Copy letter from Professor John Gray McKendrick, Fellow of the Royal Society, Eldergrove, Stonehaven, N.B. 'Dear Sir, Inclosed herewith I beg leave to hand you a cheque for £5 ^from Donation Fd [Fund]^ in aid of Dr. W.R. Jack's researches on the "Time relations of fatigue in Muscle". I am, yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 17 July 1894