Gray, Thos M. (ca. 1834 - ?). Original Autograph Manuscript Letter Signed by Thos M. Gray, a Young Farmer and One of the Earliest Residents of Walla Walla, Suggesting to “Dear Cousin” the Best Places to Buy Livestock and the Fastest Transportation Routes from Missouri to Washington Territory. Walla Walla, Washington Territory: 22 December 1860.