It was black as ink in the passage, but the boy's flashlight had recently been supplied with a new battery, and he knew that it would not fail for many hours, so he walked along with confidence.

In perhaps a quarter of an hour the boy came to a blank wall. There appeared to be no way in which the journey could be extended under the hills. The nearest lateral passage was some distance back.

Realizing that no time should be lost, the lad hastened thither and advanced to the south end of the cross passage. Here, too, he came upon a blank wall. While he stood listening a heavy, rumbling voice came to his ears. There were either crevices in that rocky bulkhead or the wall was very thin.

Presently the heavy voice ceased speaking, and then a lighter tone was heard. At first Will could not distinguish the words used, but directly his heart almost bounded into his throat as he listened to Tommy's voice saying:

"I'll break your crust, you old stiff, if you come near me!"

So the boys were still in a position to defend themselves! Will beat frantically on the wall and threw his light hither and yon in search of some opening through which his voice might be heard.

Directly there came an answering sound from the other side.

CHAPTER IX

TWO HUNGRY BEARS

The Little Brass God was gone!