Copy letter from Robert William Frederick Harrison to N J Gamber, 7 Rue Danton, Paris VI 'Dear Sir, Proceedings, Royal Society. Referring to your enquiry, the proceedings that are on sale are shown in the enclosed advertisement. They can be obtained of Messrs Harrison & Sons, 45 St Martin's Lane, London, WC. Should you require any further particulars, kindly communicate with them.' 18 May 1908