64 
ANIMALS OF NORTH AMERICA. 
of the beaver to support the roof. The entrance is always 
under water : and travellers who assert that . heavers have 
two doors to their houses, one on the land side, and the other 
in the water, seem to be less acquainted with these animals 
than those who assign them elegant apartments. Such a 
construction would render their houses of no use, either to 
guard them from the attacks of their enemies, or against 
extremely cold weather. 
