"Well, Ned, it isn't exactly like going up in
an airship," and Tom Swift who was gazing
over the rail down into the deep blue water of
the Caribbean Sea, over which their vessel was
then steaming, looked at his chum beside him.

"No, and your submarine voyage had it all over
this one for excitement," went on Ned. "When
I think of that----"

"Bless my sea legs!" interrupted Mr. Damon,
overhearing the conversation. "Don't speak of
THAT trip. My wife never forgave me for going
on it. But I had a fine time," he added with a
twinkle of his eyes.

"Yes, that was quite a trip," observed Tom,
as his mind went back to it. "But this one isn't
over yet remember. And I shouldn't be surprised
if we had a little excitement very soon."

"What do you mean?" asked Ned.

Up to this time the voyage from New York
down into the tropical seas had been anything
but exciting. There were not many passengers
besides themselves, and the weather had been
fine.

At first, used as they were to the actions of