Mark Twain, James Fenimore Cooper, Jack London, Herman Melville, Zane Grey, John Wesley Powell, Joshua Slocum, Robert Montgomery Bird, Oliver Optic, Mary Mapes Dodge, Ambrose Bierce, Bret Harte, Clarence King, Richard Henry Dana, Henry David Thoreau, Meriwether Lewis, William Clark, Sarah H. Bradford, Theodore Winthrop, T. C. Harbaugh, Dillon Wallace