The question when vol. X of our Catalogue will be issued is one that only you can answer, as it depends entirely upon your rate of printing; indeed, I am shortly to write you an official letter begging you to much increase your speed. Our staff is now quite able to keep up with much better speed than you are using. At present, about 700 out of 1000 pages of the volume are printed.
Asst. Sec. R.S. [Assistant Secretary, Royal Society]'.