"Dick, what do you make of the whole affair?" asked Greg.

"I only wish I could guess the answer," Prescott made answer solemnly,
"but I can't."

"What are we going to do about it?" asked Tom Reade.

"Let it alone," proposed Harry Hazelton.

"No, we won't," said Dick promptly. "Not unless we have to, just
because of inability to find out anything. Fellows, it's too
late to try to do anything in the darkness to-night. If the man
were drowned, we couldn't help him, anyway. But we'll go over
there to-morrow and try to find out whether there is any other
answer to the riddle."

"You won't need any supper to-night, anyway," declared Reade,
in a tone of grim triumph.

"That is where you lose," Prescott answered quietly. "You'll
be hungry, too, Tom, when the food goes on the table."

However, neither Reade nor Danny Grin ate very heartily that evening.
Every few moments the haunting face rose before their memories.
It proved a dull evening, too, in camp. The sky became overcast.
It looked so much like rain that Dick & Co. voted in favor of
retiring early.

First of all, however, the canoe was hauled into the tent for