Altogether there are found in the roll of tributary pueblos 358 names when Montezuma II was dominant chief (1502-1520). These were small industrial settlements in all of which a particular kind of tribute was prepared; some sent cotton cloths, others raw cotton, others timber for fuel or building; from others came weapons, deerskins, tobacco. The tributes were generally paid annually in prescribed quantities. Under this system the great bulk of the population, the Nahuatlacan peasantry, were condemned to a life of severest toil of all kinds done in behalf of the warrior and priestly classes. The warriors, too, every twenty days, had to take the field, partly as a military exercise, partly also to provide the human sacrifices that, according to their old elaborate Mexican ritual, had to be offered to the gods. The priests took charge of the prisoners, prepared them for the sacrifices, divided the flesh of the victims, and arranged their skulls in the precincts of the temple, this being the method of keeping a regular toll of the offerings. There were more commonplace tasks of the priestly order, the Teopixqui, that must have filled up the intervals between the frequent great sacrificial festivals. In each teopan, or temple dedicated to a divinity, the sacred fire was kept ever burning; besides, there was the regular offering of incense, four times a day, at sunrise, noon, sunset, and midnight. To keep up this sequence of devotion and also the prescribed immolations, at stated intervals the heavens were scrutinized with official vigilance day and night. At midnight all those attached to the teopan were aroused for the solemn offering of blood that took place in a penitential chamber, each worshiper supplying his share of blood by tearing his own body with a strap of aloe thorns.