Copy letter from Herbert Rix, to William Henry Preece, Fellow of the Royal Society 'Dear Mr Preece, I have already written to all the daily papers to warn the public against the author of "The Human Hair". I am afraid that nothing more than this can be done. I have had several copies of the pamphlet sent to me from various quarters, with expressions of suprise similiar to your own. Yours truly, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 7 July 1891