of rooms was well provided with niches and holes in the walls, some
of them doubtless utilized as outlooks. On the left of the upper doorway
are two holes, a foot apart, about 4 inches in diameter, and smoothly
finished. Almost directly above these some 3 feet, and about 2 feet
higher than the top of the door, there are two similar holes. Near the
southern end of the room in the same wall there is another round opening
a trifle larger and about 41/2 feet above the floor level. In the western
wall there are two similar openings, and there is one each in the
northern and southern walls. All these openings are circular, of small
diameter, and are in the upper or third story, as shown on the
elevations herewith, figure 330. The frequency of openings in the upper
or third story and their absence on lower levels, except the specially
arranged openings described later, supports the hypothesis that none of
the rooms except the middle one were ever more than two stories high and
that the wall remains above the second roof level represent a low
parapet.

[Illustration: Pl. LVIII: Square Opening in South Room.]

In the second story, or middle room of the middle tier, there were no
openings except the doorway in the eastern wall and two small orifices
in the western wall. In the middle of this wall there is a niche about
18 inches below the roof, and a foot below this is a round-cornered
opening measuring about 7 by 8 inches extending through the wall. This
opening was on a level with another in the western wall of the western
room, and commanded a far-reaching though contracted view toward the
west. Below and a little northward is a similar though somewhat larger
opening corresponding to an opening in the western wall of the western
room.

[Illustration: Fig. 330.--Elevations of walls, middle room.]

The upper doorway in the western wall of the western room is much broken
out, but the top can still be traced. It was 4 feet 51/2 inches in height
and 1 foot 11 inches wide at top. The opening was blocked by solid
masonry built into it and completely filling it up to within 10 inches
of the top. This upper space, which is on a level with the upper hole in
the middle room, seems to have been purposely left to allow an outlook
from that room. The filling block is level on top and flush with the
wall inside and out. At a height of 12 inches above the lower edge of
the floor beams below it, and perhaps 3 inches above the floor, is the