Copy letter from Herbert Rix, to Mr H R Barraud, Messrs Mayall & Company, 73 Piccadilly, W. 'Dear Sir, I have seen the Treasurer about photographing Bacon's picture. He does not wish the glass to be removed, but has no objection to the picture being taken into the courtyard to be photographed in suitable weather. Yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 13 November 1893