THREE:"Quite," murmured the Doctor. He was leaning forward now, with his elbows resting on the table and his head on one side. "I can see that. There are certain things about you that strike one as being obvious. But what beats me at present is howand where" he looked, figuratively speaking, at the inside of the Clockwork man, "I mean, in what part of your anatomy theermotive force is situated."The Clockwork man suddenly turned round. Immediately afterwards the Doctor became aware of a series of loud popping noises, accompanied by the sound of tearing and rending. Simultaneously, some hard object hit him just over the eye, and the walls and ceiling of the little room were struck sharply by something violently expelled. And then he felt himself being pushed gently away by some pressure that was steadily insisting upon more space.