Copy letter from Herbert Rix, to Dr William Huggins, Fellow of the Royal Society 'The corrected text had better come to me. H.R. [Herbert Rix] Dear Sir, We can rec-commence work today. Please send the diagrams direct to Mr Collings, 172 Strand, W.C., with any necessary instructions. I have not mentioned the matter at all to Lord Rayleigh. I am, yours faithfully, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 24 April 1889