“Any mail?” inquired Dave.

“Yes, a letter and a telegram,” replied Hiram, handing two envelopes to Dave.

The young aviator opened the telegram first. He looked at its enclosure so long and steadily that his two friends began to regard him with deep curiosity.

“Well, that’s queer,” said Dave at length.

“What is?” challenged Hiram.

“This message.”

“Who is it from?”

“The Interstate people.”

“What does it say?” asked Hiram.

“I’ll read it: ‘Good advertising—keep it up.’”