Thoreau writes in his journal:
Beck Stow’s Swamp! What an incredible spot to think of in town or city! When life looks sandy and barren, is reduced to its lowest terms, we have no appetite, and it has no flavor, then let me visit such a swamp as this, deep and impenetrable, where the earth quakes for a rod around you at every step, with its open water where the swallows skim and twitter, its meadow and cotton-grass . . .