654 EEPORT UNITED STATES GEOLOGICAL SURVEY. 



Having finished tlie work, we soon slid down the mountain to camp, 

 and packing np in haste we started for our main camj) ; the trail being 

 broken, we made good time, reaching camp in time for a splendid supper 

 of lake trout and roast venison. 



My next point being the highest peak in the Gros ventre Eange, we 

 continued our course along the foot of the range, keeping close under 

 the mountains to avoid the large streams, as the snow was melting pretty 

 fast and swelling the streams until even the smaller branches were 

 becoming difficult to cross. 



The third day's march brought us to' the foot of Grosventre Peak quite 

 early in the day, and, being able to camp very near the point, I ascended 

 the peak and had a fine afternoon for work. The weather was both calm 

 and clear. This we considered a great treat, as we had not been so fortu- 

 nate on any of our higher points before. The weather up to this time 

 had been very cold and windy nearly all of the time. 



It was my intention to have continued toward the northwest, and to 

 make a station on the Grand Teton ; but I found that it would be 

 almost if not quite impossible to cross even the larger branches of the 

 Snake Eiver, to say nothing of the main stream, which is generallj^ hard 

 to ford even when the water is low. I determined, therefore, to turn 

 toward the southwest and in that way avoid the large streams until 

 later in the season. 



Crossing the basin of Hoback's Eiver, we made a station on a peak of 

 the same name near the northern end of the Wyoming Kange ; thence 

 keeping along the eastern part of the range toward the south. I as- 

 cended Wyoming Peak, a fine conical-shaped mountain near the soutli 

 end of the range and the highest point. Continuing southward, we 

 struck the old Lander road, which we followed toward Fort Hall. Mak- 

 ing a station on Caribou Mountain on the way, we arrived at Hall on 

 the 20th of July. Learning here that it would be imj^ossible to cross the 

 Snake Eiver and reach the Teton Eange without going far out of our 

 way, I thought best to abandon my idea of reaching that portion of 

 the country until another season, when it could be reached without the 

 loss of so much time. After replenishing our supplies here, we turned 

 our steins southward. Making a station on Mount Putnam, we continued, 

 by way of Soda Springs, to a place called Georgeto-uoi, in Bear Eiver 

 Valley, lying between Mount Preuss and Soda Peak. Here I selected 

 a smooth grassy valley in which to measure a second base, or base of 

 verification. After selecting the place, I staked out the line and had 

 all the sage brush, tall weeds, and grass removed, so there should be no 

 obstructions in the way. The measurement was conducted in the same 

 manner as the firsc base. The line was about two miles long, and was 

 measured three times as before; the difference between these three 

 measurements was one and two-tenths inches ; the mean of the meas- 

 urements was taken as correct after reducing for slope, temperature, and 

 stretch of tape, and the final result reduced to sea-level. Expanding as 

 before by means of signals placed on some adjoining hills, the distaiice 

 between Mount Preuss and Soda Peak was determined, thus obtaining 

 a line about fifteen and a half miles long. The mean error of closure in 

 the triangles used in the expansion was ten seconds. The two points 

 thus connected were points that had already been used or selected as 

 stations during the progress of the former work. This work had occu- 

 l>ied us some seven or eight days ; after its completion we moved on 

 southward, making stations on Paris and ISforth Logan Peaks. Eeturn- 

 ing from the latter i)oint to Bear Lake, we followed up the river to Evans- 

 ton, where I connected the triangulation with a latitude station made 



