Copy letter from Herbert Rix, to Professor Michael Foster, Secretary, Royal Society 'Dear Sir, Please address this to Prof. Huxley [Professor Thomas Henry Huxley] so that it may reach him at the earliest possible date. We do not here know any address but that at Sth [South] Kensington, where it may be delayed. Yours obediently, H Rix Asst. Sec. RS [Assistant Secretary, Royal Society]'. 2 April 1891