Letter to William Sydney Thayer, (January 8, 1907 ?)
Letter to William Sydney Thayer, January 8, 1913
Letter to William Sydney Thayer, January 8, 1914
Letter to William Sydney Thayer, July 7, 1908
Letter to William Sydney Thayer, May 30, 1905
Letter to William Sydney Thayer
Letter to William Sydney Thayer, January 6, 1915
Letter to William Sydney Thayer, July 10, 1915
Letter to William Sydney Thayer, January 28, 1906
Letter to William Sydney Thayer, January 24, 1917