Letter to Harvey Cushing, April 14, 1921
Letter to Harvey Cushing, April 28, 1920
Letter to Harvey Cushing, August 15, 1921
Letter to Harvey Cushing, February 11, 1921
Letter to Harvey Cushing, July 12, 1921
Letter to Harvey Cushing, July 14, 1921
Letter to Harvey Cushing, May 12, 1920
Letter to Harvey Cushing, May 17, 1920
Letter to Harvey Cushing, May 22, 1920
Letter to Harvey Cushing, May 27, 1920