Letter to Harvey Cushing from Thomas McCrae, 1929, Spruce Street, Philadelphia, Pennsylvania, USA. Precision brought by McCrae on the their book Modern Medicine (in USA) and A System of Medicine (in the English Edition). In the first edition, only Osler's name appeared while in the second edition both names appeared (Osler and McCrae). McCrae listed the articles produced by Osler in each volume.

Letter to Harvey Cushing from Francis R. Packard, 302, South 19th Street, Philadelphia, Pennsylvania, USA. Packard thanks Cushing for returning his letters from Osler and hopes that they were of some use. Osler's Foster review was published in the American Journal of Medical Sciences 1902, but Packard is not sure of the exact issue. He regrets that he does not have any of Osler's letters to his brother, Fred Packard.

Letter to Harvey Cushing from F.X. Dercum, 1719, Walnut Street, Philadelphia, Pennsylvania, USA. The founders of the American Anthropometric Society were Dr. Harrison Allen, Dr. Joseph Leidy, Dr. William Pepper, Dr. Edward Spitzka and Dr. Dercum. The first meeting was held in 1899 and Osler was a member. The brains collected by the Society were kept in the Wistar Institute and studied by Dr. Spitzka. His findings were published in the Transactions of the American Philosophical Society, N.S., Volume XXI, Part III. [See CUS417/78.21] Incl. ms. notes.

Letter to Harvey Cushing from Henry H. Donaldson, Wistar Institute of Anatomy and Biology, Philadelphia, Pennsylvania, USA. Donaldson informs Cushing that the President of the Anthropometric Society is F.X. Dercum. The chief object of the society was the preservation of the brains of its members; Osler's name did not appear among the list of members. However, Donaldson does recall seeing Osler at a meeting of the Society at the Art Club in Philadelphia in 1890. Donaldson will send a copy of Osler's "Leaven of Science," which he delivered at the opening of the Wistar Institute.

Letter to Harvey Cushing from Henry H. Donaldson, Wistar Institute of Anatomy and Biology, Philadelphia, Pennsylvania, USA. Donaldson responds to Cushing's request for information regarding Osler's involvement with the Anthropometric Society.

Letter to Harvey Cushing from H.A. Hare, Spruce and 18th Streets, Philadelphia, Pennsylvania, USA. Fragment. The other candidates for the Chair of Clinical Medicine in Philadelphia in 1884, besides Osler, were Louis Starr and Edwin T. Bruen. Hare is certain that Wood was in support of Osler's appointment in Philadelphia. He believes that Osler and Minis Hays became acquainted after the formation of the Association of American Physicians.

Letter to Harvey Cushing from Thomas McCrae, 1627, Spruce Street, Philadelphia, Pennsylvania, USA. McCrae corrects Cushing's information regarding Osler's Ingersoll Lecture on Science and Immortality in 1904.

Letter to Harvey Cushing from Thomas McCrae, 1627, Spruce Street, Philadelphia, Pennsylvania, USA. McCrae has gathered a number of letters from Osler, which he now sends to Cushing.