Letter from F C [Frank Campbell] MacIntosh, Department of Physiology, McGill University, to Dr L G [Leonard George] Goodwin, Shepperlands Farm, Park Lane, Finchhampstead, Wokingham, Berkshire, England Thanking Goodwin for his letter with the expected confirmation that Hugh Blaschko had quoted Goodwin correctly. He encloses chapter notes in which he has been 'rather garrulous', rearranging some of Goodwin's sentences, whcih he hopes will be acceptable. He describes 1939 as a watershed year, giving a chronology of discovery, thinking that the Gaddum-Goodwin story would have encouraged von Euler to pursue isdeas if he had known of it. He will leave it to others to write about the mutual influence of Gaddum and von Euler, which belongs to a later period than that which he is focussed upon. He would like Goodwin's photograph of Gaddum to be looked at with a view to making a publishing choice. 14 April 1986