8 BXPLOB1NG EXPEDITION FROM SANTA FK 



original tnonumenl above alluded to is of earth and sods. This duty was finished about 

 the middle of November. 1859, when the thermometer was ranging from zero to about 

 lii above. 



I was accompanied to this position 1>\ a small detachment of troops under the 

 command of Lieut. II. M. Enos, of the regimenl of mounted riflemen, to whose vigi- 

 lance I am indebted for a safe transit to Fort Leavenworth, at a time when the Indians 

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



I remain, very respectfully, your mosl obedienl servant, 



J. N. Macomb, 

 Captain Topographical Engineers. 

 Capt. A. A. Humphreys, 



Top. Engineers, in charge of Office of Explorations and Surveys. 



Washington, D. C., November 27, 1861. 



Colonel: At the time of making my last annual report I was engaged in the 

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

 of 1859. The map was finished, and is now in the hands of an engraver, who prom- 

 ises to give me the finished plate bv 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 annual reportfrom the Bureau of Topographical Engineers, but, owing to the delay 

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

 ►logist 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 l>y the duties which have pressed upon me, arising oul oi 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. Macomb, 

 Lieut. Col, Aidrde-camp to Maj. Gen. McClellan, and Major Top'lJSngineers. 



Lieut. Col. II. Bache, 



Commanding Cor/* Topographical Engineers, U. S. A. 



