The collection consists primarily of correspondence on natural history topics between scientists and natural historians. Letters are sometimes accompanied by journal articles.
Figures with significant correspondence within the collection include: Casey Albert Wood, Henry Mousley, Robert Ridgway, and Bowdler Sharpe.
Letter to Harvey Cushing from Edwin Litchfield Turnbull, 1533, Bolton Street, Baltimore, Maryland, USA. Turnbull writes that "Life of Sir William Osler" is one of the greatest biographies of all time.
Letter to Harvey Cushing from J. Frank Ortschild. Ortschild reports on his medical condition. He has received a great deal of pleasure reading Cushing's "Life of Sir William Osler." He writes of the Johns Hopkins and of the Allied debt proposition.
Letter to Harvey Cushing from William Lyon Phelps, Seven Gables, Grindstone City, Michigan, USA. Phelps draws Cushing's attention to Mencken's review of "Life of Sir William Osler," in The American Mercury.
Letter to Harvey Cushing from Susan Delano(?) McKelvey, 160, Riverway, Boston, Massachusetts, USA. McKelvey(?) compliments Cushing on his book, "Life of Sir William Osler."
Letter to Harvey Cushing from Huntington Williams, District State Health Officer, State of New York Department of Health, Albany, New York, USA. Williams compliments Cushing on "Life of Sir William Osler," and wonders when Bibliotheca Osleriana will be ready for distribution. He is curious as to whether Osler ever had a bookplate made as suggested on p. 456 of volume II of the biography.
Letter to Harvey Cushing from R.W. Chapman, Oxford University Press, Amen House, Warwick Square, London, England. Chapman congratulated Cushing on the great and well-deserved success of "Life of Sir William Osler." The Press will begin a third impression of the book. He does not advise a one volume edition in India paper. He warns Cushing not to scold Clulow for t
Letter to Harvey Cushing from Edward P. Carter, Williams Inn, Williamstown, Massachusetts, USA. Carter responds to Cushing request regarding information about Robert Emmons, a friend of Revere Osler's and now a Rhodes Scholar. Emmons wrote a review of Cushing's "Life of Sir William Osler."
Letter to Harvey Cushing from Walter O. Burket, University Club of Evanston, 708 Church Street, Evanston, Illinois, USA. Burket compliments Cushing on his book, "Life of Sir William Osler."