Oregon Public Broadcasting, Photo Gallery, “Unfinished Journey: The Lewis and Clark Expedition” (all seven images are copyrighted; portrait of Clark, portrait of Lewis, 1803 letter from Thomas Jefferson, Clark’s elk skin bound journal, map of rapids on the Columbia River, maps of the Snake and Clark’s River, and Lewis wearing Shoshone clothing)
http://www.opb.org/programs/lewisandclark/photogallery.html