"Nonsense, Ronicky."

"There's got to be," said Ronicky very soberly, "because, if there ain't, you and me are dead ones, Jerry. Come along and help me look, anyway."

Jerry rose obediently and flashed on his precious pocket torch, and they went down to pass the turn and come again to the ragged wall of earth which terminated the passage. Jerry held the torch and passed it close to the dirt. All was solid. There was no sign of anything wrong. The very pick marks were clearly defined.

"Hold on," whispered Ronicky Doone. "Hold on, Jerry. I seen something." He snatched the electric torch, and together they peered at the patch from which the dried earth had fallen.

"Queer for hardpan to break up like that," muttered Ronicky, cutting into the surface beneath the patch, with the point of his hunting knife. Instantly there was the sharp gritting of steel against steel.

The shout of Ronicky was an indrawn breath. The shout of Jerry Smith was a moan of relief.

Ronicky continued his observations. The thing was very clear. They had dug the tunnel to this point and excavated a place which they had guarded with a steel door, but, in order to conceal the hiding place, or whatever it might be, they cunningly worked the false wall of dirt against the face of it, using clay and a thin coating of plaster as a base.

"It's a place they don't use very often, maybe," said Ronicky, "and that's why they can afford to put up this fake wall of plaster and mud after every time they want to come down here. Pretty clever to leave that little pile of dirt on the floor, just like it had been worked off by the picks, eh? But we've found 'em, Jerry, and now all we got to do is to get to the door and into whatever lies beyond."

"We'd better hurry, then," cried Jerry.

"How come?"