It was easy to see that Mr. Berg was much pleased with
himself.

Meanwhile, Tom and Mr. Damon had reached Atlantis, and had
purchased the oil. They started back, but Tom took a street
leading toward the center of the place, instead of striking
for the beach path, along which they had come.

"Where are you going?" asked Mr. Damon.

"I want to see if that Andy Foger has come back here,"
replied the lad, and he told of having been shut in the tank
by the bully.

"I've never properly punished him for that trick," he went
on, "though we did manage to burst his auto tires. I'm
curious to know how he knew enough to turn that gear and
shut the tank door. He must have been loitering near the
shop, seen me go in the submarine alone, watched his chance
and sneaked in after me. But I'd like to get a complete
explanation, and if I once got hold of Andy I could make him
talk," and Tom clenched his fist in a manner that augured no
good for the squint-eyed lad. "He was stopping at the same
hotel with Mr. Berg, and be hurried away after the trick he
played on me. I next saw him in Shopton, but I thought
perhaps he might have come back here. I'm going to inquire
at the hotel," he added.

Andy's name was not on the register since his hasty
flight, however, and Tom, after inquiring from the clerk and