John Charles Frémont,
The Exploring Expedition to the Rocky Mountains…
“ Except that there is a greater quantity of wood used in its construction, Fort Hall very much resembles the other trading posts which have already been described to you, and would be another excellent post of relief for the emigration. It is in the low rich bottom of a valley, apparently 20 miles long, formed by the confluence of Portneuf river with Lewis's fork of the Columbia, which it enters about nine miles below the fort, and narrowing gradually to the mouth of the Pannack river, where it has a breadth of only two or three miles. ”
