"Just the same speed, Hal?" the young captain asked.

"Hasn't changed a single revolution per minute," Hastings answered,
briefly.

With his watch on the table before him, and employing the scale rule and
dividers, the young submarine skipper placed a new dot on the chart.

"Something ought to be happening in three quarters of an hour," Benson
remarked, with a chuckle, to Mr. Pollard.

Less than half an hour later the young submarine skipper climbed up into
the conning tower beside Eph.

"Same old straight course, eh, lad?" asked Jack quietly.

"You know it," retorted Eph.

"Then we're where we ought to be," responded Jack Benson, bending
forward. With his right hand on the speed control he shut off speed.

"Now, just sit where you are, Eph, until I come up again," advised the
young commander.

"Going to the surface?" demanded Somers, with interest.

"Pretty close," nodded Benson.

Calling Mr. Pollard to his aid, Jack began to operate the machinery that
admitted compressed air to the water tanks, expelling the water