LETTER OF TRANSMITTAL. 



UNITED STATES ENGINEER'S OFFICE, 



Hock Island, III., June 18, 1875. 



GENERAL : I have this day forwarded to you the Geological Report of Dr. J. S. 

 Newberry, geologist of the San Juan exploration party, which went from Santa Fd, 

 New Mexico, to the vicinity of the junction of Grand and Green Rivers, in Utah, and 

 back to Santa Fc, in the summer of 1859, and which party was in my charge. 



This is the report to which I alluded in my report to you of November 1, 1860, 

 MS setting forth wha.te.ver the route above mentioned afforded of interest to the public 

 at large or to the man of science. I trust it may be found possible to publish it. 



The report is arranged in seven chapters, with a prefatory note, and is accom- 

 panied by the following sketches and drawings, viz: 



p]leven water-color sketches, showing characteristic scenery of the region in 

 Northwestern New Mexico, Southwestern Colorado, and Southeastern Utah. Also, 

 eleven drawings (eight of fossils and three of scenery), all of which are interesting and 

 important in connection with the report. 



My map of the route was engraved on a steel plate, and is on the files of the 

 Engineer Department. 



I remain, very respectfully, your most obedient, servant, 



J. N. MACOMB, 



Colonel of Engineers, United States Army. 

 Brig. Gen. A. A. HUMPHREYS, 



Chief of Engineers, United States Army. 



