The recent discovery in Lima's National Museum of History of a sixteenth-century inspection of the royal repartimiento of Yanque Collaguas in the district of Arequipa, has stimulated a search for further important documentation about the region. The investigation was made possible by financial support from the Ford Foundation under its Peruvian program for projects in the social sciences (PA73–807). The project is coordinated by Dr. Franklin Pease G. Y., with the active participation of Dr. N. David Cook, Professor Juan Carlos Crespo (Catholic University, Lima), and Dr. Alejandro Malaga Medina (University of San Agustin, Arequipa).