Letter to Henry V. Ogden from William Osler, 13, Norham Gardens, Oxford, Oxfordshire, England. (From the secretary's notebook). Interested in Ogden's experience with encephalitis. Comparison between the outbreak in the USA and the one in England. He had promised an article for the American Journal of Neurology, but has not had time to prepare it. Will have McNalty send him his report on the English experience. Mentions the many cases which have a resemblance to the Heine-Medin.