Copy letter from Robert William Frederick Harrison, to Professor Clement Le Neve Foster, Fellow of the Royal Society In reply to Foster's letter of the 3 [October], an account of the decimal system of classification is to be found in the 'Bulletin de l'Institut Interntional de Bibliographie', 1898, published in Brussels by the Institute. Has a copy of it in his possession which he can lend for a short time. 5 October 1899