Copy letter from Herbert Rix, to R Child Bayley, 50 Great Russell Street, Bloomsbury, W.C. 'Dear Sir, I do not remember anything of colour photographs by Besquerel. We had some of Lippmann's on loan, but they were sent back to him through Captain Abney. I am, yours faithfully, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 22 March 1894