128 PRIMARY TRIANGULATION AND PRIMARY TRAVERSE, [bull. 201. 
OBSERVATION, TETON COUNTY. 
About 6 miles northwest of Midvale station on Great Northern 
Railway, 4 miles a little south of west of Lower Two Medicine Lake, 
and G miles east of the Continental Divide. It is best reached by 
taking the trail from the wagon-road bridge over Two Medicine Creek 
near the upper bull corral of the Indian agency. This trail leads to 
the station on a shoulder about 1 mile east of highest point, which is 
an inaccessible crag. 
Station mark: Center of drill hole in a rock set in ground under 
center of cairn 7 feet in height. 
[Latitude 48° 27' 44.00". Longitude 113° 19' 35.15".] 
To station- 
Baptiste - . . 
Stimpson . 
Divide . . 
Durham . . . 
Half Dome 
Elk 
Azimuth. 
31 40 33.62 
106 03 58.03 
166 40 04. 77 
254 16 10.92 
318 54 07.47 
353 31 19.30 
Back azimuth. Log. distance 
211 26 50.30 
285 51 16.29 
346 36 47.00 
74 28 54.88 
139 05 14. 01 
173 32 39.96 
Meters. 
4. 6377352 
4. 3369737 
4. 3693647 
1.3375263 
4. 4467669 
4. 2948174 
ROBERTSON, TETON COUNTY. 
On the eastern end of Robertson Mountain, being the second peak 
on the "comb" counting from the east. Only apparent way of 
reaching it is to climb the rock slide on north side of east end of 
mountain, passing over the "comb" until station is readied. It is a 
difficult and somewhat dangerous climb on account of loose rock. 
Station mark: An aluminum bolt, stamped "U. S. G. S.," set in solid 
ledge, over which is a monument of loose rock 9 feet high. 
[Latitude 48° 53' 06.45". Longitude 113° 33' 40.65".] 
To station— 
Azimuth. 
Back azimuth. 
Log. distance. 
Galbreath 
256 44 18.59 
333 50 55. 74 
76 58 00.69 
153 58 13.26 
Meters. 
4. 3581326 
Divide •__ 
4. 4314489 
ROCKY, TETON COUNTY. 
Highest peak of range to east of the North Fork of Sun River, about 
6 miles west of "Ear" (or "Elephants Ear") Butte, and 4 miles south- 
west of Friar's sawmill, on South Fork of Teton River, about 6 miles 
east of North Fork of Sun River. It is on divide between waters of 
