Letter to Harvey Cushing, December 15, 1921
Letter to Harvey Cushing, August 25, 1920
Letter to Harvey Cushing, August 6, 1920
Letter to Harvey Cushing, June 3, 1920
Letter to Harvey Cushing, April 1, 1920
Letter to Harvey Cushing, April 17, 1920
Letter to Harvey Cushing, 1921
Letter to Harvey Cushing
Letter to Harvey Cushing, August 28, 1921
Letter to Harvey Cushing, March 22, 1921