“I tried to call to them, but the language they had was apparently different from that of the Over-world people; so that I was needs left to my own unaided efforts, and the thought of flight before exploration was even then in my mind. But I said to myself, ‘You are in for it now,’ and, feeling my way along the tunnel, I found the noise of machinery grow louder. Presently the walls fell away from me, and I came to a large open space, and striking another match, saw that I had entered a vast arched cavern, which stretched into utter darkness beyond the range of my light. The view I had of it was as much as one could see in the burning of a match.