Copy letter from Robert William Frederick Harrison to the Editor, "Le Radium", 91 Rue Denfert-Rochereau, Paris 'I have instructed our printers to prepare and forward direct to you electros of the blocks illustrating the paper by Mr C T R Wilson mentioned in your letter of January 14th. This is done, of course, subject to the formal consent of Council, which, however, may be anticipated.' 21 January 1913