“Still!” cautioned Frank. “We must not alarm that dwarf too much. He has wonderfully keen ears.”
The passage, in places, broadened into great chambers, while in other places it narrowed till they were forced to make their way along one at a time.
“If we lose sight of those lights we may have some trouble getting out,” whispered Harry.
“That’s so,” confessed Merriwell. “I have seen other passages besides the one taken by them.”
The thought of being lost underground in that great cave was enough to turn them cold with fear.
And then, without the least warning, the lights in advance suddenly vanished.
“Down!” whispered Merriwell. “I believe they have discovered we are after them. Close to the ground and listen!”
Down they crouched, their hearts beating riotously in their bosoms.
Not a sound seemed to break the deathlike stillness of the cave.
“What’s happened?” whispered Harry. “Where have they gone?”