He stood with his back against the wall of the black chamber.

She can just make out the back wall of the chamber.

And in a moment there was light enough to see the walls of the huge chamber.

He went back to his survey of the chamber walls.

There was another door, identical to the first, set into the far wall of the chamber.

The light reached to the end and splashed against the far wall of the small chamber.

It sprawled over one wall of the chamber into which we had come.

When he next spoke, his voice echoed from the far walls of the chamber.

He launched himself from the chamber wall and out an exit.

He saw there was another passageway set in the far wall of the chamber.