Copy letter from Herbert Rix, to Edward Matthey, 78 Hatton Garden, E.C. 'The date for reading your paper is not yet fixed, but you can send in your enlarged diagrams whenever you please, and we will see that they are suspended in the meeting-room in good time for the meeting. Yours truly, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 9 March 1892