He gave the rudder a further tilt, throwing the air-ship to an angle that caused Grove's feet to slip from under him, so that only the support of the rope and the upright held him to his place.

"Shoot!" he bellowed. "Why don't you blaze away at him, Brady?"

Brady had evidently held his fire, hoping to get the air-ship back without injury; and, even now, as his rifle and Pete's began to crack murderously, the target of their bullets was Matt.

Two or three of the leaden spheres zipped past Matt's head, missing him by the narrowest of margins. Strangely enough, however, Matt was more worried about the harm the bullets might do the gas-bag, or the machinery, than he was about any damage they might do him.

Faster and faster he speeded up the engine, and the Hawk raced toward the clouds. She cleared the tops of the trees, gained the clear sky, and, at a height of five hundred feet, was brought to an even keel.

Then, and not till then, did Matt venture a look below. He was just in time to catch one fleeting glimpse of those he had left behind on the "island." What he saw aroused his anger and indignation.

Helen, still true to her resolve to help Matt, had seized hold of her father's rifle and was struggling to keep him from using it. The minute figures were strangely clear, and Matt saw Brady lift his fist and strike the girl down. Then the tops of the trees interposed and cut off the unpleasant sight. Matt faced about, a steely glint in his gray eyes.

"Here's a fine lay out!" Grove was clamoring, far gone with chagrin and baffled rage. "One kid, single-handed, captures two of us and runs off with the air-ship, right under the noses of Brady and the rest! Oh, well, we're entitled to all we get out of this. We don't deserve anything better."

"You'll get something more than you expect," said Matt, picking up the revolver and pushing it into his pocket, "if you don't stop squirming around like that. It's hard to steer when you're rocking the car in such a fashion. You fellows are my prisoners, so make the best of it."

"Yes," growled Grove, "and us two aeronauts will have a fine tale to tell when you take us where you're going to. You've stolen this car. That'll cook your goose for you."