“Fly? Do you really mean t’ say you folks are goin’ up in that thing?” asked the man, incredulously.

“Well, we’ve done it many times before this, and if all goes right we’ll do it again,” spoke Ned.

“Great Peter!” cried the man. “I thought it was only a model t’ look at. An’ you’re really goin’ t’ fly?”

“We sure are,” said Jerry. “Here, Ned, just hold this bolt, while I tighten the nut, will you?”

“What does this handle do?” asked the man, as he pulled one of the many levers.

“That works the elevating rudder,” replied Jerry. “Please don’t touch it.”

“All right,” agreed the man, good-naturedly. “But what are you folks aimin’ t’ do when you do get your shebang together?”

It was the question the boys had been anticipating ever since they arrived in Kabspell, and they were ready for it.

“Did you see that small man—the one with no hair on his head?” asked Jerry, with a wink at his chums.