Copy letter from Robert William Frederick Harrison, to Professor Alfred George Greenhill, Fellow of the Royal Society, Artillary College, Red Barracks, Woolwich 'Dear Sir, Referring to your letter of yesterday's date, I am sorry that the mistake you mention should have crept into the "Proceedings [of the Royal Society]", but it is too late now to correct it. The responsibility for it rests entirely with the author of the obituary notice. I am, faithfully yours, Robt Harrison Asst. Sec. RS. [Assistant Secretary, Royal Society]'. 13 May 1896