Classicly

Time proved the wisdom of President Jefferson’s preparations made even before the territory had been bought. Just at the right moment the trail across the continent was opened. Louisiana Territory was valued at its future worth; the people were informed of its merits and possibilities; after the return of the explorers, the American citizens pressed forward, to see for themselves. And in due course the flag floated unchallenged in that Oregon where, also, the Lewis and Clark men had blazed the way.