Copy letter from Herbert Rix, to A Wheeler, Librarian, University College, W.C. 'Dear Sir, We have your letter of thanks for the books presented to University College, but we must ask you to return receipted the full list, which I think you have. The Library Committee requires us to show a receipt in full for all books given away. Yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 20 October 1893