Copy letter from Herbert Rix, to Professor Joseph John Thomson, Fellow of the Royal Society 'Soirée Dear Sir, Can you now let us know what your requirements will be in regard to your exhibit on June 17th. The space which would appear suitable is being rapidly filled up, and we must hear soon. There is also the question of the electrical adjustments, as to which we must consult our electricians in good time. Yrs [Yours] faithfully, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 4 June 1891