Letter to Harvey Cushing, October 1, 1915
Letter to Harvey Cushing, January 7, 1916
Letter to Harvey Cushing, January 29, 1916
Letter to Harvey Cushing
Letter to Harvey Cushing, April 17, 1920
Letter to Harvey Cushing, August 6, 1920
Letter to Harvey Cushing, November 19, 1916
Letter to Harvey Cushing, May 28, 1917
Letter to Harvey Cushing, September 13, 1917
Letter to Harvey Cushing, April 8, 1920