2 
STRANGE DWELLINGS. 
constructed without the aid of hands, and are planned, not by- 
reason, but by instinct. We pass, therefore, from the handiwork 
of man to those dwellings which are constructed with feet or 
jaws or beaks, and which are never marred by incompetence or 
improved by practice. 
FORTRESS OF THE MOLE. 
Of all the mammalia, the Mole is entitled to take the first 
place in our list of burrowers. 
This extraordinary animal does not merely dig tunnels in the 
DSI; 
