“Go on, Arlington!” he said. “Hustle! Prove it—or you will wish you had!”

Once more they stole softly forward, quickly coming to the spot where the bridge could be seen.

Chester had feared the trio might have left the bridge during his absence; but his heart gave a leap of triumph as he saw they were still there. Dick was talking to both of the girls now, while Zona was idly tossing pebbles into the pool below the bridge.

“There!” panted Chet. “There they are! Now you see! Now you’re satisfied!”

Hal stood quite still for a moment, then began to retreat softly, drawing back so that he could not be seen by the three on the bridge.

Chester followed, eagerly demanding:

“What are you going to do? Aren’t you going down there and pitch into him?”

“You poor fool,” retorted Hal, in the greatest disgust. “You miserable, sneaking spy!”

“Here! here!” grated Arlington. “What do you mean by talking like that?”

“Why, you blithering idiot,” said Darrell, “that’s not Doris down there with them! That’s your own sister, June!”