Chapter X
The Great Discovery
"I'll bet that light's a signal light," whispered Joe Hardy to his brother.
The boys watched the yellow gleam among the trees. Then, slowly, the light began to move. It swung to and fro, as though it was being carried by some one, and finally vanished.
Frank led the way down the path. In a few minutes they heard a snapping of twigs that indicated that the two men were not far ahead. The path dipped sharply, down a rocky slope, sparsely covered with underbrush. Then the brook came into view.
They could see the pair clearly now. One of the men was carrying a lantern; the other bore the long poles and the bag. Drawn up on the side of the brook, below the rocks and just above its mouth, the boys distinguished a small boat.
They crouched in the shelter of the bushes, and watched as the man who carried the lan-
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