perfume, adheres to that bit of paper, though the dampness has taken it almost all out."
Jack looked astonished at such shrewd reasoning.
"Well, you are certainly a wonder at seeing through things, Tom," he hastened to say. "And so of course that settles it in my mind. Mrs. Neumann sent this message to me; though how she could have learned that there was anything treacherous going on beats my powers of reasoning."
"But don't you think it would pay to learn if there's any truth about it all?" asked the other pilot, whose curiosity had been stirred up by such a strange happening.
"Yes, let's all go over to the hangars and have the planes out for a regular inspection," said Tom. "If mischief has been done the chances are it would be in a part not usually examined by the machanician before a flight. Then again the damage, if there is any, might be so covered up by the shrewd schemer that it would not be noticeable."
There were always cars going to and fro, for pilots came and went from time to time; so the trio quickly found themselves being whirled along over the road so often traveled in their daily work.
"How about that fellow they chased late yes-
