Author Craig Fehrman has written a new history of the expedition of Lewis and Clark. It's called "This Vast Enterprise." In the prologue to his 515-page book, Fehrman writes: "After departing from near St. Louis on May 14, 1804, the Corps of Discovery traveled 8,000 miles to find 'the most direct and practicable water communication across the continent for the purpose of commerce.'" The Corps was Jefferson's idea. Craig Fairman continues: "When Lewis and Clark returned more than two years later, they did not have a Northwest Passage, but they did have an incredible tale…" This is Mr. Fehrman's third book.

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