"Bah! I didn't think you were so conventional," I said contemptuously. "I suppose you have found out how to make the memory-transferring machine?" "I have," he cried exultantly. "I shall christen it the noemagraph, or thought-writer. The impression is received on a sensitised plate which acts as a medium between the two minds. The brow of the purchaser is pressed against the plate, through which a current of electricity is then passed." He rambled on about volts and dynamic psychometry and other hard words, which, though they break no bones, should be strictly confined in private dictionaries. "I am awfully glad you came in," he said, resuming his mother tongue at last--"because if you won't charge me anything I will try the first experiment on you." I consented reluctantly, and in two minutes he rushed about the room triumphantly shouting, "22, Albert Flats, Victoria Square, Westminster," till he was hoarse. But for his enthusiasm I should have suspected he had crammed up my address on the sly. He started the Clearing House forthwith. It began humbly as an attic in the Strand. The first number of the catalogue was naturally meagre. He was good enough to put me on the free list, and I watched with interest the development of the enterprise. He had canvassed his acquaintances for subscribers, and begged everybody he met to send him particulars of their cast-off memories. When he could afford to advertise a little, his _clientèle_ increased. There is always a public for anything _bizarre_, and a percentage of the population would send thirteen stamps for the Philosopher's Stone, post free. Of course, the rest of the population smiled at him for an ingenious quack. The "Memories on Sale" catalogue grew thicker and thicker. The edition issued to the subscribers contained merely the items, but O'Donovan's copy comprised also the names and addresses of the vendors, and now and again he allowed me to have a peep at it in strict confidence. The inventor himself had not foreseen the extraordinary uses to which his noemagraph would be put, nor the extraordinary developments of his business. Here are some specimens culled at random from No. 13 of the Clearing House catalogue when O'Donovan still limited himself to facilitating the sale of superfluous memories:-- 1. 25, Portsdown Avenue, Maida. Vale. 3. 13502, 17208 (banknote numbers). 12. History of England (a few Saxon kings missing), as successful in a recent examination by the College of Preceptors. Adapted to the requirements of candidates for the Oxford and Cambridge Local and the London Matriculation. 17. Paley's Evidences, together with a job lot of dogmatic theology (second-hand), a valuable collection by a clergyman recently ordained, who has no further use for them. 26. A dozen whist wrinkles, as used by a retiring speculator. Excessively cheap.