LIST OF ILLUSTRATIONS 



Pigeon and Turret Peaks from Emerald 



Lake Frontispiece 



FACING PAGE 



The way of the wind timber-line . . 4 



Evolution of the horse 5 



The spring break-up 20 



An old sea bottom ... ... 21 



Aspen beaver cuttings 52 



Long's Peak above a storm .... 53 



The shortest day of the year in the Rocky 



Mountains 68 



The outlet of Fern Lake ..... 69 



A black bear cub . . . 116 



Bear claw marks on aspens .... 117 



Part of the beaver canal 132 



Last climb on Long's Peak .... 133 



A snow slideway through the woods . . 188 



Snowslide wreckage 189 



A bighorn eats salt from the hand of 



Enos A. Mills 228 



xiii 



