98 CASA GRANDE. ARIZONA [PrH. ANN. 28 
place, which itself was situated not in the center of the room but 
slightly nearer one side. The existence of these floors, or evidences 
of rooms situated one above the other, would seem to indicate that a 
considerable portion of this pyramid was formed by accumulations 
of earth resulting from the decay of habitations; the supposition 
is that this accumulation continued through a long period, and 
that new habitations were built on the débris of those below. Exca- 
vations extended in the southwest angle of the pyramid to a level 
with the outside plazas showed that there were in this mound seven 
layers of floors, indicating by the above theory seven successive con- 
structions or times of habitation. 
PYRAMID B 
Pyramid B (pl. 34), which is situated in the southwest section of 
Compound B, is separated in part from the west wall of the compound ~ 
by a plaza 100 feet long by 50 feet wide. The pyramidal form, so 
well seen in Pyramid A, does not appear in Pyramid B (pl. 36, 8), 
the shape of which is trisquare, a mound extending north and south 
with a western extension. On the top of this mound, as on Pyra- 
mid A, were found floors of houses whose upright walls were indi- 
cated by decayed posts; below were other floors, resembling those 
found on top of Pyramid A. There were remains of a shrine (pls. 
26, 35) at the southwest corner of the top of Pyramid B; in it were 
found fragments of copper and many strangely-formed stones. The 
north end of Pyramid B (pl. 35), extending toward the west wall 
of the compound and forming the north wall of the southwest plaza, 
was occupied by two rooms, the massive walls of which are 8 feet 
high and average 4 feet thick. The ground plan of these rooms 
resembles in shape a trisquare. Their common west wall is separated 
from the west wall of the compound by a passageway, through which 
one formerly could enter the southwest plaza from the central plaza.' 
The walls show no indication of a side entrance, and no proof was 
obtained that the rooms were roofed; the most logical supposition 
is that they were entered from the top of the adjacent mound by 
means of ladders or notched logs. Each of these rooms had a 
fireplace near the middle of the room, well-plastered floors, and 
vertical walls; they have no lateral openings for communication 
with each other. ns 
In one of these rooms was found a mass of caliche about the size 
of a small keg, which had a cavity in one end, while the opposite 
extremity was rounded. This object resembled a rude stove or 
1 These narrow passageways exist also in Compound A, as between Font’s room and the massive-walled 
structures east of the main building. 
