I said aloud to Harry, "Probably a cross-passage," and then jerked him back quickly against the opposite wall as I saw the real nature of the opening.
It led to a small room, with a low ceiling and rough walls, dark as the passage in which we stood, for it contained no light.
We could see its interior dimly, but well enough to discover the form of an Inca standing just within the doorway. His back was toward us, and he appeared to be fastening something to the ceiling with strips of hide.
It was evident that we had not been seen, and I started to move on, grasping Harry's arm. It was then that I became aware of the fact that the wall leading away in front of us—that is, the one on the right—was marked as far as the eye could reach with a succession of similar openings.
They were quite close together; from where we stood I could see thirty or forty of them. I guessed that they, too, led to rooms similar to the one in front of us, probably likewise occupied; but it was necessary to go on in spite of the danger, and I pulled again at Harry's arm.
Then, seeing by his face that something had happened, I turned my eyes again on the Inca in the room. He had turned about, squarely facing us. As we stood motionless he took a hasty step forward; we had been discovered.
There was but one thing to do, and we didn't hesitate about doing it. We leaped forward together, crossing the intervening space in a single bound, and bore the Inca to the floor under us.
My fingers were round his throat, Harry sat on him. In a trice we had him securely bound and gagged, using some strips of hide which we found suspended from the ceiling.
"By gad!" exclaimed Harry in a whisper. "Look at him! He's a woman!"
It was quite evident—disgustingly so. Her eyes, dull and sunken, appeared as two large, black holes set back in her skull. Her hair, matted about her forehead and shoulders, was thick and coarse, and blacker than night. Her body was innocent of any attempt at covering.