Arriving in Mexico less than a decade after the Spanish conquest of 1521, the Franciscan missionary Bernardino de Sahag n not only labored to supplant native religion with Christianity, he also gathered voluminous information on virtually every aspect of Aztec (Nahua) life in contact-period Mexico. His pioneering ethnographic work relied on interviews with Nahua elders and the assistance of a younger generation of bicultural, missionary-trained Nahuas...