The balloon was about filled with hot air and the men were merely keeping the air warm until the professor should arrive.

As Leo stood by watching the arrangements an outsider came up.

"Too bad!" he said.

"What's too bad?"

"The professor can't get here to-day."

"Why not?"

"He has been taken sick and is at the hotel in New Haven."

"That will be a big disappointment to this crowd."

"I admit it, but it can't be helped."

The boy listened to the conversation with interest.

He pushed his way to where the man in charge of the balloon stood.

"I'll go up in the balloon for you, if you'll pay me," he said.

"You!" the man looked at him in astonishment.

"Yes."

"It won't do, my lad. The crowd want somebody who will make a parachute jump, and all that."

"I'll make the parachute jump if you'll give me a few instructions."

The man laughed.

"You're a daring youngster, to say the least," he remarked. "Why, you might break your neck."

"No, I wouldn't," returned Leo confidently.

"Well, I'm much obliged, but I can't use your services."

"Let me get in the basket and see how it feels, will you?" asked the boy, after a pause.

"Well, seeing as you are so anxious, I'll oblige you," laughed the man.

The basket rested on the ground, directly to one side of the fire, with which the air in the swaying monster was kept hot.

Hardly had the man given permission than Leo entered the wicker inclosure.

It was about six feet in diameter and filled with bags of sand for ballast.

To one side of the basket was attached a parachute. This the balloonist used in making his daring jumps from the clouds.

As Leo sat in the basket the crowd gathered around him.

"Hullo, Leo Dunbar! what are you doing in that basket?" asked Ben Barkley, one of the rich boys of Hopsville.

"Going to make an ascension," returned Leo jokingly.

"Bet you ten dollars you are not," laughed Ben.

"All right; I'll take you up. But you must loan me the money, Ben."

"How is it old Hawkins gave you a day off?" went on Ben. "Thought he was too mean to give anybody a holiday."

"So he is, Ben. I took a day off and I'm going to take more."

"Phew! What do you mean? Have you and the old man parted company?"

"We have."

"It is a wonder he would let you go-he got so much work out of you."

"He didn't let me go. I ran away."

Ben Barkley's eyes opened widely.

"You don't mean it!"

"I do! I'm tired of being his slave."

"I don't blame you a bit for leaving," was Ben's decided reply. "I know what a hard-hearted man he is."

"I'm going to carve my own way to fortune."

"What are you going to do?"

Leo was about to answer when Ben was pushed to one side and the portly form of Daniel Hawkins appeared.

"Ha! ha! So I have found you at last, you scamp!" he cried in a rage. "A pretty run you have given me! And made me pay out twenty-five cents, too, to come in the fair after you!"

Leo was taken completely aback. He had not dreamed that the farmer would follow him into the grounds.

"I'll skin you!" stormed the man, seeing the boy did not immediately answer him.

"Not much you won't," put in Ben Barkley.

"What have you to do with this?" howled Daniel, turning to the rich boy.

"You have no right to abuse Leo," responded Ben.