Copy letter from Robert William Frederick Harrison to Sir Arthur Rucker KCB, FRS 'I am directed to ask if you will be so good as to write for the Proceedings [of the Royal Society] an obituary notice of Professor Maskelyne, whose death was reported to the Council at their meeting last week. The Council suggested that you might perhaps collaborate with Professor Miers as regards Professor Maskelyne's work on mineralogy.' 10 July 1911