The inhabitants of the Verde valley were an agricultural people, and even in the darkest days of their history, when they were compelled to abandon the minor settlements, they still relied on horticulture for subsistence, and to a certain extent the defense motive was subordinated to the requirements of this method of life. There can be no doubt that the hostile pressure which produced the larger villages was Indian, probably the Apache and Walapai, who were in undisputed possession at the time of the American advent, and but little doubt that this pressure consisted not of regular invasions and set sieges, but of sudden raids and descents upon the fields, resulting in the carrying off of the produce and the killing of the producers. Such raids were often made by the Navajo on Tusayan, Zuñi, and the eastern pueblos and on the Mexican villages along the Rio Grande for some years after the American occupation, and are continued even today in a small way on the Tusayan. The effect of such raids is cumulative, and it might be several years before important action would result on the part of the village Indians subjected to them. On the other hand, several long seasons might elapse during which comparative immunity would be enjoyed by the village. In the lower Verde there is evidence of two such periods, if not more, and during that time the small pueblos and settlements previously referred to were built. None of these small settlements was occupied, however, for more than a few decades, the ground plans of most of them indicating an even shorter period. That cavate lodges and cliff-dwellings are simply varieties of the same phase of life, and that life an agricultural one, is a conclusion, supported by the remains in the lower Verde valley. The almost entire absence of cliff-dwellings and the great abundance of cavate lodges has already been commented on, and as the geologic formations are favorable to the latter, and unfavorable to the former on the Verde, whereas the Canyon de Chelly, where there are hundreds of cliff-dwellings and no cavate lodges, the conditions are reversed, this abundance of cavate lodges may be set down as due to an accident of environment. The cavate lodge of the Rio Verde is a more easily constructed and more convenient habitation than the cliff-dwelling of Canyon de Chelly. [Illustration: Plate XLIX. DOORWAY TO CAVATE LODGE.]