Letter to Simon Flexner, July 7, 1915
Letter to Edward F. Milburn, January 5, 1914
Letter to Harvey Cushing, June 1903
Letter to Harvey Cushing, June 1903
Letter to Edward Clark Streeter, January, 1917
Letter to John Ballinger, July 22, 1917
Letter to Richard Pearson Strong, January 3, 1919
Letter to John Guppy, April 5, 1919
Letter to Fielding Hudson Garrison, July 2, 1919
Letter to John Young Walker MacAlister, October 3, 1919
Letter to Leonard L. Mackall, January 6, 1914