Copy letter from Robert William Frederick Harrison to Albert Hirth, Fortuna-Werke, Cannstatt, Germany 'Dear Sir, Referring to your enquiry the "Philosophical Transactions" [of the Royal Society] Vol. 205 Series A was published at £1. 8. 0. and can be had of Messrs Harrison & Sons, 45 St. Martin's Lane, London, W.C.' 17 February 1908