In proportion as they advanced up the Rio Grande, these explorers found everywhere very populous towns. The people lived well and contentedly. Some were found who had even kept the faith taught them by Christians,[10] long ago, but in general they worshipped idols in temples built for the purpose. In the natives themselves the Spaniards remarked a wide difference. Some went almost naked, and lived in poor hovels of mud covered with straw thatch. Others, again, would be clothed in skins, and live in houses four stories high. Often the natives showed the Spaniards cotton mantles skilfully woven in stripes of white and blue, of their own making and dyeing, which were much admired. It seemed for the most part a land of thrift and plenty, for the towns were populous beyond any thing the Spaniards had ever dreamed of. And the farther north the explorers went, the better the condition of the people became. Finding themselves in a land much like Old Mexico, in respect of its mountains, rivers, and forests, the explorers gave it the name of New Mexico. One of the greatest towns visited, called Acoma,[11] contained above six thousand persons. It was built upon the level top of a high cliff, with no other way of access to it than by steps hewn out of the solid rock which formed the cliff. The sight of this place made the Spaniards wonder not a little at the skill and foresight shown in planning and building these natural fortresses, which nothing but famine could conquer. All the water was kept in cisterns. But this was not all the aptitude these people showed in overcoming obstacles or supplying needs. Their cornfields lay at some distance from the town. In this country it hardly ever rains. So the want of rain to make the corn grow was supplied by digging ditches to bring the water from a neighboring stream into the fields. We therefore see how conditions of soil and climate had taught the Indians the uses of irrigation.[12] Turning out of the valley of the Rio Grande, to the west, the explorers at length came to the province of Zuñi, where many Spanish crosses were found standing just as Coronado had left them forty years before. Here our Spaniards heard of a very great lake, situated at a great distance, where a people dwelt who wore bracelets and earrings of gold. Part of the company were desirous of going thither at once, but the rest wished to return into New Biscay in order to give an account of all they had seen and heard. So only the leader with a few men went forward, meeting everywhere good treatment from the natives, who in one place, we are told, showered down meal before the Spaniards, for their horses to tread upon, feasting and caressing their strange visitors as long as they remained among them. [Illustration: ORGAN MOUNTAINS.]