Copy letter from Herbert Rix, to Messrs Dent & Hellyer, 21 Newcastle Street, Strand, W.C. 'Dear Sir, We are not aware that any such account as you mention was ever delivered here. Our accounts are nearly always paid within three months, and always within the year. If you will send us a statement of the items, the matter shall be examined. Yours faithfully, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 10 May 1889