Cave-shelters, with the orifice of the oval and circular crevices in the rocks walled up with neat masonry and accessible by means of niche-steps for the hands and feet, leading up the perpendicular cliff to the little nest-like houses above, were especially numerous. In one of these a skeleton was found, but examination proved it to be that of a Navajo, and quite certainly not that of one of the ancient residents. At different points midway down the cañon, narrow promontories jut out into the valley a hundred yards or more, ranging from twenty to one hundred feet in height. Within a distance of sixteen miles, eighteen of these were observed, covered with ruins of massive stone-built structures. They were rectangular in form, ranging from one hundred by two hundred feet, down to thirty by forty feet in size. We cannot devote further attention to the vast number of ruins found by Mr. Jackson and party in the Montezuma Valley, except to note the curious little house shown in the cut. [Illustration: Cave-Dwelling in the Montezuma Valley.] Among a colony of these cave-dwellings, occurring at the first bend of the West Montezuma, a dozen miles above its junction with the east fork, this one commands attention as much for the neatness and perfection of its masonry as for the snug little cave in which its architect lodged it. A block of sandstone resting on the edge of the mesa bench fifty feet above the valley, had a deep oval hole worn in it by the winds and sands. This was occupied by the little house, ten feet long, six feet high and five feet deep; a space, however, was reserved at one end to serve as a platform from which to enter.