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. Darry held his torch as high up as possible, to light the way.
The youth had advanced a distance of fifty feet when he came to a turn in the passageway. Here the side walls were not over two yards apart, while the roof could be touched with ease.
Thinking the walking better at this point, Joe struck out once more. The flare from his torch showed him something of a chamber ahead, and the water sounded closer than ever.
But hardly had the lad taken a dozen steps when the smooth rock upon which he was advancing tilted up, sending him headlong. As he went down the torch was knocked from his hand. Then he slid forward into the darkness.
"Help!" he managed to cry. "Help!"
"What's up?" came from Darry, but the words were drowned out in the crashing of one stone
