Letter from [Alan Archibald Campbell] Swinton, to Rayleigh [Robert John Strutt] Acknowledges receipt of a previous letter. Believes that the solution to the mystery is that he did not sign the book on the occasion that he was there with Lord Kelvin and [Joseph John] Thomson, as he was present. Emphasises it was not his first time at Terling, recalling the specific circumstances of the occasions. 31 October 1928