Formerly, when lying awake at midnight in those woods, I had listened to hear some words or syllables of their language, but it chanced that I listened in vain until I heard the cry of the loon. I have heard it occasionally on the ponds of my native town, but there its wildness is not enhanced by the surrounding scenery.
Henry David Thoreau (1817–1862), U.S. philosopher, author, naturalist. "The Allegash and East Branch" (1864) in The Maine Woods (1864), in The Writings of Henry David Thoreau, vol. 3, p. 248, Houghton Mifflin (1906).