6o 
CA VE AND CLIFF D WELLERS . 
all gathered together at home. The 
earthquake must have been a very severe 
one, and have brought down the large 
buildings upon the occupants before they 
could escape. This region is not espe¬ 
cially liable to such disasters. That it 
has them, however, occasionally, and 
severe ones too, is shown by the Bavispe 
earthquake of a few years ago, when that 
town was destroyed, some forty people 
killed, and the whole country shaken up. 
Mr. Davis goes on with his theory that 
the survivors were thus exposed to the 
mercy of their enemies (that they had 
enemies before is shown by their fortifi¬ 
cations adjoining almost every village), 
and became cliff dwellers as a last resource 
to escape the fury of their old assailants. 
These, probably, were savages by com¬ 
parison ; and, living in savage homes, as 
