Gilson knew what to do and ran with might and main to where the air was stored.

He turned several cocks and soon the foul air was being forced out of the Holland XI. and fresh air began to circulate through the various compartments.

This had hardly been done when Oscar heard a voice calling him. Then the engineer appeared, as pale as death and with his forehead bandaged.

"Reckon I was knocked out," said George Dross. "What happened?"

"A good many things," answered Oscar. "How do you feel?"

"As weak as a half drowned cat, captain. But what is wrong? Did the lightning knock us inside out?"

"Almost," answered the young commander, and told the engineer some of the particulars.

"I'll do what I can with that engine," said Dross. "But it's a ticklish job—with so much electricity flying around loose."

"Be careful," returned Oscar. "I don't want you to get knocked out for good."

He followed the engineer to the doorway of the engine room and here a long consultation took place.