Every precaution which could have a tendency to maintain the social and domestic ostracism that popular intolerance had placed upon the Jew was enforced by civil and ecclesiastical authority. He could not legally marry a Christian, inherit real property, hold slaves. In royal donations, where, without warrant of right or pretence of ancient custom, he was deprived of his liberty and his possessions, his person was thereafter attached to the glebe. He was forbidden the exercise of many of the most profitable mechanical arts in which he excelled. Christians could not eat or drink with him, visit his house, listen to his conversation, or learn his language. The priesthood considered the integrity of the doctrines which were at once the foundation and the instruments of their power as of far greater importance than the material comfort and intellectual improvement of their parishioners. They were quick to recognize the peril with which ecclesiastical institutions would be threatened if exposed to the logic and sarcasm of Hebrew criticism. The necessities of society could not, as yet, permit the extermination of the Jews, but their practical isolation was imperatively demanded by considerations of prudence, and by the just apprehension that the toleration of social intimacy would eventually result in the emancipation of the masses from ignorance, and the consequent disintegration of the Church. The Dominican and Franciscan Orders were the sworn enemies of the Jew from the very day of their organization. The Inquisition was introduced into Spain for the express purpose of plundering the rich Jews of Aragon. The efforts of the Papacy were assisted by the policy of the more bigoted of the rabbis, who saw, with no less apprehension than their Christian oppressors, the diffusion of liberal ideas which threatened their own authority and importance. Under such discouraging conditions had the Jews maintained their national existence, the purity of their religion, the perpetuation of their customs, the permanence of their laws amidst the anarchy, corruption, and intolerance of mediæval Europe. The origin of this strange people is absolutely unknown. Their roving propensity probably dates from the very foundation of the race, as the words Hebrew and pilgrim are derived from the same root. No question, however, can exist concerning their Semitic affiliations. Their geographical distribution was extensive in very early times. The most ancient collection of myths extant describes their migrations. They were numerous in China during the third century before Christ. Profoundly superstitious, implicit believers in omens, idolaters while professing monotheism, the facile dupes of wizards and magicians, the simplest phenomena of nature were always, in their eyes, invested with a mysterious or an astrological significance. Even their division into tribes has been traced by Dozy to a cabalistic association with the twelve signs of the zodiac.