As example of this is Jefferson's Secret Message to Congress Regarding the Lewis & Clark Expedition (1803) this primary document enlightens a person on the outturn that Jefferson was attempting to receive from Lewis and Clarks expedition to the western side of America.
However the textbook fails to mission Jefferson’s alternative for the expedition. With in the secondary text Jefferson is said to only want Lewis and Clark to explore and find the most suitable area for trading ports. Although Jefferson did