8 KXPLOIUNG EXPEDITION FROM SANTA Ffi 



original monument above alluded to is of earth and sods. This duty \vas finished about 

 tlio middle; of November, lsf>!>, when the thermometer was ranging from zero to about 

 li; above. 



I \vas accompanied to this position bv a small detachment of troops under the 



command of Lieut, H. M. Knos, of the regiment of mounted riflemen, to whose vigi- 



lance i am indebted for a sate transit to Fort Leavenwortli, at a time when the Indians 



of the reat, plains had manifested the most decided determination to be troublesome. 



I remain, very respectfully, your most obedient servant, 



J. N. MACOMB, 

 ( 'a/if ah/, Topographical 

 Capt. A. A. HUMPHREYS, 



Toj>. Kiii/nim-s, in charge of Office of Explorations <nul 



\VASIII\CTO\, 1). C., November 27, 



COLOXI-.N: At the time of making my last annual report 1 was engaged in the 

 preparation of a map of the region visited by the party which I conducted in the summer 

 of IS")!). The map was finished, and is now in the hands of an engraver, who prom- 

 ises to give me the finished plate by the month of March next. 



The report upon the geology, &c., of the same region has been written by Dr. 

 Newberry, and I hoped to have had it in my possession to send in for publication with 

 the animal report from the Bureau of Topographical Engineers, but, owing to the delay 

 in finishing some of the drawings for illustrating the report, and to the fact that the 

 geologist has for some months been actively employed with the duties of the "sanitary 

 commission" in the West, I am not yet in the receipt of his results. I may add for 

 myself that, as in the case of every available officer of the Government, my time has 

 been so much engrossed by the duties which have pressed upon me, arising out of the 

 existing state of affairs in our country, that I have been prevented from pushing the 

 reports and maps, &c., of the San Juan exploration to a conclusion. I hope, however, 

 that they will all be rendered to me before the close of the session of Congress now 

 about to commence. 



All of which is respectfully submitted by your obedient servant, 



J. N. .M.\ COMB, 

 Lieut. Col., Atd-dc-camjt i/> M<tj. (len. McClclluii, it ml Major TojH En<i'niccrn. 



Lieut. Col. H. BACHK, 



Commanding Corps Topographical Engineers, U. S. A. 



