Copy letter from Herbert Rix, to William Carruthers, Fellow of the Royal Society 'Dear Sir, Your note to Dr. Foster has been duly received, but I am to tell you that every inch of available space for next Wednesday is already appropriated. Mr Grenfell's exhibit, therefore, had better be postponed until June, when I have no doubt it will be very welcome. I am, yours truly, H Rix Asst. Sec. R.S. Assistant Secretary, Royal Society]'. 28 April 1894