Copy letter from Herbert Rix, to Sir Robert Giffen, Fellow of the Royal Society 'Dear Sir, I understand that you were not able to be present at the Anniversary Dinner. If this is the case, you are entitled to the return of your cheque. I inclose it herewith and beg that you will let me have an acknowledgment of its receipt. I am, yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 6 December 1895