So you'll need your sleep."

"I can swing the day work easily enough," laughed Hazelton. "It will be
all the more easy as the next few days will be taken up simply with
repairing the breaks that have been made."

"Swing the boat in toward land, Mr. Corbett," Tom directed the foreman.

At the little landing Hazelton and Mr. Prenter joined the waiting president
and superintendent.

"Did you really find out anything?" called Mr. Bascomb eagerly.

"It's as big a mystery as ever."

"There's just one thing we'll have to do," sighed Mr. Bascomb, "and that
will be to stop running the camp on a basis of old Puritan laws."

"You talk Reade into it, if you can," chuckled Treasurer Prenter. "You
won't find him easy to convince, either."

Tom didn't wait to discuss the matter. Instead, he signaled to Foreman
Corbett to run the craft out again.

"If you want to, Corbett," suggested Tom, with a laugh, as the boat moved
over the salt waters again, "you might go ashore and go to bed. You can
easily claim that you engaged with us as a foreman, and that being captain
of a motor boat amounts to breach of contract."

"I'm not fussing," smiled the foreman. "As long as I can sleep daytimes
running this motor boat is easier than working."

"It probably will be," nodded Reade, "unless the enemy go in for a new
line of tactics."

"Such as what, sir?" asked Corbett.

"If this boat hampers them too much they may decide to send it to the
bottom with a torpedo."

"Let 'em try, then," grunted the foreman, giving the steering wheel a turn.

Though Reade remained up until broad daylight no further sign of the
unknown enemies was seen. Through the night, had it not been for the
patrols walking up and down the line of wall with lanterns, it would have
been hard to realize that the big breakwater was haunted by any such
desperately practical group of "ghosts."

"I guess we've heard the last of the rascals," suggested Harry Hazelton one
night at supper. Messrs. Bascomb and Prenter had returned to Mobile, so
that the young engineers and their superintendent were the only men at
table.

"My guess is about the same," drawled Mr. Renshaw.

"Yes?" queried Reade. "Guess again!"

"Oh, I believe they've quit," argued Mr. Renshaw. "For one thing, the
scoundrels probably have discovered that detectives from Mobile are down
here trying to run 'em to earth. That has scared the rascals away."

"What are the detectives doing, anyway?"