APPENDIX SS. 1751 



of Asst. Surg. George A. Otis, curator. The notes taken are not in shape for publica- 

 tion, and are retained for future use. 



Specimens from mineral and thermal springs were shipped to Washington for analy- 

 sis promised by a government chemist; owing to a great press of business, as Ave were 

 informed, the waters were overlooked, and no report thereon can consequently be fur- 

 nished. 



In accordance with instructions, outline and brush sketches in pencil and water- 

 color were taken at various j>oints, a few of which are transmitted. 



An effort has been made to render the report as interesting as possible, the great 

 drawback being that no money was available for assistance or other purposes during 

 the reconnaissance and pending the preparation of the report ; in consequence thereof, 

 both labor and time, which they could illy afford to spare, had to be asked of scientific 

 men in the specialties hereafter treated. 



I desire to tender my thanks to all who have furnished me information and aid at 

 various points when in the field and since, and especially to Lieutenant Valois, who 

 performed the not wholly pleasant duties of quartermaster of the expedition, with the 

 labor incident thereto, in addition to escorting an officer whom he " ranked"; to Major 

 Shorkley, commanding officer ; and Captain Bean, quartermaster at Fort Garland, the 

 base of supplies ; and to Dr. P. G. Skillern, of the University of Pennsylvania, whose 

 medical attendance on the expedition for over three months was without cost to the 

 government. 



I am, sir, very respectfully, your obedient servant, 



C. A. H. McCauley, 

 Second Lieutenant Third Artillery, Acting Engineer Officer, 



In charge San Juan Reconnaissance. 

 Lieut. E. H. Ruffner, 



United States Engineers, Chief Engineer Department of the Missouri, 



Fort Leavenworth, Kans. 



