Copy letter from Herbert Rix, to Professor Charles Smart Roy, Fellow of the Royal Society 'Dear Sir, I am instructed by Dr Michael Foster to send you the accompanying paper by Dr Lim Boom Keng, and to ask you to obtain an abstract of it. Dr Foster says, while it is in your hands will you kindly revise it. Some revision you will find is necessary. Yours truly Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 26 October 1893