Letter to William Osler from Leonard L. Mackall, 420, Riverside Drive, New York, USA. Acknowledges his letter of August 6th. Asks him if he can get for him a copy of Fergusonn's Bibliotheca Chemica. Asks for reprints of Osler's remarks on Willis. Asks him what he knows about Stirling's Some Apostles of Physiology. It is supposed to contain matter on Servetus. Sends him a copy of his article on the De Renne Library. Details on his peripeitia to find a work during the war. Asks him if he has seen the paper on Conrad Gesner in Papers Am. Bibliogr. , Sec.X, April 1916. Information about the Servetus portrait.

Letter to William Osler from Abraham Jacobi, 19 E., 47th Street, New York, USA. Birthday greetings on his seventieth anniversary. States that Osler is eminently the indispensable man in medicine.

Letter to William Osler from Leonard L. Mackall, 420, Riverside Drive, New York, USA. Sends him three small books : a reprint of Castellio's reply to Beza as to punishing the Heretics, Heredia's translation of the Spanish Nun-soldier's Autobiography, "La Nonne Alferez, Paris, 1894", and an Hist. Taschenbuch containing an article by Tollin of Servetus Fame. Would like to have news from him and from his son. Notes on Thomas Browne, on the Spanish Military Nun and on Servetus.

Letter to William Osler from Starr J. Murphy, 26 Broadway, New York, USA. Acknowledgment on the behalf of Rockefeller his letter of March 26th. The matter will receive their careful consideration.

Letter to William Osler from D. Appleton & Company, 29-35, West 32nd Street, New York, New York, USA. Arrangements for the Spanish Edition of Osler's "Principles and Practice of Medicine."