Carbon copy of a typescript letter with autograph notes made in C. H. Best's hand on the top and in the right margin. The letter is marked Confidential. Macleod writes in response to a statement made by Bayliss, published in the The Times of London and then reprinted in a Toronto newspaper. The statement credited Macleod, not Banting, for the discovery of insulin. The publication of Bayliss' statement so upset Banting that Macleod subsequently sent a statement to the Toronto newspapers and wrote to Bayliss.