“That ought to get results,” said Andy. “Anyone listening in on this program who has heard or seen a plane in the last two hours will undoubtedly send in a report.”

“We’ll have a lot of misinformation,” said Timms, “but a real clue may develop.”

“How many stations carried that announcement?” asked Bert.

“The message was sent to about 50 of the major broadcasters,” replied Timms, “and every one of them will put it on the air.”

“In other words, you covered the whole country,” grinned Bert.

“That’s what I hoped to do,” replied Timms. “Now we’ll see just how much value the radio is to the secret service in an emergency when we need the cooperation of the public.”

“You’ll have something definite before midnight,” predicted Bert, who was quick to rise to the defense of his chosen profession.

“It’s seven-thirty now,” said Andy, glancing at the clock in the lobby. “That gives you four and a half hours.”

“That’s enough,” replied Bert. “If there isn’t some real clue by that time I’ll buy your suppers tomorrow night.”

“And if you win?” Andy asked.