“It sure is,” Kentucky agreed. He was thinking of old Nicodemus and the moon that would hang like a Japanese lantern over the hills that night.

And so they glided on down past Stone Mountain to the mouth of Pounding Mill Creek and fresh adventure.

CHAPTER XVIII
TEN GALLONS OF AIR

Johnny’s first visit on the following morning was at the old mill. He found Donald Day busy as usual, compressing liquid air.

“Glad to see you, Johnny,” were his welcoming words.

“Thanks,” Johnny grinned. “Had a bolt of lightning from the blue sky yet?”

“Not yet, Johnny, but soon,” Donald smiled a mysterious smile.

“How’s the chance of helping you?”

“Fine, Johnny, when the time comes. Just now though, there’s something else you might do.”

“What’s that?” Johnny was ready for anything.