A MAP OF NORTH AMERICA, CONSTRUCTED ACCORDING TO THE LATEST INFORMATION:

Thomas Jefferson and James Madison, among others, believed that the success of the new nation was tied to the exploration and cultivation of the frontier. Following the Purchase of Louisiana in 1803, Jefferson commissioned Meriwether Lewis and William Clark to map the newly acquired territory and to find a route across the continent. Their expedition opened the door for new explorations and helped to establish a United States presence in the West. Henry Tanner incorporated information from discoveries made by Lewis and Clark (1804-06), Zebulon Pike (1806) and Stephen H. Long (1819-20) to create the most significant map of the American West produced during the first decades of the nineteenth century.

Americans began to regard natural wonders as symbols of their national pride. The cartouche on Tanner's maps combined images of Niagara Falls and Natural Bridge along with other symbolic forms of American fauna such as a rattlesnake, a beaver, and an eagle.
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