"That's queer," spoke Tom. "I wonder what he wants?"

"I'll soon see," rejoined Mr. Swift, and he started on a run toward
where the man was hiding. Tom followed his father, and as the two
inventors reached the box the man sprang from behind it and down the
yard to a lane that passed in back of the Swift house. As he ran he
was seen to stuff some papers in his pocket.

"My plans! He's stolen some of my plans!" cried Mr. Swift. "Catch
him, Tom!"

Tom ran after the stranger, whose curious actions had roused their
suspicions, while Mr. Swift entered the motor shop to ascertain
whether anything had been stolen.




CHAPTER IX.

A FRUITLESS PURSUIT


Down through the yard Tom speeded, in and out among the buildings,
looking on every side for a sight of the bold stranger. No one was
to be seen.

"He can't be very far ahead." thought Tom. "I ought to catch him
before he gets to the woods. If he reaches there he has a good