"What's going on in there?" Tom Reade called in through the tunnel.
"Stay where you are," Dalzell called back, "and don't let us get bagged in here by any one."
Then Dan straightened up on his feet and took several curious looks about him while Dick flashed the light.
"Say, this is bigger'n a barn in here, only not so high!" gasped Dan.
"I wonder why nobody ever knew of this dandy place before?" mused Dave. "And the air's good in here, too."
"The air's good enough," Dick assented hurriedly. "But what we came here for was to see whether we can find Greg. Come on, fellows—be quick."
"This leads to nothing, after all," sighed Dave Darrin at last.
"There may be other parts to the cave that we haven't found yet," advanced young Prescott. "Now, halt, everyone! Quiet! Greg?"
Dick's voice echoed in the place. Away off in one corner something seemed to be stirring.
"What's that?" asked Dick quickly.