Letter to Harvey Cushing, July 14, 1921
Letter to Harvey Cushing, November 24, 1924
Letter to Harvey Cushing, January 7, 1921
Letter to Harvey Cushing, July 1, 1921
Letter to Harvey Cushing, July 12, 1921
Letter to Harvey Cushing, April 14, 1919
Letter to Harvey Cushing, April 27, 1919
Letter to Harvey Cushing, June 4, 1919
Letter to Harvey Cushing, December 10, 1919
Letter to Harvey Cushing, March 28, 1917