Copy letter from The Robert William Frederick Harrison to Professor C [Charles] S [Scott] Sherrington, Fellow of the Royal Society 'Dear Prof Sherrington, Can you say whether Professor Macallum, upon his retirement from the Chair of Physiology in the University of Toronto, has taken up an appointment in this country. If he has, it would be desirable to insert it and his address in the forthcoming Royal Society Year Book. Perhaps he may be still resident in Toronto.' 26 January 1909