re appeared an opening in the right wall at a distance
of a hundred feet or so. Not having seen or heard anything to
recommend caution, we advanced without slackening our pace until we had
reached it.

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.

Altogether, not a very pleasant sight; and we bundled her into a corner
and proceeded to look round the room, being careful to remain out of
the range of view from the corridor as far as possible.

The room was not luxuriously furnished. The