ture, so wrapped up was he in his trim little monoplane.
After another disheartening look at his air craft, the young inventor started to leave the shop. He looked at a door, the fastening of which Andy had broken to gain admittance.
"I should have had the burglar alarm working, and this would never have happened," reasoned Tom. All the buildings were arranged so that if any one entered them after a certain hour, an alarm would ring in the house. But of late, the alarm had not been set, as Tom and his father were not working on any special inventions that needed guarding. It was due to this oversight that Andy was able to get in undetected.
"But it won't happen again," declared Tom, and he at once began connecting the burglar-apparatus. He went into the house, and told his father and the engineer what had occurred. They were both indignant, and the engineer declared that he would sleep with one eye open all night, ready to respond to the first alarm."
"Oh, there's no danger of Andy coming back right away," said Tom. "He's too frightened. I wouldn't be surprised if he disappeared for a time. He'll be thinking that I'm after him."
This proved true, as Andy had left town next
