Copy letter from Robert William Frederick Harrison, to Mr Chas. J Thynne, 6, Great Queen Street, Lincoln Inn's Fields, W.C. 'Dear Sir, The parts of our Proceedings Nos. 360, 365, 374 and 382 were published at 2/, 1/6, 1/- and 2/- respectively and may he had of Messrs Harrison & Sons, St. Martin's Lane at a discount price. I am, yours faithgully, Robt Harrison Asst. Sec. R.S. [Assistant Secretary of the Royal Society]'. 16 May 1898