W. H. H. 
Extracts from the 
UNITED STATES GEOLOGICAL SURVEY 
J. W. POWELL, DIR EC TOR 
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TERTIARY HISTORY OF THE GRAND CANON DISTRICT (With Atlas) 
By Clarence E. Dutton 
Captain of Ordnance U. S. A. 
The frontispiece in color and most of the other illus- 
trations are by W. H. Holmes. 
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"During the summer of 1880 I was so fortunate 
as to have the companionship and assistance of Mr. Holmes. 
His reputation as a f ield-geologist is already established 
by his work in connection with Dr. Hayden’s Survey. But 
besides rendering valuable assistance in working out 
geological details he made many sketches which he has 
reproduced in the pictures of the text and in the panoramas 
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of the Atlas. To praise such work would be superfluous. 
But I must call attention to a merit which may not be so 
obvious to one who has never seen the region, and this is 
the wonderful fidelity with which he portrays rock-charac- 
ters.” (Page viii , The Preface, by C. E. Dutton.) 
