As the jambs, sills, and lintels were built hard and fast in the mortar, evidently both door openings and windows were constructed when the corresponding wall was built. The jambs in some instances and the lintels in others are of split sticks, the surfaces of which are fibrous and were evidently not split by means of iron implements. There is evidence that the size of the door openings was sometimes reduced by a ridge of mortar which was arched above, as at Spruce-tree House, the intention being to make in this way a jamb to hold in place the stone door. There are no round windows of large size, but both doors and windows are quadrilateral in shape; the small circular openings in some of the walls may have served for lookouts. FLOORS AND ROOFS Not a single entire roof remained in Cliff Palace, and only one or two rooms retained remnants of rafters. It would seem, however, from the position of the holes in the walls into which the rafters once extended that they were constructed like those of Spruce-tree House, a good example of which is shown in plate 9 of the report on that ruin. The floors seem to have been formed of clay hardened by tramping, but there is no evidence of paving with flat stones. The hardened adobe is sometimes laid on sticks without bark and stamped down. Although no instance of extensive rock cutting of the floor was observed in secular rooms, this is a common feature of kiva floors. Floors were generally level, but in some instances, when rock was encountered, the surface was raised in part above the other level. The majority of the floors had been dug into for buried specimens before the repair work was begun, but here and there fragments of floors were still intact, showing their former level. Banquettes or ledges around the walls are rare. In a few instances the unplastered roof of the cave served as the roof of the highest rooms. FIREPLACES Many fireplaces still remain in rooms, but the majority are found in convenient corners of the plazas[34]. The most common situation is in an angle formed by two walls; in which case the fire-pit is generally rimmed with a slightly elevated rounded ridge of adobe. In room 84 there is a fireplace in the middle of the floor. At one side of this depression there extends a supplementary groove in the floor, rimmed with stone, the use of which is not known. Although fireplaces are ordinarily half round, a square one occurs in the northwestern corner of room 81. All the fireplaces contained wood ashes, sometimes packed hard; but no cinders, large fragments of charcoal, or coal ashes were evident. The sides of the walls above the fireplaces are generally blackened with smoke. [Footnote 34: Smoke on the walls of certain second and third stories shows that fireplaces were not restricted to the ground floor.]