Copy letter from Herbert Rix, to Mr R Wilson, Post Office Terrace, Cambridge 'Dear Mr Wilson, Inclosed herewith I send you a letter from Mr Cunningham. You will see that he does not insist upon a revise of all the plates, but, as the alterations are important, I think a revise might be prudent if you have any manner of doubt yourself as to the final result. Please return Mr Cunningham's letter. Yours truly, H Rix Asst. Sec. R.S. [Assistant Secretary, Royal Society]'. 2 October 1893