John L. Allen is a former chairman of the Department of Geography and emeritus professor of geography at the University of Wyoming in Laramie. His publications, numbering more than thirty titles to date, reflect his broadly varied interests, including the exploration of the American West, human impacts on natural environments and related landscape changes, and images of the West. Among students of the Lewis and Clark expedition, Professor Allen’s best-known work is Lewis and Clark and the Image of the American Northwest (reprint, New York: Dover, 1975). Originally published under the title Passage through the Garden: Lewis and Clark and the Image of the American Northwest, it remains among the most authoritative and frequently-referenced works in the literature.-Discover Lewis&Clark