Once again fortune smiled on Don Pedro, after he was compelled to cross the Pyrenees as a fugitive, and leave the whole of his country in the hands of the enemy. The heroic Prince of Wales, called the Black Prince from the color of his armor, being in the south of France, undertook to come to the aid of the deposed monarch both for the sake of a legitimate cause, and in expectation of rich rewards in money and land. Henry de Trastamara was compelled to leave Spain (1367). The whole of the peninsula hailed the victor Don Pedro and his ally, the Black Prince, with enthusiasm, as it had previously rejoiced at the triumph of his brother and the wild Constable of France, Bertrand du Guesclin. Soon, however, the scene changed. The Black Prince left Don Pedro, and Don Henry returned with new levies from France. The northern towns of Spain again fell before his arms. The citizens of Burgos opened their gates to the conqueror, but the Jews remained true to the unfortunate Don Pedro. Assisted by a few loyal noblemen, they bravely defended the Jewry of Burgos, and were subdued only by the superior strength of the enemy. They obtained a favorable capitulation, providing for their undisputed continuance in the town, but they were forced to pay a war indemnity of one million maravedis. This time the Christian population was desirous of profiting by the revolt against Don Pedro. The cortes of Burgos represented to Henry that the Jews, having been favorites and officials under the former king, were largely responsible for the civil war, and that he should sanction a law to exclude them in future from all state employment, including the post of physician to the king or queen, and also from the right of farming taxes. To this Don Henry replied that such a practice had not been countenanced by any former king of Castile. He would, however, not consult with the Jews at his court, nor permit them the exercise of functions which might prove detrimental to the country. From this it is evident that Henry had no particular aversion to the Jews. Possibly, he feared that by oppressing them he might drive them to acts of desperation.