Copy letter from Herbert Rix, to John Ball, Fellow of the Royal Society 'Dear Sir, You will find that our quotation for vols. [volumes] 1-8 of the Catalogue of Sci. [Scientific] Papers is £3-11-0 (not £3-10-0). We have entered them to you at that price. I am, yours faithfully, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 16 April 1889