Copy letter from Herbert Rix, to the Secretary, London Chamber of Commerce, Botolph House, Eastcheap, E.C. 'Sir, The address of Professor Roberts-Austen (private as well as official) is: Royal Mint, Tower Hill, E.C. I am, yours faithfully, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 14 September 1893