One of the most important duties of the priesthood was that of education, to which certain buildings were appropriated, within the enclosure of the principal temple of each city. Here the youth of both sexes, of the middle and higher classes, were placed when very young; the girls being entrusted to the care of priestesses, for women exercised all sacerdotal functions except those of sacrifice. In these institutions the boys were drilled in monastic discipline. They decorated the shrines of the gods with flowers, fed the sacred fires, and took part in the religious chants and festivals. Those in the higher schools were initiated in the traditionary law, the mysteries of hieroglyphics, the principles of government, and in astronomical and natural science. The girls were instructed in all feminine employments, especially in weaving and embroidery. The discipline, both in male and female schools, was stern and rigid. The temples were supported by the revenue from lands bestowed upon them by successive princes. These were managed by the priests, who were considered as excellent masters, treating their tenants with liberality and indulgence. Besides this they were entitled to the first fruits of all produce, and were constantly receiving rich offerings from the pious. The surplus, beyond what was required for the support of the priests, was distributed in alms among the poor, charity being strongly prescribed by the moral code of the nation. Thus the Aztec religion was a strange mixture of good and evil. The moral discipline enforced by it was excellent. Many of its precepts resembled very closely those of Christianity, and yet the whole was contaminated by the wholesale sacrifices. It is supposed that this dual religion was the result of the mixture of two peoples, the mild and gentle tenets of the Toltecs being adopted by the fierce Aztec invaders, who added to them their own superstitious and bloody rites. All this, however, was unknown to Roger at the time. He saw the dark side of their religion, only, and was ignorant that there underlay it a system which, in point of morality, love of order and method, and a broad charity, was in no way inferior to that practiced among Christian nations.