"Well, I'll tell you, Hampton," Bob heard his father say, "I've got a
sharp attack of spring fever. I think I need a vacation. And if these
two youngsters of mine will let me go along, I'll come out with them."

Bob couldn't control his eagerness. Going up to his father's side, he
pulled insistently at his sleeve.

"Wait a minute, Hampton," said Mr. Temple. "Bob has something on his
mind." He removed the receiver and regarded his son with a twinkle.
"Out with it," he said. "I suppose that quite shamelessly you've been
listening to my conversation."

"No, Dad, Honest Injun," protested Bob. "Only I couldn't help
overhearing that part about you going with us. Say, Dad, we'll go by
airplane, won't we?"

Mr. Temple groaned in mock dismay. "Run along," he said. "You'll drive
me crazy with that airplane business." Then, once more adjusting his
headpiece, he resumed his interrupted conversation with Mr. Hampton.

Bob returned to Frank, wearing a wide grin. "I couldn't resist putting
over that piece of propaganda," he said.

"Do you think he'll let us fly?" whispered Frank.

"Say," answered Bob scornfully, "now that Dad has decided to go along,
it's a cinch. He's as crazy about flying as Mr. Hampton is about the
radiophone."

"Ssst. Ssst," came a warning whisper, interrupting them. They swung