thud as some timbers fell, and a current of air carried some smoke into the cell.
"We must get out—somehow, some way!" cried Dick. "If we don't, we'll be caught like beasts in a cage." A sudden thought struck him. "Tom, take up one of the stones."
Dick lit what was left of the candle-wick as he spoke and placed it on the bench. Then he took up the other stone.
"Now, aim for the lock of the door," he went on, "and both throw together. Ready?"
"Yes."
"One, two, three!"
Crash! Both large stones hit the door with tremendous force. The barrier was split from end to end, but still held firm.
"Again!" cried Dick, and once more the stones were hurled in mad desperation. There was another crash, and the door tottered and came away from the lock. Then Tom threw his weight against it and it burst open fully.
A rush of hot air and smoke greeted them as they leaped into the passageway. Looking up, they saw that the flooring above was already burning.
"We can't go up through the trap-door," said Dick. "We have got to find some other way out."
"Is there another way?"
