UNITED STATES 
DEPARTMENT OF THE INTERIOR 
NATIONAL PARK SERVICE 
Yellowstone Paik, Wyo., 
April 10, 1930. 
Dr. W. H. Holmes, 
Cosmos Club, 
Washington, D. C. 
My dear Doctor Holmes: 
After leaving you I enjoyed a splendid visit with 
W. H. Jackson. Prom him I obtained a fine series of old prints 
showing individuals who participated in the early Geological 
Survey activities in Yellowstone. I discovered, however, that 
none of the six pictures included in your diary were represented 
in the Geological Survey collection or in the personal collection 
possessed by Mr. Jackson, Should it not be too much trouble I 
should be glad to have one of your photographers copy your pictures 
and supply us with the negatives. We shall of course gladly meet 
the expenses involved. 
My talk with you was a most enjoyable experience and your 
kindness in supplying a carbon copy of your Yellowstone diary is 
greatly appreciated by me and by the Paik Service. The copy has 
now taken a place in the Yellowstone files and will be of particular 
service in the preparation of our histoiy exhibits. 
I wish that I might have the opportunity to take you about 
the present day Yellowstone and learn from you of your pioneer ex- 
periences here. Should you come to Yellowstone this summer please 
let me know of your plan. 
Gratefully yours, r\ r\ 
C. P. Russell, V 
Field Naturalist. 
