“You’re talking in absolute riddles.”

“Just be patient and you’ll soon know what I mean,” Penny declared teasingly. “I’d tell you now only it would ruin the surprise.”

She locked the automobile and afoot they quietly stole down a steep winding trail which led to the entrance of the old mine.

CHAPTER XVII
The Man in the Boat

Penny and Rosanna approached the mine entrance cautiously, fearing that someone in the vicinity might observe their movements. However, the place seemed deserted.

“The rowboat is gone,” Penny commented as she pulled aside a clump of bushes to survey the spot where it had been hidden.

“Why, it is! Perhaps the ghost has come and left.”

“I certainly hope not. That would ruin everything. Anyway, we’ll wait and see. It’s early yet.”

After investigating the shore line thoroughly, they found an excellent hiding place in a dense thicket not far from the entrance to the mine. Then they settled themselves to wait.

“What time is it?” Rosanna yawned.