On the floor, in a corner, was a box with ordinary firecrackers in it—about two hundred packs in all. On top of this was a package in paper containing the big cannon cracker.

"Lookout!"

"It's on fire!"

Thus yelled both boys as they saw that the flames from the brushwood had made their way into a corner of the garage, just where the firecrackers had been placed. For an instant they hesitated, then both leaped forward again and commenced to stamp out the fire.

It had caught at a corner of the box containing the smaller firecrackers and was also at the paper containing the cannon cracker. This Phil caught up, knocking the fire away with his hand.

"What are you after, anyway?" The question came from Dave, who had followed his chums into the building. Buster, Shadow, and Luke were outside, at the rear, helping to pull the brushwood away and stamp out the flames.

"Firecrackers—a box full!" cried Roger. "We must get it out!"

"A giant firecracker!" added Phil. "Big enough to blow down a house!" And he held up the package and then made a dive for the outer air, for the garage was now full of smoke.

Dave understood on the instant, and stooped to pick up one end of the burning box. Roger took the other end, and thus they ran from the garage.

Crack! crack! crack! It was the small firecrackers in the box that were beginning to go off, the pieces flying through a lower corner of the burning box.