Copy letter from [William Bate] Hardy, Secretary of the Royal Society and FRS; to Major W.B. Cannon, Central Laboratory, A.P.O. 721, A.E.F., France 'Dear Cannon, Either June 13 or June 20 will do; and as they appear to be equal to you I will fix on June 20, so that notice can go out in plenty of time - the title of the Lecture being "The Physiological Basis of Thirst" 14 May 1918