TO 

 EDWARD W. NELSON 



One of the world's foremost field naturalists, who for thirty 

 years conducted natural history explorations in the wilder 

 areas of our continent from Arctic Alaska to Tropical Amer- 

 ica; who first revealed to science the White Sheep of our 

 Far North, and collected the types of the Wild Sheep of 

 the desert ranges of Southern California and Mexico. 

 His love of the wilderness, his studies in ethnology, his 

 zest in hunting, exploring, and collecting, his indomit- 

 able courage, and his high character and nobility of 

 manhood have been to me an ever-present inspiration. 



