30 
CAVE AND CUFF DWELLERS. 
used formerly as a customhouse post of 
observation, but the Apache chief Geron- 
imo, raiding through here, collected a 
poll tax of one scalp apiece, and since 
then the post has been abandoned. A 
short distance further the river changes 
from the Boca Grande to the Casas 
Grandes. 
The Boca Grande and the Casas 
Grandes are the same river, like the 
Wind River and the Biof Horn in our 
own country, the two changing names at 
a certain point. In other words, they 
have the same river bed, for in the dry- 
est seasons the Casas Grandes sinks 
and reappears further down as the Boca 
Grande, the two streams being really 
identical most of the way, however, and 
both of them emptying into the great 
“sink” known as Laguna Guzman. I 
