“Sounds like an aeroplane!” suggested Jimmie.

“Or like an automobile!” Carl put in.

“Aw, how could an automobile get up here?” demanded Jimmie.

“Don’t you remember the river road Sam was telling us about not long ago?” asked Carl. “I guess an automobile could run along that, all right!”

“Is that so?” asked Jimmie turning to Sam.

“A superior machine driven by a superior chauffeur might,” was the reply. “Anyway, that’s a motor-car coming, and there’s no other way to get in here. We’ll see the lights in a moment.”

“Gee!” Jimmie exclaimed. “Do you think our friends chased the men who stole the Bertha up in a high-power automobile?”

“That’s just what I do think!” exclaimed Carl.

“And that is undoubtedly the fact,” Sam agreed.

Doran and his companion seemed to share in the pleasant anticipations the boys were now sensing, for they approached them in a friendly manner and began asking questions regarding the oncoming machine.