Copy letter from Herbert Rix, to [John William Strutt] Lord Rayleigh, [Royal Society] 'My Lord, Threlfall & Adair [Richard Threlfall and John Frederick Adair]: - of this paper which I believe you took with you after the last Com. [Committee] of Papers we have a part here, 3 pads of MS. [manuscript] & several plates. These were probably left here on purpose, but I thought I would mention it in case it was accidental. Yours obedly [obediently] H Rix'. 17 July 1889