Letter to William George MacCallum, January 5, 1913
Cushing's notes, January 3, 1914
Cushing's notes, 1905
Letter to Harvey Cushing, February 27, 1899
Letter to Harvey Cushing, February 27, 1899
Letter to Robert Tait McKenzie, January 3, 1919
Letter to Susan Revere Chapin, July 18, 1916
Extract from Archibald Malloch's journal, July 21. 1917
Clipping, April 4, 1919
Cushing's notes, January 1916
Letter to Edward F. Milburn, January 4, 1909