SUEVEY OF COLORADO AND NEW, MEXICO. 5 



the artist, lias labored witli untiring zeal, and has made more than four 

 hundred outlines of sketches, and about seventy finished ones for the 

 final reports. Each one of these sketches illustrates some thought or 

 principle in geology, and, if properly engraved, will be invaluable. My 

 principal assistant, Mr. James Stevenson, who has been associated with 

 me in my western explorations for many years, has rendered me indis- 

 pensable services throughout the entire trip. 



I beg permission to state here that my ai3propriation was so limited 

 that had it not been for the kindness and generosity of the military 

 authorities of the country, I could have accomx^lished but a small 

 portion of the work that I have performed during the present season, 

 and I take this opportunity to say that the West is very largely indebted 

 to them for whatever benefit my labors have been or may be to the 

 country. 



Before leaving Washington, I made application by letter to General 

 Sherman, commanding the armies of the United States, for such assist- 

 ance from the military authorities of the West as could be afforded to 

 me without manifest injury to the public service. On my letter of appli- 

 cation, General Sherman placed the following indorsement : 



" This application is referred to the commanding officers of the depart- 

 ments, districts, and posts, who will extend to Professor Hayden's iDarty 

 the usual courtesies, and the privilege of purchasing a limited quantity of 

 provisions on the same terms as officers." 



Similar indorsements w^ere made by Generals Sheridan, Schofield, and 

 Augur. The greater part of my outfit was supplied to me by Colonel E. 

 B. Carling, United States army, depot quartermaster at Fort D. A. Eus- 

 sell, Wyoming Territory ; and I cannot express too cordially my grateful 

 acknowledgments to him for his generous aid, not only for this season, 

 but also for two previous campaigns. I am also under equal obligation 

 to General William Myers, United States Army, chief quartermaster 

 department of the Platte, at Omaha, for invaluable aid in several past 

 years. When we came in the vicinity of a military post, at Fort Union,. 

 Santa Fe, or Fort Garland, we received all the aid we needed. 



I would also extend my grateful acknowledgments to the press and the 

 citizens of Colorado and New Mexico, but more especially to Colorado 

 for their cordial aid and sympathy in all my explorations. 



If my labors have added anything to the sum of human knowledge and 

 the honor of our country, I shall be content. 



I remain very respectfully, your obedient servant, 



F. Y. HAYDEI^, 

 United States Geologist, 



Hon. J. D. Cox, 



Secretary of the Interior. 



