“Here is no help,” said Dick. “Let us try back.”

“Nay,” said Joanna; “maybe the passage goeth farther.”

And she pushed on. But a few yards farther the passage ended at the top of a short flight of steps; and it became plain that, as long as the soldiers occupied the hall, escape was impossible upon that side.

They retraced their steps with all imaginable speed, and set forward to explore the other branch. It was exceedingly narrow, scarce wide enough for a large man; and it led them continually up and down by little breakneck stairs, until even Dick had lost all notion of his whereabouts.

At length it grew both narrower and lower; the stairs continued to descend; the walls on either hand became damp and slimy to the touch; and far in front of them they heard the squeaking and scuttling of the rats.

“We must be in the dungeons,” Dick remarked.

“And still there is no outlet,” added Joanna.

“Nay, but an outlet there must be!” Dick answered.

Presently, sure enough, they came to a sharp angle, and then the passage ended in a flight of steps. On the top of that there was a solid flag of stone by way of trap, and to this they both set their backs. It was immovable.

“Some one holdeth it,” suggested Joanna.