UP AND DOWN THE HEIGHTS 27 



phere ? One may easily imagine that he would go 

 wabbling helplessly over the granite boulders, unable 

 to lift himself more than a few feet in the air, while the 

 pipit and the leucosticte, inured to the heights, would 

 mount up to the sky and shout " Ha ! ha ! " in good- 

 natured raillery at the blue tenderfoot. And would the 

 feathered visitor feel a constriction in his chest and be 

 compelled to gasp for breath, as the human tourists 

 invariably do ? It is even doubtful whether any eastern 

 bird would be able to survive the changed meteorologi- 

 cal conditions, Nature having designed him for a differ- 

 ent environment. 



