Copy letter from [Michael] Foster, Secretary of the Royal Society; to the President and Secretary of the Royal Academy, Amsterdam [The Netherlands] In relation to the request to have the Christian Huygens letters sent either to the Royal Academy of Amsterdam, or to the Huygens Committee to make copies of them. Replies that the statutes of the Royal Society bar the letters from leaving their custody, but will ensure the Committee can have copies. 19 January 1885