“What do you know about that?” he asked.
“About what?” demanded Alex.
The three blue lights!” answered Jule.
The other boys were all attention now, but all declared that they could see no lights whatever. Presently Jule bounded to the top of the gunwale, steadying himself by the roof of the cabin, and looked toward the distant Indiana shore.
“There they are!” he shouted, “There they are! Three blue lights! Now what do you suppose they mean?”
“They’re probably in a boat?” Clay asked, tentatively.
“Nix on the boat!” Jule protested. “They’re just floating right down flat on top of the wet water.”
Clay now vaulted to the gunwale and followed the direction of the boy’s pointing finger. As he did so, a sharp detonation came from the river, echoing down the stream weirdly, and then the lights he had seen only a moment before disappeared from view.
That was the boys’ first experience with the three blue lights!