Boo-oom!

That crash was so close at hand that it seemed as though the earth
must open.

Tom's first startled glance was at the sky. Then, with a whisking
sound, several fragments of something passed over their heads.

"We're being bombarded?" gasped Tom inquiringly.

"This is getting too noisy to be interesting," protested Greg,
waking and leaping over to the place where his chums stood.

"I thought you fellows were going to put a stop to that racket!"
complained Darry from the tent.

Dick Prescott's whole thought and effort had been centered on
the task of placing the location of that latest explosion.

"You fellows look after the camp," Dick called in a low voice
to those in the tent. "Come on, Tom and Greg!"

His two chums hurried to overtake him as the young leader rushed
off in the darkness. Prescott was traveling up the slope in a
direction that ran in an oblique line from the lake front.

"Are you sure it was just exactly in this direction?" whispered
Reade, as he reached Dick's side.