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Show 170 Beyond these ruins is an i iterval of 69 meters, where the summit of the rock is narrow and smooth, and the dip on the west * ide 55°. The walls of an oval building follow, ( Fig. 1,) which inclose a space of 4.69 meters. They are 2 to 2 | feet in thickness, and stand 8 feet high on the western side; the eastern wall stands on the sheer edge of the precipice. A building adjoins, with the dividing- wall common to the preceding house. Its east and west walls stand on parallel ledges of the sandstone strata, whose strike does not exactly coincide with the axis of the hog- back. Diameter of this in-closure 5.37 meters. A space of 15.4 meters follows, with precipices on both sides, when we reach house No. 6. The eastern wall stands 5 feet high on the summit of the precipice, from which a stone might bo dropped to the ground, perhaps 350 feet below. Only 8 feet of the western wall remained at the time of my examination. The inclosnro • is 6.04 meters loug, and not quite so wide, and is divided transversely by a wall, which cuts off less than one- third the length of the apartment. In one of the opposite corner** of the larger room is the stump of a cedar- post 5 inches in diameter. This house can only be reached by climbing over narrow ledges and steep faces of rock. House No. 7 follows an iuterval of 42.30 meters. Its foundation- wall iucloses an irregular square space 4.70 meters loug and 3.69 meters wide; it is 11 feet high on the western side, and very regularly built and well preserved ; on the east side it is 8 feet high, aud is interrupted by a door- way of regular form. From this a tiarrow fissure offers a precarious hold for descent for a considerable distance down the face of the precipice, but whether passable to the bottom I could not ascertain. FIG. 5.- A'iew of house No. 24. The crest of the ridge is without ruins for 52.34 meters farther; then a building follows whose inclosed space is au irregular circle of 4.70 meters diameter. A transverse summit- ledge forms its southern wall, but the remaining portion is remarkably massive, measuring 3 feet in thickness. Its western wall is 12 feet high, aud contains many huge stones, which four or five men could not lift unaided by machinery. Several scrub- oaks of 3 inches in diameter grow in this chamber, and stumps of the cedar-posts that supported the roof remain. Here follows a row of ten similar ruined houses, measuriug from 3.35 to 6.24 meters in length. Of this number, thirteen are remarkable for containing a scrub- oak of 13 inches iu diameter, the largest that I have seen in the country, and the species is an abundant one. In No. 14, the remaining western wall is 15 feet iu height. There was a good deil of pottery lying on the western slope of the rock, but of flint implements and chips I found but f^. w. All of these ruins contain full- grown sage bushes. No. 18 is the largest ruin; the length of its inclosure is 8.62 meters, and the width 6.71 meters: its west wall is 6 feet high; the floor is overgrown with sage of the largest size. This building stood 51 meters from No. 17; 12.80 meters northward the ridge descends slightly to the level of the causeway already mentioned. Here are five more ruined buildings of the same average size as the others, interrupted by but oue short interval. From this depression, that part of the hog- back which is north of the causeway rises abruptly in a perpendicular face. It is composed principally of two layers of the sandstone, clipping at 45° W., which are separated by a deep cavity from a point 15 feet from the base upward. This niche has been appropriated for a habitation, for it is walled to a height of 8 feet from its base. The foot of the wall is quite inaccessible, |