Letter to Dr. Cushing, February 9, 1899
Letter to Harvey Cushing, February 27, 1899
Letter to Harvey Cushing, February 27, 1899
Letter to Harvey Cushing, May 17,1905
Letter to Harvey Cushing, May 19, 1920
Letter to Harvey Cushing, May 6, 1920
Letter to Harvey Cushing, April 12, 1920
Letter to Harvey Cushing, June 3, 1920
Letter to Harvey Cushing, December 5, 1921
Letter to Harvey Cushing, November 29, 1921
Letter to Harvey Cushing, July 29, 1922