Copy letter from Herbert Rix, to Edward Bagnall Poulten, Fellow of the Royal Society 'Dear Mr Poulton Enclosed herewith I return, as you have requested, the MS. [manuscript] paper originally intended as an addendum to Mr Oldfield Thomas's paper on Ornithorhyncus. Yours faithfully Herbert Rix Asst Sec RS [Assistant Secretary, Royal Society]'. 20 November 1889