“Dad, you must admit that it was a stroke of genius when I bought back that old car,” remarked Penny. “Why, if it hadn’t been for Lena, Al Gepper surely would have escaped.”

“That and the fact you always run your cars on an empty tank,” responded Mr. Parker. “I suppose you foresaw the future when you made your brilliant purchase?”

“Not exactly. It was just a feeling I had—the same sort of hunch which came to me when I found the silken ladder at Kano’s Curio Shop. If I depended upon a mere brain to solve mysteries, why I’d be no better than the police.”

“Your modesty overwhelms me,” chuckled her father. “I’m thankful my other reporters aren’t guided by their instincts. Otherwise I might have a scoop a day.”

“There’s one thing which annoys me,” Penny said, frowning.

“And what is that?”

“Two of Al Gepper’s tricks haven’t been explained. How was he able to raise a table and read a message in a sealed envelope?”

“I was talking to the Chief of Police about that letter trick only this morning, Penny. Magicians often employ it. Wasn’t the message written on a pad of paper before it was placed in the envelope?”

“Yes, it was.”

“Then very likely Gepper read the message from the pad. He could have placed carbon paper beneath the second or third sheets. Possibly he resorted to a thin covering of paraffin wax which would be less noticeable.”