongly fortified seaport, whose numerous garrison and maritime relations with the neighboring states of Africa promised a long and vigorous resistance. This expectation was verified to the letter. Several months elapsed before the place surrendered. It was midwinter, for the impetuosity of Jaime did not consider, in the attack on an enemy, either the disadvantages of the season or inferiority in numbers. In the conduct of this siege he displayed the qualities of an able commander even more conspicuously than he had done before Majorca. He personally directed the operations of the military engines. He led the troops to the breach. He exercised careful supervision over the camp, provided for the comfort of the soldiers, dressed the wounds of the injured, cheered with words of consolation the last moments of the dying. The severe privations it was called upon to endure damped the enthusiasm of the army. Some of the discontented nobility demanded that the siege be raised. The King refused, even in the face of the imminent desertion of a majority of his troops. While the malcontents remained sullenly in camp, he, supported only by a few faithful followers, skirmished daily with the enemy, who, having learned the condition of affairs, had assumed the offensive. At length the determination of the King prevailed, and the nobles returned to their duty. The siege was thenceforth pressed with redoubled energy, and Burriana was soon added to the long list of Jaime’s conquests. Its reduction caused the immediate surrender of the strong city of Peniscola and of a considerable number of towns in the Valencian territory. The disaffection of the Aragonese and Catalonian nobility was removed by these successes, and their fidelity was confirmed by the immediate investiture of the most distinguished of their number with the larger part of the conquered domain,--a politic measure which increased their military and feudal obligations, while it