Copy letter from Herbert Rix, to M E Masoin, Secretaire Perpetuel, Academie Royale de Medecine de Belgique, Palais des Academies, Brussels 'Sir, Your letter of the 20th April with Catalogues of the publications of your Academy has duly arrived, and will be laid in due course before the Officers of the Society. I have the honour to remain, your obedient servant, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 23 April 1894