GEOLOGICAL SUEVEY OF THE TEREITOEIES. 



Although my party the past season was unusually large, involving 

 increased labor and responsibility in its management, I gladly bear testi. 

 mouy to the uniform zeal and interest of the members in its success. 



My principal assistant, Mr. James Stevenson, labored with his usual 

 efficiencj^ and fidelity throughout the entire trip. In honor of his great 

 services not only during the past season, but for over twelve years 

 of unremitting toil as my assistant, oftentimes without pecuniary 

 reward, and with little of the scientific recognition that usually comes 

 to the original explorer, I have desired that one of the principal islands 

 of the lake and one of the noble peaks reflected in its clear waters should 

 bear his name forever. 



Mr. Elliott labored with his usual zeal and efficiency, and, besides great 

 numbers of sketches, he constructed sections of the entire routes traversed 

 during the season. Assisted by Mr. Carrington, he made the circuit of 

 the lake in our little boat, and sketched the entire shore-line with care- 

 Mr. William H. Jackson performed his duties with great zeal, and the 

 results of his labors have been and will continue to be of the highest 

 value. During the season he obtained nearly 400 negatives of the 

 remarkable scenery of the routes, as well as the canon, falls, lakes, gey- 

 sers, and hot springs of the Yellowstone Basin, and they have proved^ 

 since our return, of very great value in the preparation of the maps and 

 rep or t- 



Dr. C. S. Turnbull acted as physician and general assistant, and by 

 his great fidelity in the performance of his duties rendered himself a 

 useful and valued meniber of the party. 



Mr. Campbell Garrington had charge of the zoological collections dur- 

 ing the years ISfO and 1871, and performed his duties with great zeal 

 and efficiency. His collections of fish and reptiles are quite complete. 

 He was assisted by Messrs. Dawes, Logan, Kegley, and Duncan. 



The reports of Professor Thomas and Dr. Peale, which are herewith 

 appended, will speak for themselves. Prof. G-. JST. Allen acted as botan- 

 ist with great success, as far aS Fort Ellis, and was assisted by Mr. 

 Eobert Adams. After Prof. Allen's departure, Mr. Adams took charge 

 of the botanical collections. The report of Prof. Porter will show the 

 results of their labors in the field. 



The loss of my chief topographer, Mr. Anton Schoiiborn, whose death 

 occurred at Omaha after he had returned from the trip, with the notes 

 which he had taken with zeal and ability, seemed almost irreparable. 

 On my arrival at Washington I applied to Prof. J. E. Hilgard,the able 

 assistant in charge of the United States Coast Survey Office, for aid in 

 my extremity. With his usual sympathy and prompt action in all mat- 

 ters pertaining to science, he at once placed Mr. Schonborn's field-uoteg 

 into the hands of Mr. E. Hergesheimer, in charge of the engraving di- 

 vision of the Coast Survey, and the result has been that Mr. Herges- 

 heimer has compiled and drawn a series of maps and charts of the sur- 

 vey, whose beauty and accuracy attest his skill as a topographer. Prof. 



