Copy letter from Herbert Rix, to Messrs Keen & Drake, 41 Bedford Row, W.C. 'Dear Sirs, The Treasurer says that Lindfield may do the skylight work if he will do it for twenty-five pounds (£25). I enclose your specification herewith. The Treasurer asks whether the gas-piping should not be of galvanised iron. Yours truly Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 30 July 1891