Expediente, consisting of an informe written by Concha and Troncoso for Ugarte concerning peaceful relations with Indians of Comanches; detailed description of commercial interaction between Comanches and Spaniards; isolated incidents of horse raiding by Young Comanches and Parauanarimuco's actions to correct the crime; joint military expeditions against Apaches; relations between Spaniards and Yupes and Yamparicas; horse raiding between Yutas and Comanches, and Spanish role as mediators in dispute; raids against Pueblo groups by Yutas; leader of Yuta raids named Muchi and efforts of Yutas to bring Muchi to justice; relations between Spaniards and Navajos; conditions of release of Antonio el Pinto from Spanish captivity total breakdown of relations between Navajos and Apaches; reception of a Panana Indian sent to learn of Spanish customs and culture. Second part of informe is a journal of Troncoso's securing Antonio's release; visits to Navajo territory under Concha's orders to observe Navajos and assess their peaceful status; gifts of clothing and tobacco exchanged between Troncoso and Navajos; friendly attitude of Navajos; description of Navajo house structure; description of Navajo foods; discussions between Carlos, Antonio, and Troncoso of treaty between Spaniards and Navajos; commerce between Navajos and Spaniards; relations between Navajos and Apaches; discussion of religious beliefs between Troncoso and Navajos; description of Navajo clothing and ornaments. Ff. 244-249 is a Series of oficios from Concha to Ugarte concerning release of Antonio and conditions thereof, accompanied by orders from Ugarte in response to Concha's letters. (W. Copas, may 1988)