Primary Source:
Books
“Thomas
Jefferson: 1803.” The Annals
of America: Domestic Expansion and Foreign Entanglements.
Vol. 4. Chicago:
Encyclopedia Britannica Inc., 1976.
The encyclopedia entry contained commands and notations about the expedition written by President Thomas Jefferson to Captain Meriwether Lewis. This primary source allowed us in understanding the U.S. government in 1800s and the whole purpose to this expedition, which had completely changed the history of the world. This citation from Jefferson’s letter gave exact orders to what the Corps of Discovery should do, which also expressed to us the precision at which the members should work.
Internet
Lewis
and Clark Expedition. 2 February 2001. <www.lewis-clark.org>