Copy letter from Herbert Rix, to George James Symons, Fellow of the Royal Society 'Dear Mr Symons, I wrote to Dr Kiessling asking for a copy of his Untersuchungen on July 26th, and my letter, I venture to think was expressed in polite and judicious terms, but I have had no answer of any sort. Can you suggest any lever by which we can get it out of him? & if not, do you think we had better buy the second hand copy you mention? Yours faithfully Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 18 October 1889