814 Scientific Intelligence. 
surveyed a route from Ogden to Fort Hall, Idaho, where full 
preparations were made for a pack train with supplies for a given 
time. Snake Riv 
valley, forced their way across the mountains, made a careful sur- 
vey of the Teton range, then passed up the valley of Henry’s 
reached the Geyser Basin of the Madison August 14th. 
The pa 
t disco’ 
made by this party was the four remarkable passes at the head of 
ese passes correspond to the four points of th 
compass, and are all within a few miles of each other. Henry 
Lake is located in the center. The Targee or East pass is about 
6,500 feet elevation, and forms one of the at gateways to 
Madison valley, and the sources of the Madison and Yellowston® 
Henry’s or South pass is about 6,000 feet, and opens into)” 
Snake valley; Red Rock or West pass, 6,300 feet, connects the 
great valley of the Jefferson branch, while the Madison or South 
pass opens into the lower Madison. All these passes are 
smooth and low that one may ride over them in a carriage are 
spe There is probably not a more interesting geograph 
point on the American continent where there are, within a0 area 
