several minutes, listening for the slightest sound.
However, it became apparent that the dark chamber was empty, so Frank switched on the flashlight.
The vivid beam cut the darkness and revealed a gloomy cave in the very center of the cliff, hewn out of the rock. It had been a natural cave, just as the tunnel in the cliff had been a natural passageway, but the roof had been bolstered up by great beams and the sides had been chipped away while the floor had been leveled. It was a secret chamber in the heart of the rock.
The light revealed the fact that this chamber was used as a storeroom, for there were huge boxes, bales and packages distributed about the floor and piled against the walls.
"Smuggled goods!" exclaimed Frank.
His suspicions seemed verified by the fact that the majority of the boxes bore labels of foreign countries. Chinese characters were scribbled across them in practically every case.
Seeing that the chamber was unoccupied, the boys stepped through the doorway and looked about them. The flashlight illuminated the murky corners of the cave.
"This must be where they store all the stuff," Joe said, as he inspected one of the boxes.
