terday afternoon, who was loitering about the hangars and acting in a suspicious way?" asked the friendly pilot, as they rode along. "More than a few of the fellows say he must have been a spy, and up to some mischief, because he slipped off so slickly."
"I had him in mind all the while," said Tom. "And if any mischief has been done, of course we can lay it at his door; though just how he managed to work we'll perhaps never know."
"I caught sight of him, too," Jack remarked; "and I only wish now I'd had a good look at the chap who owned those pigeons to-day, so as to tell if they were one and the same, which I believe to be a fact."
Just then Tom gave his chum a kick with the toe of his shoe. This suddenly reminded Jack that he was treading on forbidden ground, since they had resolved not to say anything to a third person concerning the adventure of that afternoon.
The other member of the escadrille was looking interested. He understood that Tom and Jack must have met with some singular adventure; but since they did not see fit to take him into their confidence he was too polite to ask questions, feeling there must be a good reason for their silence.
Presently they arrived at the hangars. It was
