Book excerpt: Based on papers delivered at the Bicentennial Conference for Lewis & Clark, held in Philadelphia in Aug. 2003, these essays grapple in different ways with the motives underlying the Corps of Discovery & the impact on American culture. The question of failure is used by the authors as a means of interrogating the intellectual & cultural context in which the expedition was framed & in which its results were distributed. Contributors include Robert S. Cox (also the Ed. of the vol.), Domenic Vitiello, S.D. Kimmel, John W. Jengo, Brett Mizelle, & Andrew J. Lewis. Illus.