February 27, 1803 | Letter Thomas Jefferson to Benjamin Smith Barton, February 27, 1803 Thomas Jefferson informs Benjamin Smith Barton of Meriwether Lewis' upcoming journey, excited at the prospect of the scientific advances that will result.
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.