from one opening to another with care, one with his torch held high, that they might see ahead, and the other with the light close to the ground, to warn them of a possible pitfall.
"A regiment of soldiers could quarter in here," observed Darry, as they pushed on. "What a defense it would make!"
"An enemy could fire right into the entrance. And, besides, supposing the enemy started to smoke you out? I can smell the smoke from the camp-fire away back here."
At last the two boys reached the passageway back of the rear chamber, and here came to a halt. The dropping water could be plainly heard, and Joe flashed his torch in several directions in the hope of catching sight of the stream.
"I'm going to climb the rocks," he said, after a pause. "Perhaps there is another opening behind them."
"Remember what Benson said, and be careful," cautioned his cousin. "There is no use in taking a risk for nothing."
"Yes, I'll be careful," answered Joe, and crawled forward with care. Da