Letter from [Alan Archibald Campbell] Swinton, to Sir Alfred Ewing, K. C. B., F. R. S., 16 Murray Place, Edinburgh Referring to the conversation they had regarding Ewing's successor, mentions he has written to Lord Blackburn and recommended Professor D'Arcy Thompson, enclosing a copy [enclosure not present], but has since thought of another suitable candidate: Professor Cunningham McLennan, FRS, Professor of Physics at Toronto. 16 April 1929