Letter to J.A. (?) Henderson, July 3, 1918
Letter to D'Arcy Power, April 1, 1919
Letter to Harvey Cushing, July 1, 1919
Cushing's notes, 1905
Letter to Warden, October 2, 1919
Letter to John George Adami, January 3, 1914
Cushing's notes, 1909
Letter to Richard Pearson Strong, January 1, 1919
Letter to George Sarton, (5,? 1917?)
Extract from Archibald Malloch's journal, July 4, 1915