126 PROCEEDINGS MANCHESO'ER INSTITUTE 



The earlier inliabitants were driven farther northward, or betook 

 themselves to the mountains, while the invaders occupied the 

 lowlands, where they remain to this day, and where they must 

 remain for many centuries, perhaps for many thousands of 

 years, to come. For, with the recurrence of each season of re- 

 production, the cold of the higher levels and of the more north- 

 ern latitudes sets a bound beyond which they cannot hope to 

 rear their young. 



I 



