Room _b_ is an irregular, square chamber, two stories high, communicating with _a_ and _c_ by passages which are enlarged by breakage in the walls. A small hole in the front wall, about 6 feet from the floor, opens externally to the air. The walls are, in general, about 2 feet thick, and are composed of flat red stones laid in clay of the same color. The cliff forms the rear wall of the chamber. The clay at certain places in the walls, especially near the insertions of the beams and about the window openings, appears to have been mixed with a black pitch, which serves to harden the mixture. Room _c_ is the first of a series of chambers, with external passageways, but its walls are very much broken down, and the openings thereby enlarged. The front wall is almost straight and in one place stands 30 feet, the maximum height of the standing wall of the ruins. In one corner a considerable quantity of ashes and many evidences of fire, some of which may be ascribed to Apache occupants, was detected. A wooden beam, marking the line of the floor of a second story, was seen projecting from the front wall, and there are other evidences of a floor at this level. Large beams apparently extended from the front wall to the rear of the chamber, where they rested on a ledge in the cliff, and over these smaller sticks were laid side by side and at right angles to the beams. These in turn supported either flat stones or a layer of mud or clay. The method of construction of one of these roofs is typical of a Tusayan kiva, where ancient architectural forms are adhered to and best preserved. The entrance to room _d_ is very much enlarged by the disintegration of the wall, and apparently there was at this point a difference in level of the front wall, for there is evidence of rooms in advance of those connected with the chambers described, as shown by a line of masonry, still standing, parallel to the front face of inclosures _c_ and _d_. Room _e_ communicates by a doorway with the chamber marked _f_, and there is a small window in the same partition. This room had a raised banquette on the side toward the cliff, recalling an arrangement of the floor similar to that in the cavate dwellings opposite Squaw mountain which I have described. This platform is raised about three feet above the remainder of the floor of _f_, and, like it, is strewn with large slabs of stone, which have fallen from the overhanging roof. In the main floor, at one corner, near the platform, there is a rectangular box-like structure made of thin slabs of stone set on edge, suggesting the grinding bins of the Pueblos. Room _f_ communicates with _g_ by a passageway which has a stone lintel. The holes in the walls, in which beams were once inserted, are seen in several places at different levels above the floor. The ends of several beams, one extremity of which is invariably charred, were found set in the masonry, and others were dug from the débris in the floor.