40 CASA GRANDE, ARIZONA [BTH. ANN. 28 
SECOND SEASON 
The field work carried on in 1907-8 was devoted to Clan-house 1 
and to Compounds B, C, and D, beginning with an attempt to deter- 
mine the position of the surrounding wall of Compound B. The only 
indication of the existence of this wall was a low “platform,’’ or 
elevation, mentioned by several authors, rising a few feet above the 
surface of the plain. 
COMPOUND B 
The boundary wall of this compound was first encountered at its 
southeast angle and the first section to be laid bare was the~south 
wall. Having determined the course and length of this wall, the 
débris was removed from its foundation so that the wall stood clear 
for an average height of 3 feet. A drain was dug about 5 feet 
from the base to carry the surplus water into a depression a few 
hundred feet northwest of the compound. 
The determination of the east wall of Compound B was somewhat 
more difficult than that of the north and west walls because of a 
reconstruction, or change in direction, possibly by way of repair 
by the builders, at the southeast corner. The east wall was found 
to be for the greater part more massive than the south wall and 
more dilapidated on top than the other walls. The excavation of 
the north wall followed the completion of the work on the east, the 
débris about it being removed by means of scrapers. Provision 
was made for turning all drainage to the northwest corner where the 
level was somewhat lower than elsewhere; thence the water was 
conducted into a depression a hundred feet away. 
The subterranean. room under the northeast wall of Compound B 
was roofed over to prevent it being filled with water, which in course 
of time would have destroyed the floor and other evidences of its 
existence. The wall of the compound, which passes over’ this sub- 
terranean room, was in danger of falling. In order to prevent this 
a support made of masonry was placed under it, resting on the floor 
of the underground room. 
More earth had to be removed from the base of the west wall of 
Compound B than from all the others combined, a fact which suggests 
that formerly this wall was higher than the others but that a con- 
siderable portion had fallen or been worn down, burying the founda- 
tions. The task of carrying away earth that had fallen from the 
walls on the outer side and the removal of débris that had washed 
over it from a neighboring refuse-heap was a considerable one. When 
this work was finished the wall stood, in the middle, about 10 feet 
in height. 
The excavation of the plazas and rooms adjoining the two great 
pyramids, or inclosed mounds, of Compound B was not so difficult 
