Copy letter from Robert William Frederick Harrison to F [Francis] Darwin FRS A letter from Mr Dakin of New York, who was invited to deliver the Croonian Lecture, declining on the grounds of ill-health. The second string was Professor Haberlandt of Graz who was to be asked to deliver a lecture on "The sense organs in plants". Harrison asks Darwin, as one of his proposers, whether he would write to him to ascertain whether he can accept the invitation. 23 March 1910