Copy letter from Robert William Frederick Harrison, to Professor Dr Christian Felix Klein, Foreign Member of the Royal Society, Weender Chaussee, 6, Gottingen, Germany 'Dear Sir, I am sending you to-day by book-post, by desire of Dr H E [Henry Edward] Armstrong, a set of the draft Index Schemes drawn up in connection with the proposed International Catalogue of Science, a Conference on which is to be held here on July 14th next. I am, faithfully yours, Robt Harrison Asst. Sec. RS. [Assistant Secretary, Royal Society]'. 16 May 1896