could be seen, in the dim light, stalking cautiously along.
"I wonder where the uninvited guests are?" asked Torn.
"Probably in the airship shed," answered Ned. "Koku was after them as soon as the alarm went off, and they couldn't have gotten away. They must be inside there yet. But what can their game be?"
"It's hard to say," admitted Tom. "They may be trying to get something belonging to me or they may imagine they can pick up some valuable secrets. Or they may" He stopped suddenly, and then exclaimed:
"Come on, Ned! They're after one of the airships! That's it! My big biplane is all ready to start, and they can get it in motion inside of a few seconds. Oh, why didn't I hurry?" he added, bitterly.
But the hangar was still some distance away, and it would take two or three minutes of running to reach it.
Meanwhile, and at the instant Tom had his thought of the possible theft of his biggest aircraft, something happened.
The doors of the shed were suddenly thrown open, and the two boys could see the large airship being wheeled out. The hazy light of the
