"Yes, but we don't want the machine ruined, of even tampered with!" exclaimed Sam.
"I don't think anybody will touch it," went on the eldest Rover boy. "After you came up here I got to thinking that maybe Flockley, or Koswell, or Larkspur, or somebody else, might try to injure the Dartaway, and so I went to see Filbury, the janitor, about it. His son Abner is helping him around the dormitories, and I hired Abner for fifty cents a night to sleep in the shed and guard the biplane. Abner has got a shotgun, and he isn't afraid of anybody; so I reckon the Dartaway will be perfectly safe."
"Good for you, Dick!" cried Tom. "Say, I hope if anybody does try to injure the machine Abner gives him a dose of shot!"
"I told him not to shoot anybody unless it was necessary," answered Dick. "But he may shoot into the air, just to scare the intruder and raise an alarm."
The next day was such a busy one for the Rover boys that they had no time to do more than look at the biplane and see that it was safe. Abner Filbury reported that he had slept in a hammock slung beside the machine and that nothing had happened to arouse him. Nobody but the Rovers knew that he was on guard. The boys
