French was highly pleased. His discovery was not only valuable in itself, but he had reached it in the way which most appealed to his vanity—from his own imagination. He had imagined that the fraud might have been worked in this way. He had tested it and found that it had been. Pure brains! Such things were soothing to his self-respect. He stood considering the matter. The evidence was valuable, but it was far from permanent. A hint that suspicion was aroused, and it would be gone. The criminal, if he were still about, would see to it that innocuous copies of the cards were substituted for these dangerous ones. French felt he dare not run such a risk. Nor could he let Gurney suspect his discovery, lest unwittingly the old man might put the criminal on his guard. He therefore went on: “Now all I want is to make a sketch of each of these parts. The duplicator which went out in the crate may have been taken to pieces and I want to be able to recognise them if they’re found. I suppose I could get a sheet or two of paper in the storeman’s desk?” In one corner a small box with glass sides constituted an office for the storeman. French led the way thither. The door was closed but not locked. The desk, which he next tried, was fastened. But above it in a rack he saw what he was looking for, a pile of blank bin-cards. He turned back. “It doesn’t matter about the paper, after all,” he explained. “I see the desk is locked. I can make my sketches in my notebook, though it’s not so convenient. But many a sketch I’ve made in it before.” Chatting pleasantly, he returned to the bins and began slowly to sketch the leg casting. He was purposely extremely slow and detailed in the work, measuring every possible dimension and noting it on his sketch. Gurney, as he had hoped, began to get fidgety. French continued talking and sketching. Suddenly he looked up. “By the way,” he said, as if a new idea had suddenly entered his mind, “there is no earthly need for me to keep you here while I am working. It will take me an hour or two to finish these sketches. If you want to do your rounds and to get your supper, go ahead. I’ll find you in the boiler-house when I have done.” Gurney seemed relieved. He explained that it really was time to make his rounds and that if French didn’t mind he would go and do so. French reassured him heartily, and he slowly disappeared. No sooner had his shuffling footsteps died away than French became an extremely active man. Quickly slipping the four faked cards from their metal holders, he carried them to the office. Then taking four fresh cards from the rack, he began slowly and carefully to copy the others. He was not a skilful forger, but at the end of half an hour’s work he had produced four passable imitations. Two minutes later he breathed more freely. The copies were in the holders and the genuine cards in his pocket. Hurriedly he resumed his sketching.