“Oh, yes,” agreed Uncle Tod. “It was very good of you to bring Rick and his chum—not forgetting Ruddy. Perhaps among us all now, we’ll be able to solve the mystery.”

Mr. Campbell departed in his auto next morning, after an uneventful night, though Rick and Chot rather looked for some excitement—perhaps a return visit of Zeek Took after dark. But nothing like that happened.

“Well, boys, what do you say to some explorations to-day?” asked Uncle Tod, when breakfast was a thing of the past.

“Explorations in the cave of Lost River?” asked Rick.

“That’s where I mean. Are you game for it?”

“Sure!” answered both boys, and Rick added: “Aren’t we, Ruddy?”

The dog leaped about, barking joyfully, for he liked action of any sort.

“You going in that spooky place again?” asked Sam, as Uncle Tod made preparations for entering the cavern.

“Of course. Don’t you want to come? We’ve got to find water somehow, Sam.”

“Not me!” he exclaimed emphatically. “When I want ghosts I like ’em in the open. And as far as getting back Lost River goes—it’ll never happen.”