Letter to William Osler, January 16, 1913
Letter to John Young Walker MacAlister, January 17, 1913
Letter to Charles Ferdinand Martin, January 20, 1913
Letter to Emanuel Libman, January 20, 1913
Letter to John Alexander Nixon, January 27, 1913
Letter to Arnold Carl Klebs, January 31, 1913
Letter to John Alexander Nixon, February 5, 1913
Letter to Werner Von Noorden, February 6, 1913
Letter to Henry Barton Jacobs, February 8, 1913
Letter to Andrew Macphail, February 11, 1913