And to this end they worked.

"You're going to take Grit along; aren't you?" asked Paul of Dick one day, as they were laboring over the aircraft, putting on the finishing touches.

"Oh, sure!" exclaimed the young millionaire. "I wouldn't leave him behind for anything."

"I wonder what army officer they'll assign to us," remarked Innis. "I hope we get some young chap, and not a grizzled old man who'll be a killjoy."

"It's bound to be a young chap, because none of the older men have taken up aviation," said Larry. "I guess we'll be all right. I'll see if I can't find out from our Washington reporter who it will be."

But he was unable to do this, as the government authorities themselves were uncertain.

The time was drawing near when Dick was to make his start in the cross-country flight, with but two landings allowed between New York and San Francisco. Nearly everything was in readiness.

"Mr. Vardon," said Dick one day, "this business of crossing a continent in an airship is a new one on me. I've done it in my touring car, but I confess I don't see how we're going to keep on the proper course, up near the clouds, with no landmarks or anything to guide us.

"But I'm going to leave all that to you. We're in your hands as far as that goes. You'll have to guide the craft, or else tell us how to steer when it comes our turn at the wheel."

"I have been studying this matter," the aviator replied. "I have made several long flights, but never across the continent. But I have carefully charted a course for us to follow. As for landmarks, the government has arranged that.