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 in one place about twenty feet wide. Here there are some evidences that a spring of water was inclosed in a reservoir by means of masonry. The building is in two sections, separated by this break, of which the main one is five hundred and ten feet long, and the smallest one hundred and twenty feet, forming a nearly continuous front. They stand back ten or fifteen feet from the verge of the bluff, and are built of tabular pieces of sandstone and adobe mortar. Numerous pit-holes in each structure indicate the chambers and the line of the inclosing walls. The removal of the loose material would doubtless disclose the ground-plan, but it would involve immense labor. With the Ute Mountain rising majestically in the background, and the broad valley in front, the situation of the pueblo is remarkably fine.

The Round Tower is the most singular feature in this structure. While it resembles the ordinary estufa, common to all these structures, it differs from them in having three concentric walls. No doorways are visible in the portion still standing, consequently it must have been entered through the roof, in which respect it agrees with the ordinary estufa The inner chamber is about twenty feet in diameter, and the spaces between the encircling walls are about two feet each; the walls are about two feet in thickness, and were laid up mainly with stones about four inches square, and, for the most part, in courses. There is a similar round tower, having but two concentric walls, at the head of the McElmo Cañon, and near the ranch of Mr. Mitchell. It is shown in Fig. 44, and stands entirely isolated. The diameter of the tower is thirty-four feet, of which the inner chamber is twenty-three feet; the space between the two walls is about six feet, and the thickness of the walls about two feet six inches. It is laid up in the same manner as the one last named, with stones about the same size, and the walls still standing are about five feet in height. Partition walls divide the outer space, one of which measured twenty inches in thickness.

Several hundred feet from the pueblo last named, further down the valley, is another pueblo of large extent, and in a very ruined condition.

A mile or more below the ranch of Mr. Mitchell, in the bordering walls of the McElmo Cañon, are two cliff houses. The walls of the bluff are here about twenty feet high, with large cavities formed in them here