But apparently there came a time when the Cliff Dwellers either abandoned their gardens and fortresses or were killed. It is possible that the climate of the plateau region became more arid and that many of the springs dried up, for there is no water now within long distances of some of the ruins. It is, perhaps, more probable that the attacks of the savages became so frequent that the Cliff Dwellers were driven from their little farms and were no longer able to procure food. Those who were not killed by enemies or by starvation retreated southward and gathered in a few large villages, or pueblos, where they were still resisting the attacks of their enemies at the time of the coming of the early Spanish explorers. [Illustration: FIG. 76.--PUEBLO OF TAOS, NEW MEXICO] A careful study of the early inhabitants of America reveals the fact that the Pueblo Indians are the descendants of the race of Cliff Dwellers. Their houses, their pottery, and their religious ceremonies are, so far as can be determined, very similar to those of the Cliff Dwellers. If you travel through northwestern New Mexico and northeastern Arizona, you will find the villages situated upon commanding rocks which are often surrounded by almost inaccessible cliffs. To these elevated villages all the food and water has to be carried from the valleys below. The houses are solidly built of stone, and rise, terrace-fashion, several stories in height, each succeeding story standing a little back of the one below. These houses can be entered only by a ladder from the outside. In time of danger the ladders are drawn up so that the walls cannot be easily scaled. There are a number of groups of the Pueblo Indians, but the Zuni and Moki are perhaps as interesting as any of them. [Illustration: FIG. 77.--GRINDING GRAIN, LAGUNA, NEW MEXICO] Wonderful indeed are some of the pueblo villages which were still occupied at the time of the coming of the Spanish, more than three centuries and a half ago. As in the pueblos now occupied, there were no separate family houses. The people of an entire pueblo lived in one great building of many rooms. Some of the pueblos were semi-circular, with a vertical wall upon the outside, while upon the inside the successive stories formed a series of huge steps similar to the tiers of seats in an ancient amphitheatre. [Illustration: FIG. 78.--THE ENCHANTED MESA The summit was once the site of an Indian pueblo]