Irrigating ditches and horticultural works were found in this region, but not in great abundance; perhaps a more careful and detailed examination would reveal a much larger number than are now known. Fine examples of irrigating ditches were found at the extreme northern and the extreme southern limits of the region here treated, and there is a fair presumption that other examples occur in the intermediate country. These works did not reach the magnitude of those found in the Gila and Salt river valleys, perhaps partly for the reason that the great fall of Verde river and its tributaries renders only short ditches necessary to bring the water out over the terraces, and also partly because irrigation is not here essential to successful horticulture. In good years fair crops can be obtained without irrigation, and today this method of farming is pursued to a limited extent. [Illustration: Plate XV. MAIN COURT, RUIN AT MOUTH OF THE EAST VERDE.] PLANS AND DESCRIPTIONS. STONE VILLAGES. Ruins of villages built of stone, either roughly dressed or merely selected, represent the highest degree of art in architecture attained by the aborigines of Verde valley, and the best example of this class of ruin is found on the eastern side of the river, about a mile above the mouth of Limestone creek. The site was selected without reference to defense, and is overlooked by the hills which circumscribe a large semicircular area of bottom land, on the northern end of which the village was located. This is the largest ruin on the Verde; it covers an area of about 450 feet square, or over 5 acres, and has some 225 rooms on the ground plan. From the amount of debris we may infer that most of the rooms were but one story in height; and a reasonable estimate of the total number of rooms in the village when it was occupied would make the number not greater than 300 rooms. The ratio of rooms to inhabitants in the present pueblos would give a population for this village of about 450 persons. Zuñi, the largest inhabited pueblo, covering an area of about 5 acres, has a population of 1,600. It will thus be seen that, while the area covered by this village was quite large, the population was comparatively small; in other words, the dense clustering and so-called beehive structure which characterize Zuñi and Taos, and are seen to a less extent in Oraibi, and which result from long-continued pressure of hostile tribes upon a village occupying a site not in itself easily defensible, has not been carried to such an extent here as in the examples cited. But it is also apparent that this village represents the beginning of the process which in time produces a village like Zuñi or Taos.