"Feel it. We'll go in the dark. Then we can see their lantern the quicker."
"There's no wood here fit for torches," Bob admitted. "And I have plenty of matches. Come on! We sha'n't get lost."
"What do you really suppose has happened to them?" demanded Helen of Bob, as soon as they were out of hearing of the camp.
"Give it up. Something extraordinary—that's positive," declared the big fellow.
They crept through the tunnel, Bob lighting a match occasionally, until they reached the first crack in the roof, open to the sky. It was not snowing very hard.
"Of course they wouldn't have tried climbing up here to get out," queried Helen.
"Of course not!" exclaimed Ann. "What for?"
"No," said Bobbins. "They kept straight ahead—and so will we."
In five minutes, however, when they stopped, whispering, in a little chamber, Ann suddenly seized her companions and commanded them to hold their breath!
"I hear something," she whispered.