In addition to the causes of decline named, others of importance were her treatment of the Jews and the Moriscos, though the banishment of the former took place at an earlier date. Despite their activity in trade and finance and the value to the nations of their genius for business, the Jews of Europe were everywhere persecuted, often exposed to robbery and massacre, and expelled from some kingdoms. In Spain their expulsion was conducted with cruel severity. Many of the unfortunate Jews, seeking to escape persecution, embraced Christianity. But their conversion was doubted, they were subjected to constant espionage, and the least suspicion of indulging in their old worship exposed them to the dangerous charge of heresy, a word of frightful omen in Spain. It was to punish these delinquent Jews that in 1480 the Inquisition was introduced, and at once began its frightful work, no less than two thousand "heretics" being burned alive in 1481, while seventeen thousand were "reconciled," a word of mild meaning elsewhere, but which in Spain signified torture, confiscation of property, loss of citizenship, and frequently imprisonment for life in the dungeons of the Inquisition. Severe as was the treatment of the Jews throughout Christendom, nowhere were they treated more pitilessly than in Spain. The year 1492, in which Spain gained glory by the conquest of Granada and the discovery of America, was one of the deepest misfortune to this people, who were cruelly driven from the kingdom. The edict for this was signed by Ferdinand and Isabella at Granada, March 30, 1492, and decreed that all unbaptized Jews, without regard to sex, age, or condition, should leave Spain before the end of the next July, and never return thither under penalty of death and confiscation of property. Every Spaniard was forbidden to give aid in any form to a Jew after the date named. The Jews might sell their property and carry the proceeds with them in bills of exchange or merchandise, but not in gold or silver. This edict came like a thunderbolt to the Israelites. At a tyrant’s word they must go forth as exiles from the land in which they and their forefathers had dwelt for ages, break all their old ties of habit and association, and be cast out helpless and defenceless, marked with a brand of infamy, among nations who held them in hatred and contempt.