Copy letter from Robert William Frederick Harrison, to the Secretary, Marconi's Wireless Telegraph Company Limited, 18 Finch Lane, E.C. 'Dear Sir, The number of Proceedings [of the Royal Society] containing the paper read by Dr Fleming in February 1905 is 505, and ^was^ published at two shillings. Copies may be obtained of Messrs Harrison & Sons, 45 St. Martin's Lane, W.C. I am, faithfully yours, Robt [Robert] Harrison Assistant Secretary R.S. [Royal Society]'. 28 May 1907