and a deeper, almost inaudible, rushing, rumbling
sound that seemed to come from far below.

His wish for a weapon came back, stronger than before. The very fact
that he had seen no one set his nerves on edge even more than the sight
of a known enemy would have done.

He was suddenly no longer interested in his surroundings. He felt
trapped in this strange, silent room. He could see a light shining
through a door at the far end of the room--perhaps it was a way out. He
walked toward it, trying to keep his footsteps as silent as possible as
he moved.

The door had a pane of translucent glass in it, and there were more of
the unreadable characters on it. He wished fervently that he could
decipher them; they might tell him where he was.

Carefully, he grasped the handle of the door, twisted it, and pulled.
And, careful as he had been, the door swung inward with surprising
rapidity. It was a great deal thinner and lighter than he had supposed.

He looked down at it, wondering if there were any way the door could be
locked. There was a tiny vertical slit set in a small metal panel in the
door, but it was much too tiny to be a keyhole. Still--

It didn't matter. If necessary, he could smash the glass to get through
the door. He stepped out into what was obviously a hallway beyond the
door.

* * * * *

The hallway stretched away to either side, lined with doors similar to
the one he had just come through. How did a man get out of this place,
anyway? The door behind him was pressing against his hand with a patient
insistence, as though it wanted to close itself. He almost let it close,
but, at the last second, he changed his mind.

_Better the devil we know than the devil we don't_, he thought to
himself.

He went back into the office and looked around for something to prop the
door open. He found a small, beautifully formed porcelain dish on one of
the desks, picked it up, and went back to the door. The dish held the
door open an inch or so. That was good enough. If someone locked the
door, he could still smash in the glass if he wanted to, but the absence
of the dish when he returned would tell him that he was not alone in
this mysterious place.

He started down the hallway to his right, checking the doors as he went.
They were all locked. He knew that he could break into any of them, but
he had a feeling that he would find no exit through any of them. They
all looked as though t