Copy letter from Herbert Rix, to R T Glazebrook, Fellow of the Royal Society 'Dear Mr Glazebrook, You are quite at liberty to quote from the Newton pamphlet. As to portraits, you will find in "Proceedings" of the Royal Society ['Proceedings of the Royal Society'], vol. 50, No. 307, a list of all our portraits, and, among them, nine portraits of Sir Isaac Newton. We have not the book by Samuel Compton "On Portraits of Newton", nor do I know of it. Yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 21 July 1893