x the motor better?" he shouted at the two machinists as
they came running up, followed by the crowd.

"Fix it better? The motor was all right," declared the taller
machinist. "Any of them are likely to stop unexpectedly."

"Well, I didn't think mine would," came from Andy. "Now look at my
airship! It's all busted!"

"No, it isn't hurt much," said the other man, after critically
looking it over. "We can fix it, and you'll fly yet, Andy."

"I hope I do, if only to fool Tom Swift," declared the bully, as he
wiped some of the mud from his face. "Come on, now, help me wheel
the machine back, and I'll try it again."

Andy made another attempt, but this time the machine did not even
rise off the ground, and then, amid the jeers of the crowd, the
discomfited lad took his aeroplane back to the shed in the rear of
his house.

"I'll fix it yet, and make a long flight," he declared. "I'll show
Tom Swift he can't laugh at me!"

"You'll make a long flight eh?" asked one of the machinists. "Where
will you go?"

"Never mind," answered Andy, with a knowing wink. "I've got a plan
up my sleeve--my father and I are going to do something that will
astonish everybody in Shopton," and then Andy, with many nods and
winks, went into the shed, where he began giving orders about the
airship. He wanted the motor changed, and one of the machinists made
some suggestions about the planes, which, he said, would give better
results.

As for Tom and Ned, they strolled away, satisfied that in Andy Foger
they would not have a very dangerous rival, as far as airships were
concerned.

Tom thought matters over during the next few days. He was now
satisfied that Andy had a copy of the map, and, as far as he could
see, there was no way of getting it from him, for he could not prove
to the satisfaction of the legal authorities that the bully actually
had it.

"We'll just have to take a chance, that's all," decided the young
inventor in talking matters over with his father, Ned, and Abe
Abercrombie. "If Andy and some of his crowd trail after us, we'll
just have to run away from them and get to the valley first."

"If they do get there, they won't find it very easy traveling I
reckon," remarked Abe. "They'll get all they want of the caves of
ice. But hadn't we better get a hustle on ourselves, Tom?"

"Yes, we will soon start now. I have the RED CLOUD all packed up for
shipment to Seattle. We will send it on ahead, and then follow, for
it will