April 3, 1803 | Letter Meriwether Lewis to Thomas Jefferson, April 3, 1803 Meriwether Lewis writes to Jefferson regarding his preparations, including his many communications with men of science. Lewis includes his plans for a collapsible boat.
October 3, 1803 | Letter Meriwether Lewis to Thomas Jefferson, October 3, 1803 While pausing to provision his expedition, Meriwether Lewis writes to Thomas Jefferson about the scientific explorations at Big Bone Lick and his plans for the trip westward.