town had, for Andy Foger and his two cronies
were on hand, and they usually tell all they know."

"Oh, Andy Foger! He makes me sick! He was scooting up the street in his
auto just as I was coming in, 'honking-honking' his horn to beat the
band! You'd think no one ever had an auto but him. He certainly was
going fast."

"Wait until I get in our airship," predicted Tom. "Then I'll show you
what speed is!"

"Do you really think it will go fast?"

"Of course it will! Fast enough to catch Anson Morse and his crowd of
scoundrels if we could get on their track."

"Why, I thought they were in jail," replied Ned, in some surprise.
"Weren't they arrested after they stole your boat?"

"Yes, and put in jail, but they managed to get out, and now they're
free to make trouble for us again."

"Are you sure they're out of jail?" asked Ned, and Tom noted that his
chum's face wore an odd look.

"Sure? Of course I am. But why do you ask?"

Ned did not answer for a moment. He glanced at Tom's father, and the
young inventor understood. Mr. Swift was getting rather along in age,
and his long years of brain work had made him nervous. He had a great
fear of Morse and his gang, for they had made much trouble for him in
the past. Tom appreciated his chum's hesitancy, and guessed that Ned
had something to say that he did not want Mr. Swift to hear.

"Come on up to my room, Ned. I've got something I want to show you,"
exclaimed Tom, after a pause.

The two lads left the room, Tom glancing apprehensively at his father.
But Mr. Swift was so engrossed, together with the aeronaut, in making
some calculations regarding wind pressure, that it is doubtful if
either of the men were aware that the boys had gone.

"Now what is it, Ned?" demanded our hero, when they were safe in his
apartment. "Something's up. I can tell by your manner. What is it?"

"Maybe it's nothing at all," went on his chum. "If I had known, though
that those men had gotten out of jail, I would have paid more attention
to what I saw to-night, as I was leaving the bank to come here."

"What did you see?" demanded Tom, and his manner, which had been calm,
became somewhat excited.

"Well, you know I've been helping the paying-teller straighten up his
books," went on the young bank employee, "and when I came out to-night,
after working for several hours, I was glad enough to hurry away from
the 'slave-den,' as I call it. I almost ran up the street, not looking
where I was