"We'll be alone here and can talk the matter over without fear of interruption," said one of the pair, the man in ordinary clothes.
His voice sounded strangely familiar, and Dave strained his eyes to catch a better sight of him and of his companion.
Then, astonished beyond measure, the young diver dropped out of sight behind a rock bordering the underground stream he had been trying to cross.
The newcomers were Lemuel Hankers, the man who had set sail in the Raven after the sunken treasure, and Pete Rackley, the rascal who in Washington had accused Dave of robbing him!
CHAPTER X
DAVE OVERHEARS A PLOT
"They are here for no good purpose!"
Such was the thought which crossed Dave's mind immediately after making his astonishing discovery.
As much as he wished to be saved from his present direful situation, he resolved to keep his presence a secret.
These men were his enemies, and by instinct he felt that Pete Rackley must be Lemuel Hankers' tool.