Official copy of the diary of Mendoza's 1683-1684 expedition to the Jumano Indians on the upper Colorado River in Texas. Mendoza reports his favorable impressions of the region and of its inhabitants, large numbers of whom were baptized by the explorers near present-day San Angela. This copy is bound with a letter by Domingo Gironza Petriz de Cruzate, governor of New Mexico, to the Viceroy of New Spain. Dated October 7, 1684, the letter explains Cruzate's commissioning of the diary copy, endorses Mendoza's views, and requests permission and equipment for an expedition of conquest to the area. He also reports on the killing of Fray Manuel Beltran and others by Indians at Casa Grandes Mission and the Mission of Saint Gertrude and on Spanish reprisals for these attacks.