February 28, 1803 | Letter Thomas Jefferson to Benjamin Rush, February 28, 1803 Thomas Jefferson informs Benjamin Rush of Meriwether Lewis' upcoming trip west, asking Rush to assist Lewis in any way possible. Jefferson then details his ongoing digestive problems.
April 27, 1803 | Letter Thomas Jefferson to Meriwether Lewis, April 27, 1803 Thomas Jefferson informs Meriwether Lewis he will be forwarding copies of his instructions for the journey into the Louisiana Territory. The instructions may be shown to members of the American Philosophical Society, in case they would make any modifications.
June 11, 1803 | Letter Benjamin Rush to Meriwether Lewis, June 11, 1803 Benjamin Rush writes instructions for Meriwether Lewis, who is about to undertake his trip westward.