The two Dawsons lifted the bundle at their feet and started from the room. There were sounds as if some one was pounding on the door at the front of the building. The Dawsons, however, did not go that way. They quickened their steps, the captives were led through several rooms, and finally a door at the rear of the place was opened.
"Hold them tight now," ordered Jerry.
"Yes, and if they make any outcry quiet them the way you know how," added his father.
Dave and Hiram were surprised to find themselves now in complete darkness.
"We're going through some kind of a tunnel," whispered the young aviator to his companion a moment later.
Their captors forced them along in the steps of the Dawsons. They must have proceeded several hundred feet thus, when the tunnel grew lighter. Then they arrived at an exit letting out into a deep, narrow ravine.
"They must have taken this route to escape from the revenue officers," Dave told his companion, in a guarded tone.
"Shall we set up a fight and yell?" proposed the audacious Hiram.
"Not with that broken arm of yours and four to one," dissented Dave.
"Broken arm, nothing! Say-hello! Why, they're taking us to their airship!" exclaimed Hiram.