The present-day boundaries of Guatemala and nearby areas, including the Yucatan, encompass the Maya, whose presence can be traced to 2,500 B.C. (Coe: 1966). The Maya have experienced a great part of general evolution, passing from the hunter and gatherer to agricultural/technological levels; they have organized as bands, tribes, and chiefdoms and now live within a modern nation state. Throughout this progression they have had to contend with forces in the natural environment and still continue to adapt to it with many of the techniques assumed to have been part of their cultural repertoire during the phase of sedentary village life in the area. The lack of settlement pattern studies in the Peten region has produced a situation in which the localized definition of tribal society is not yet complete (Sanders and Price: 1968), and until archaeology unearths the remnants and reflections of their struggle, we will be unable to do more than make broad assumptions about Mayan society and culture in the middle Formative period.

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).