by Frederic L. (Frederic Logan) Paxson
by Theodore Roosevelt
by Emerson Hough
by Frederick Samuel Dellenbaugh
by Theodore Roosevelt
by Emerson Hough
by Frederick Jackson Turner
by Frederick R. (Frederick Ritchie) Bechdolt
by George Bird Grinnell
by Theodore Roosevelt
by Theodore Roosevelt
by Samuel Adams Drake
by George Alfred Williams
by Nathaniel Pitt Langford