6G0 EEPOET UNITED STATES GEOLOGICAL SURVEY. 



nearly the whole surface of the Park. All could see the great rows of 

 snow-clad mountains which surround the Park nearly on all sides. 



Leaving Heart Lake on the morning of September 7, we pushed our 

 way through to Bottler's ranch, on the Yellowstone, in four days. Mr. 

 Eccles had left his small outfit of mules here for me. Obtaining, besides 

 these, two or three mules from Messrs. Jackson and Gannett, I was able 

 once more to resume my work; but much valuable time had been lost, as 

 the snow would soon close down on us. 



Eeturning to the Mammoth Hot Springs, I found General Miles and 

 party. He had encountered my friends of August 25, killed eleven and 

 captured some thirty -five, besides a large herd of horses and mules, 

 losing two men in the fight. After occupying Electric Peak, I moved 

 southward, making a station on Mount Washburn with much difficulty, 

 owing to a heavy snow-storm which caught us near this point. The 

 whole Park was now covered with from six inches to a foot of snow 

 (September 24), while on the mountains it was much deeper. After the 

 storm, we continued southward up the Yellowstone. Passing the lake 

 on tbe eastern side, we continued up the Upper Yellowstone nearly to 

 its head, hoping to make a station on Yount's Peak, situated at the head 

 of the river. But here we were caught in another heavy snow-storm, 

 which blocked us completely from any further work in that portion of 

 the country. Finding myself thus blocked, I determined to get out be- 

 fore it would be too late to cross the range. 



Marching by way of Two Ocean Pass thence southward by way of 

 To-gwo-tee Pass, we came out in the valley of Wind River after five 

 days of hard struggle through the snow, timber, and rocks; following 

 this valley to Camp Brown, thence by forced marches to Rawlins on the 

 Union Pacific, but not without another storm, which caught us the last 

 day, while marching across the open country between Whisky Gap and 

 Rawlins. This was one of the worst snow-storms I ever encountered; 

 the wind was blowing so hard that one could not see hardly twenty paces 

 ahead, and the cold was intense. We finally reached the station just 

 before dark, nearly frozen and well-nigh exhausted. 



I was in hopes of visiting Fort Steele and making another connection 

 with the astronomical station made there by Lieutenant Wheeler's sur- 

 vey ; but the storm had been so severe and the weather continued cold 

 and windy, I determined to close up for the season. Loading every- 

 thing on the cars, we arrived in Cheyenne on the 17th of October, and 

 soon after were on our way to Washington. 



The accompanying map shows the positions of all the stations that 

 were occupied, also some of the more j)rominent points that were located 

 by foresights, while the accompanying tables give the latitudes, longi- 

 tudes, and elevations so far as known, also azimuths and distances 

 between the different peaks. Monuments were budt on all of the occu- 

 pied points. 



The area covered by the triangulation of the two seasons was about 

 39,000 square miles ; within this area there were forty-five points well 

 located, besides some secondary points that are not given here, but 

 have been used in the construction of the maps. 



Azimuths were taken at various points and carried through from one 

 point to the other, thus checking each other. The method of adjust- 

 ment was essentially the same as used in the Colorado work, given in 

 the report of 1876. 



When the two bases were connected through the triangulation, there 

 was found to be a difference of nearly one foot per mile. This difference 

 is undoubtedly due to the connection across the Green River basin, 

 where, owing to the lack of points, I found it very difficult to obtain 



