Biographical Notice 



survey was possible which would be 

 far in advance of anything done in 

 the geological survey of California, 

 or any other geological work previ- 

 ously done in the western mountain- 

 system. 



" Sitting on the high peaks of the 

 Sierra, overlooking the deserts and 

 ranges of Nevada to the eastward, 

 we worked out the general outlines 

 of the 40th-parallel survey-work. It 

 was the natural outgrowth of our 

 journey across the plains, our experi- 

 ence on the California survey, and 

 our exploration of Arizona, coupled 

 with King's great aggressive energy 

 and consciousness of power to per- 

 suade men to do the thing that he 

 thought ought to be done. 



" Our study of the structure of the 

 continent in our journey of 1863 

 across the plains, and in our Arizona 

 trip of 1865, led us to feel that the 

 survey of California and the prob- 

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