“And this is one reason,” said Tom, in commenting on this fact, “why I believe it leads to some vast cavern which is connected in some fashion with the outer air. Well, perhaps we shall soon make a discovery.”
Eagerly and anxiously the little party pressed forward by the light of the pocket electric lamps. They were obsessed by two thoughts — what they might find and the necessity for aiding in the rescue of their rivals.
On and on they went, the darkness illuminated only by the torches they carried. But they noticed that the air was still fresh, and that a gentle wind blew toward them. The passage was undoubtedly artificial, a tunnel made by the hands of men now long crumbled into dust. It had a slightly upward slope, and this, Professor Bumper said, indicated that it was bored upward and perhaps into the very heart of the mountain somewhere in the interior of which was the Beecher party.
Just how far they went they did not know, but {i}t must have been more than two miles. Yet they did not tire, for the way was smooth.
Suddenly Tom, who, with Professor Bumper, was in the lead, uttered a cry, as he held his
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torch above his head and flashed it about in a circle.
“We’re blocked!” he exclaimed. “We’re up against a stone wall!”
It was but too true. Confronting them, and extending from side to side across the passage and from roof to floor, was a great rough stone. Immense and solid it seemed when they pushed on it in vain.
“Nothing short of dynamite will move that,” said Ned in despair. “This is a blind lead. We’ll have to go back.”