Green River, from thence across sandy deserts to near the sources of the Snake or south branch of the Columbia River, on which is a trading post of the Hudson's Bay Company called Fort Hall.
From this point they descended the north bank of the Snake River (which is navigable only for small canoes) through a rugged barren country to the Walla Walla River—or by the newly discovered route they leave the Snake River about 100 miles from its junction with the Columbia, and following a southwest course, by the valleys of several unimportant streams, they fall upon the Columbia at the "Dalles." The principal obstructions on this line of communication with the Oregon Territory appear to arise on the west side of the Rocky Mountains. On the east side the country is comparatively level and fertile, abounding in buffaloe, etc.
The passage of the Rocky Mountains presents little or no difficulty. The valley being open and comparatively level. Hundreds of wagons have traversed this pass during the last three years.
That troops might be sent from the United States to Oregon is evident from the fact that 300 dragoons of the United States regular army having accompanied the last emigration to the above mentioned valley through the mountains, ostensibly for the protection of the said emigrants from the hostile bands of Indians infesting the eastern plains.
On the west the country is one continuous sandy desert. Steep ravines and mountain passes constantly intersect the road. In many places the timber is so scarce that sufficient for the ordinary camp purposes is with difficulty obtained, while the sterility of the country not affording food for buffaloe and other wild animals no dependence can be placed on obtaining a fresh supply of provisions by the chase.
The emigrants, on their arrival from the United States, rendezvous at the "Dalles," where an American Methodist Mission is established on a rising ground to the south of the river, about three miles below the rapid.
