The value of Espejo's narration is undoubtedly great. The author was a close practical observer and a sincere reporter. The more is it surprising that his statements in regard to the population of the Pueblos are so manifestly exaggerated; yet, as I have elsewhere stated, this may be explained. A tendency to enhance somewhat the importance of discoveries is inherent in almost every discoverer, but in the case of Espejo he was exposed to another danger. As he proceeded from village to village the natives gathered at every point from other places out of curiosity, fear, or perhaps with hostile intent, so that the number of the people which the explorer met was each time much larger than the actual number of inhabitants. On the question of population Espejo could have no knowledge, since he had no means of communicating with the people by speech. Furthermore, it is well known that a crowd always appears more numerous than it would prove to be after an actual count; besides, even if he could have counted the Indians present, he would have fallen into the error of recording the same individual several times. During the comparatively short time which Espejo had to explore the country as far as the Hopi or Moqui, he collected interesting ethnological data. Customs that appeared new as late as the second half of the last century were noted by him; and while his nomenclature of the Pueblos agrees in many points with that of the Coronado expedition, terms were added that have since been definitely adopted. Espejo's return to Mexico was to be followed by a definite occupancy of the Rio Grande country, but his untimely death prevented it, and the subsequent plan of colonization, framed and proposed by Juan Bautista de Lomas Colmenares, led to no practical results, as likewise did the ill-fated expedition of Humana, Bonilla, and Leyva, the disastrous end of which in the plains became known only through a few vestiges of information and by hearsay. Seven years after Espejo's journey, Gaspar Castano de Sosa penetrated to the Rio Grande near the present village of Santo Domingo. The report thereon is explicit and sober, and in it we find the first mention of the Spanish names by which some of the Pueblos have since become known. From this report it is easy to follow the route taken by Castano and his followers, but the account is incomplete, terminating abruptly at Santo Domingo, whither Castano had been followed by Captain Juan de Morlete, who was sent after him by the governor of what is now Coahuila, without whose permission Castano had undertaken the journey. I have no knowledge as yet of any document giving an account of the return of the expedition. Seven years more elapsed ere the permanent occupancy of New Mexico was effected under the leadership of Juan de Onate. Thenceforward events in that province became the subject of uninterrupted documentary record.