1. Map of the Oregon Territory; by the U.S. Ex. Ex., Charles Wilkes, Esqr., Commander, 1841. Maps University Of Michigan Public content 1841. Sherman & Smith, Wilkes, Charles, 1798-1877, and Young, J. H. (James Hamilton). Relief shown by hachures. Inset: Columbia River, reduced from a survey / made by the U.S. Ex. Ex., 1841. -- Scale ca. 1:700,000. J.H Young & Sherma...