These were the halcyon days of Hebrew prosperity in Spain. Their distinguished abilities were recognized, and they won to many positions of importance in the government. The finances of the kingdom were in their control, and Castile prospered under their able administration of its commerce. Alfonso VIII, in whose reign it is estimated there were 12,000 Jews in Toledo alone, employed a Jew as his treasurer, and did not disdain to take a Jewess for his mistress--an interesting little fact in view of the law that was so soon to be promulgated on that subject. Hardly less than their value to the nation’s commerce were their services to science, art, and literature. They excelled particularly in medicine and chemistry, and the most skilful doctors and surgeons of the Middle Ages were men of their race. * * * * * In the middle of the thirteenth century a change unfortunately set in, and this external harmony so laboriously established was disturbed by an excrescence of the real feelings that had never ceased to underlie it. Largely the Jews were themselves to blame. Deluded by the religious liberty that was conceded them, by the dignities to which men of their faith had climbed, and by the prosperity which they had attained, they failed to perceive that their accumulated wealth was in itself a menace to their safety. Emboldened by the consideration shown them, they committed the imprudence of giving a free rein to their Oriental taste for splendour; they surrounded themselves with luxury, and permitted themselves an ostentatious magnificence in their raiment and equipages, and thus proclaimed the wealth they had been amassing through generations of comparative obscurity. Had they confined themselves to this strictly personal display all might yet have been well. But being dressed and housed in princely fashion, they put on princely ways. They grew haughty and arrogant with the horrible arrogance of wealth. They allowed their disdain of the less affluent Christians to transpire in their contemptuous bearing towards them, and being unchecked in this it was but another step to abuse the privileges which they enjoyed. Their parade of wealth had provoked envy--the most dangerous and maleficent of the passions implanted in the human heart. Their arrogance and cavalier bearing stirred that envy into activity. Questions arose touching the sources of their wealth. It was propounded against them that their usurious practices had ruined many of the Christians whom they now dared to spurn. And although usury had been sanctioned and it had been proclaimed lawful for them to charge a rate of interest as high as 40 per centum, it was suddenly remembered that usury had in all times been uncompromisingly condemned by the Church--and by the term usury the Church then understood any interest, however slight, paid upon borrowed money.