“We are three quarters of a mile in the depths of the earth, and the great river shrinks into insignificance as it dashes its angry waves against the walls and cliffs that rise to the world above.”— John Wesley Powell
“The walls are resonant with majestic sounds, for the roaring waters of the river are echoed from cliff to cliff.”— John Wesley Powell
“Years ago I was a schoolmaster in the Illinois bottom. The river was to me a landmark, a boundary, a destiny.”— John Wesley Powell