Copy letter from Herbert Rix, to Professor Osborne Reynolds, Fellow of the Royal Society 'Dear Sir, I am surprised to find that you have not yet received the photograph of Joule's MS [manuscript]. The photographer was ordered to send it direct. I shall write to him and ask him to hurry the printing. The photograph was taken a fortnight ago, or more. I am, yours truly, Herbert Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 27 January 1892