As stated above, the expedition of Coronado was not designed as a mere exploration, but rather for the purpose of establishing a permanent settlement. Coronado's second letter, the first in which he touches upon the Rio Grande Pueblos, appears to have been lost. His letter of October 20, 1541, although written near the site of the present Bernalillo, New Mexico, contains very little in regard to the Rio Grande Pueblos. The briefer documents pertaining to Coronado's expedition, and written while the Spaniards were still in New Mexico, with the exception of one (the report of the reconnoissance made by Hernando de Alvarado, accompanied by Fray Juan de Padilla to the east) concern Zuni almost exclusively. The document respecting Alvarado's journey is contained in the _Coleccion de Documentos_ from the archives of the Indies, but is erroneously attributed to Hernando de Soto. The celebrated historiographer of Spain, Juan Bautista Munoz, unacquainted with New Mexico, its geography and ethnography, criticized it rather harshly; nevertheless, the document is very reliable in its description of country and people: it alludes to features which are nowhere else noticed, and which were rediscovered by the late Frank Hamilton Cushing and myself about twenty-eight years ago. The number of villages and people in the Rio Grande region, of which the document gives a brief description, are, as usual, exaggerated; and it could hardly have been otherwise in view of a first and hasty visit, but it remains the earliest document in which Acoma and a part of the Rio Grande valley are treated from actual observation. The reconnoissance was made from August to October, 1540. It may be that one of the villages briefly described is Pecos, which lies of course some distance east of the Rio Grande, and the document is possibly the first one in which the nomadic Indians of eastern New Mexico are mentioned from actual observation.