"I wonder if they've gone away?" thought Tom. "I can't hear any noise."
He listened intently. It was dark and silent in the shop. Suddenly the light flashed up brighter than before, and the young inventor caught sight of a man walking around the new aeroplane, examining it carefully. He carried, as Tom could see, a large-sized electric flash-lamp, with a brilliant tungsten filament, which gave a powerful light.
As the youth watched, he saw the intruder place the light on a bench, in such a position that the rays fell full upon the Humming-Bird. Then, adjusting the spring switch so that the light would continue to glow, the man stepped back and drew something from an inner pocket.
"I wonder what he's up to?" mused Tom. "I wish Eradicate and Mr. Jackson would hurry back. Who can that fellow be, I wonder? I've never seen him before, as far as I know. I thought sure it was going to turn out to be Andy Foger!"
Tom turned around to look into the dark yard surrounding the shed. He was anxious to hear the approach of his two allies, but there was no sound of their footsteps.
As he turned back to watch the man he could not repress a cry of alarm, for what the intruder had drawn from his pocket was a small hatchet, and he was advancing with it toward the Humming-Bird!
"He's going to destroy my aeroplane!" gasped Tom, and he raised his revolver to fire.
He did not intend to shoot at the man, but only to fire to scare him, and thus hasten the coming of Mr. Jackson and the colored man. But there was no need of this, for an instant later the two came running up silently, Eradicate with a big club.
"Whar am he?" he asked in a hoarse whisper. "Let me git at him, Massa Tom!"
"Hush!" exclaimed the young inventor. "We have no time to lose! He's in there, getting ready to chop my aeroplane to bits! Go to the back door, Rad, and if he tries to come out don't let him get away."