Note 324 — Chapter VI · —Geographical Area

The spirit of our western frontier, so long as there was a frontier, was the spirit of movement, of the conquest of space. It found its expression in the history of the Wilderness Road and the Oregon Trail. When the center of population in the United States still lingered on the shore of Chesapeake Bay, and the frontier of continuous settlement had not advanced beyond the present western boundary of Virginia and Pennsylvania, the spacious mind of Thomas Jefferson foresaw the Mississippi Valley as the inevitable and necessary possession of the American people, and looked upon the trade of the far-off Columbia River as a natural feeder of the Mississippi commerce.324