The ventilator of kiva A, as will be seen later, does not open through the front wall, as is usually the case, but on one side. This is accounted for by the presence of a room on this side of the kiva. Rooms 2, 3, 4 were constructed after the walls of kiva A were built, hence several modifications were necessary in the prescribed plan of building these rooms.
The foundation of the inclosure, 5, conforms on one side to the outer wall of the village, and on the other to the curvature of kiva B. As this inclosure does not seem ever to have been roofed, it is probable that it was not a house. A fireplace at one end indicates that cooking was formerly done here. It is instructive to note that the front wall of the ruin begins at this place.
Rooms 6, 7, 8, which lie side by side, closely resemble one another, having much in common. They were evidently dwellings, and may have been sleeping-places for families. Rooms 7 and 8 were two stories high, the floor of no. 8 being on a level with the adjoining plaza. Room 9 is so unusual in its construction that it can not be regarded as a living room. It was used as a mortuary chamber, evidences being strong that it was opened from time to time for new interments. Room 12 also was a ceremonial chamber, and, like the preceding, will be considered later at greater length. The walls of the two rooms, 10 and 11, are low, projecting into plaza C, of whose border they form a part. Near them, or in one corner of the same plaza, is a bin, the sides of which are formed of stone slabs set on edge. The use of this bin is problematical.
The front wall of room 15 had been almost wholly destroyed before the repair work began, and was so unstable that it was necessary to erect a buttress to support it. This room, which is one story high, is irregular in shape; its doorways open into rooms 14 and 16. The walls of rooms 16 and 18 extend to the roof of the cave, shutting out the light on one side from the great refuse-place in the rear of the cliff-dwellings. The openings through the walls of these rooms into this darkened area have been much broken by vandals, and the walls greatly damaged. Room 17, like 16 and 18, is somewhat larger than most of the apartments in Spruce-tree House.
Theoretically it may be supposed that when Spruce-tree House was first settled it had one clan occupying a cluster of rooms, 1-11, and one ceremonial room, kiva A. As the place grew three other “unit types” centering about kivas C-H were added, and still later each of these units was enlarged and new kivas were built in each section. Thus A was enlarged by addition of B; C by addition of D; E by addition of F; and G was subordinated to H. In this way the rooms near the kivas grew in numbers. The block of rooms designated 50-53 is not accounted for, however, in this theory.
Rooms numbered 19-22 are instructive. Their walls are well preserved and form the east side of plaza C. These walls extend from the level of the plaza to the top of the cavern, and in places show some of the best masonry in Spruce-tree House. Just in front of room 19, situated on the left-hand side as one enters the doorway, is a covered recess, where probably ceremonial bread was baked or otherwise cooked. This place bears a strong resemblance to recesses found in Hopi villages, especially as in its floor is set a cooking-pot made of earthenware. Rooms 19-21 are two stories high; there are fireplaces in the corners and doorways on the front sides. The upper stories were approached and entered by balconies. The holes in which formerly rested the beams that supported these balconies can be clearly seen.
Rooms 21 and 22 are three stories high, the entrances to the three tiers being seen in the accompanying view ([pl. 6]). The beams that once supported the balcony of the third story resemble those of the first story; they project from the wall that forms the front of room 29.
The external entrance to room 24 opens directly on the plaza. Some of the rafters of this room still remain, and near the rear door is a projecting wall, in the corner of which is a fireplace. Although room 25 is three stories high, it does not reach to the cave top. None of the roofs of the rooms one over another are intact, and the west side of the second and third stories is very much broken. The plaster of the second-story walls is decorated with mural paintings that will be considered more fully under Pictographs. It is not evident how entrance through the doorway of the second story was made unless we suppose that there was a notched log, or ladder, for that purpose resting on the ground. In order to strengthen the north wall of room 25 it was braced against the walls of outer rooms by constructing masonry above the doorway that leads from plaza D to room 26. This tied all three walls together and imparted corresponding strength to the whole.