The journey of Meriwether Lewis and William Clark across the newly acquired Louisiana Territory from 1804 to 1806 was truly extraordinary. To understand the hardships, dangers, and encounters of these explorers and their Corps of Discovery, students of history should go to the primary source: the journals of Lewis and Clark. This unique biography uses carefully chosen selections from these logs intertwined with well-researched text to explain more about the adventure. Maps, sidebars, and fact boxes support the information about this chapter in early American history.