Copy letter from Herbert Rix, to Walter Frank Raphael Weldon, [Fellow of the Royal Society] 'Mr Weldon, Enclosed herewith I send a letter from our electricians respecting your exhibit[?]. The alternative seem to be to have the lamps outside the tank, or to have the tank set up some weeks before. Please say which alternative you choose. Yours truly Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 24 April 1891