And then, as Gregg took a leisurely stride towards the door, as though to investigate matters on his own, the Doctor caught hold of his sleeve. "Don't do that. Listen, first, to what I have to tell you. I rather fancy it will take the edge off your curiosity." Gregg swung round and sat on the couch. He lit a cigarette. He made no effort to conceal his sense of superior self-possession. The doctor took the cigarette that was proffered to him, and leaning forward tried to take a light from his companion. But his hand shook so violently that he could not manage the simple operation. In the end Gregg lit another match and held it with a steady hand. As the Doctor told the story of what had taken place so recently in the little room, Gregg sat nursing an uplifted knee between his hands and with the cigarette drooping idly from his lips. Once or twice he interrupted with a gesture, but if he experienced astonishment he never betrayed the fact. Even the description of the sudden growth of beard did not disturb the look of calm enquiry upon his hard-set features. He seemed to be following something in his mind that elucidated the facts as they came out; and as the narrative drew to a close he nodded his head very slightly, as though having found corroboration for these strange events in some theory of his own, and _vice versa_. When at last the Doctor reached the climax of his tale there was no horror written upon Gregg's countenance. He remained impassive, a sort of buffer against which the Doctor's hysterical phrases recoiled in vain. There was a moment's silence. The Doctor had been talking so rapidly, and he had been so swayed by his feelings, that he had scarcely noticed the other's demeanour. When he looked up Gregg was walking with a measured tread up and down the floor. He had dropped his cigarette, and his mouth was formed in the act of whistling. The Doctor started to his feet. "What! You believe it then? You, who have not seen this mystery--you believe it?" "Why not?" Gregg paused in his walk and looked genuinely surprised. "But--surely!" The Doctor sat down again and groaned. "Surely you cannot accept such a story without a sign of incredulity? What state of mind is that which can believe such things without having seen them? Why, you credulous fool, I might have invented the whole thing!" Gregg smiled. "I am one of those who are prepared to accept the miraculous at secondhand. Besides, you forget that I have already witnessed some of the Clockwork man's manifestations of ingenuity. Nothing that you have told me causes me more astonishment than I experienced on the first occasion we had reason to believe the Clockwork man was--what he is. It is all, to my mind, quite natural and logical."