Thoreau
"Walking"
http://www.theatlantic.com/magazine/archive/1862/06/walking/304674/
"The Succession of Forest Trees"
http://thoreau.eserver.org/foresttrees.html
http://www.theatlantic.com/magazine/archive/1862/06/walking/304674/
"The Succession of Forest Trees"
http://thoreau.eserver.org/foresttrees.html