Lewis, Samuel, 1753 or 1754-1822Lewis and Clark Expedition (1804-1806)--Maps.JPEG850279dc-1ffd-45c0-81b0-fa515a0228beeng[Bradford and Inskeep], Iowa City, State Historical Society of IowaPublicA map of Lewis and Clark's track, across the western portion of North America from the Mississippi to the Pacific Ocean; by order of the executive of the United States in 1804, 5 & 6.MapsUnited States of America1964Pennsylvania State University