“Oh, is that so?” said Vernon, coldly.

“My lawyer has placed certain documents and information in my hands,” continued Mr. Brackett. “One of them,” and he reached into his pocket and produced a photograph, “is a picture of a man who served a prison term. Do you recognize it?” and the speaker held up the photograph full in the lamp light.

Vernon changed color. He quaked and wriggled about, but he was silent, for it was his own portrait, in prison garb.

“How far the word of a convict will go against that of my son, whom you duped into signing notes he could not pay, and which I will never pay, for no consideration was involved, I do not know,” proceeded the aeroplane manufacturer. “I do know, however, that you dare not make another move. This document,” and he showed a folded paper, “describes you as the man who is wanted in Boston for forfeiting a bail bond. I have only to send word to the authorities there of your whereabouts to have you shut up for some time to come. Now go. If I so much as hear of your hanging around this vicinity, I will telegraph to the people who are searching for you.”

Mr. Brackett pointed to the doorway. Vernon arose and like a whipped cur slunk through it. An expression of relief crossed Elmer Brackett’s face.

“I only hope we are rid of him for good,” he said, fervently.

“There seems to be no doubt of that,” declared Hiram, with a satisfied smile. “Say, though, I wonder why he was sneaking around the hangar here?”

“To pick up what information he could about our plans, to disturb them if he could, I suppose,” said Elmer.

Just then Dave appeared. His friends noticed that he was somewhat thoughtful. No one alluded to the visit of the girl whom the young aviator had just escorted to the automobile. Dave did not seem to have any explanations to make. The others told him about the discovery of Vernon and his summary disappearance. Then the incident was dismissed from their minds as they all went over to the restaurant at the other end of the big aviation grounds for supper.

Dave told his young assistants that he had an engagement in the city the next morning. There were some little purchases to make for the Comet, and he took Hiram along with him.