Overton Johnson and William H. Winter, Route across the Rocky Mountains with a Description of Oregon and California (1982)
“ With the exception of a few Cotton wood trees on some of the streams, there is not timber in the valley; but there is an abundance on the neighboring Mountains. Lead has been found on the Umatila; but not, as yet, in any considerable quantitites. This is the country of the Walawala Indians. They own a great many horses; some of them have as many as two thousand—and they are the finest Indian horses we have ever seen. Thirty miles from the Umatilla, we came to Whitman's Mission, situated on the Walawala River, twenty-five miles from its junction with the Columbia. ”
