opened. Tom unlocked a side door and admitted Mr. Jackson, and then,
the incandescent light having been turned on, the two looked around
the apartment. Nothing in it had been disturbed, and the safe had
not been opened.

"I heard him just in time," commented Tom, telling the engineer what
had happened. "I wish I had thought to get between him and the
window. Then he couldn't have gotten away."

"He might have injured you, though," said Mr. Jackson. "We'll go
outside now, and look--"

"Is any one killed? Are you both murdered?" cried Mrs. Baggert at
the dining-room door. "If any one is killed I'm not coming in there.
I can't bear the sight of blood."

"No one is hurt," declared Tom with a laugh. "Come on in, Mrs.
Baggert," and the housekeeper entered, her hair all done up in curl
papers.

"Oh, my goodness me!" she exclaimed. "When I heard that cannon go
off I was sure the house was coming down. How is it some one wasn't
killed?"

"That wasn't a cannon; it was only my little rifle," said Tom, and
then he told again, for the benefit of the housekeeper, the story of
what had happened.

"We'd better hurry and look around the premises," suggested Mr.
Jackson. "Maybe he is hiding, and will come back, or perhaps he has
some confederates on the watch."

"Not much danger of that," declared Tom. "Happy Harry is far enough
away from here now, and so are his confederates, if he had any,
which I doubt. Still, it will do no harm to take a look around."

A search resulted in nothing, however, and the Swift household had
soon settled down again, though no one slept soundly during the
remainder of the night.

In the morning Tom sent word of what had happened to the police of
Shopton. Some officers came out to the house, but, beyond looking
wisely at the window by which the burglar had entered and at some
footprints in the garden, they could do nothing. Tom wanted to go
off on his motor-cycle on a tour of the surrounding neighborhood to
see if he could get any clues, but he did not think it would be wise
in the absence of his father. He thought it would be better to
remain at home, in case any further efforts were made to get
possession of valuable models or papers.

"There's not much likelihood of that, though," said Tom to the old
engineer. "Those fellows have what they want, and are not going to
bother us again. I would like to get that model back for dad,
though. If they file it and take out a patent, even if he can p