Berg, we'll be doubly on the lookout for you after this. As
for Andy Foger, I think I'll make him wish he'd never locked
me in that tank. So you expect to find out our 'game,' eh,
Mr. Berg? Well, when you do know it, I think it will
astonish you. I only hope you don't learn what it is until
we get at that sunken treasure, though."

But alas for Tom's hopes. Mr. Berg did learn of the object
of the treasure-seekers, and sought to defeat them, as we
shall learn as our story proceeds.




Chapter Six

Turning the Tables


When the young inventor informed his father what he had
overheard Mr. Berg saying, the aged inventor was not as much
worried as his son anticipated.

"All we'll have to do, Tom," he said, "is to keep quiet
about where we are going. Once we have the Advance afloat,
and try her out, we can start on our voyage for the South
American Coast and search for the sunken treasure. When we
begin our voyage under water I defy any one to tell where we
are going, or what our plans are. No, I don't believe we
need worry about Mr. Berg, though he probably means