Copy letter from Robert William Frederick Harrison, to Monsieur Professor Jean Gaston Darboux, [Foreign Member, Royal Society], Doyen de la Faculté des Sciences, 36 Rye Gay-Lussac, Paris 'I have to thank you for your letter and for the corrected proof of the report of your remarks at the recent Conference here. I will, if time allows, with pleasure send you a revised proof. I remain, Very faithfully yours, Robt Harrison Asst. Sec. R. S. [Assistant Secretary, Royal Society]'. 14 October 1896