Letter to Harvey Cushing, September 23, 1921
Letter to Harvey Cushing, April 1, 1920
Letter to Harvey Cushing, June 2, 1920
Letter to Harvey Cushing, August 14, 1922
Letter to Harvey Cushing, August 10, 1922
Letter to Harvey Cushing, April 20, 1920
Letter to Harvey Cushing, July 2, 1920
Letter to Harvey Cushing, July 25, 1920
Letter to Harvey Cushing, August 18, 1922
Letter to Harvey Cushing, April 12, 1920