The method of roofing a kiva of the subtype may be clearly observed in the kiva of Scaffold House in the Navaho National Monument.[61] The rafters here are parallel, and extend across the top of the kiva, their ends resting on the wall. The middle beam, which is the largest, is flanked on each side by another. Upon these supporting beams are laid others at right angles, and on these were placed the brush, bark, and clay that covered the roof. Entrance was gained by means of a hatchway on one side of the roof near the large banquette, which occupies a position, as respects the entrance and the place supposedly occupied by the ladder and the fire-pit, similar to the spectator's platform of a modern rectangular Hopi kiva, except that it is higher above the floor and is relatively smaller. If the banquettes were depressed and enlarged into a platform, the form of the kiva being changed from circular to rectangular, thus modified the banquette would form a structure like the spectator's platform of a typical modern Hopi kiva.[62] [Footnote 61: See _Bulletin 50, Bureau of American Ethnology_.] [Footnote 62: The two circular kivas of Kukuchomo, near Sikyatki, have this large banquette and in other respects resemble the ruins of Canyon de Chelly. Kukuchomo marks the site of a settlement, of the Coyote clan of the Hopi in prehistoric times.] Perhaps of all the ceremonial rooms repaired the walls of kiva M were in the most dangerous condition. The front of the northern wall of room 39 had been undermined and was without foundation, hanging without basal support except at the ends. A support was constructed under this hanging wall, and to give additional strength the foundations were rebuilt a little broader at the base than formerly, causing the wall to bulge almost imperceptibly into the kiva. Although no pilasters were seen, the deep banquette on the northwestern side places it among the kivas of the first type. KIVAS OF THE SECOND TYPE The architecture of the two kivas O and R are so different from those already considered that they are set apart from the others in a second type. The form and structure of kiva W indicate that this room also may be classed as of the same type. In the side canyon north of that in which Cliff Palace is situated, where water was obtained throughout the summer, there is another kiva, also supposed to belong to the second type.[63] [Footnote 63: As a huge rock had fallen from the roof of the cave in which this kiva lies, since it was first occupied, it would appear that the place was abandoned on that account.]