Copy letter from Herbert Rix, to [John William Strutt] Lord Rayleigh, Secretary, Royal Society 'My Lord, We are sending you the remainder of Thelfall & Adair's [Richard Threlfall and John Frederick Adair] paper, together with the diagrams. I leave for my holiday on Aug [August] 1st. I may, perhaps, be away on July 27th also (for the day). I am ready to give an account of the publication work at any time. Yours obediently, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 19 July 1889