Letter to Harvey Cushing, (ca November 21, 1916)
Letter to Harvey Cushing, November 19, 1916
Letter to Harvey Cushing, January 29, 1916
Letter to Harvey Cushing, January 7, 1916
Letter to Harvey Cushing, December 7, 1915
Letter to Harvey Cushing, October 1, 1915
Letter to Harvey Cushing, August 30, 1915
Letter to Harvey Cushing, January 6, 1915
Letter to Harvey Cushing, April 28, 1913
Letter to Harvey Cushing, April 16, 1913