"Stop!" commanded the master of the school, and stepped out from behind a screen which stood near a corner of the apartment.
"Oh!" ejaculated Nappy. "We're discovered!" and, dropping the bottle of ink in his hands, he started to run.
"Not so quick, Martell!" came from the doorway, and then both of the youths were startled to see themselves confronted by Bob Nixon. Behind the chauffeur stood Captain Dale, while in another doorway appeared the form of Professor Brice.
"Wa—wa—what does this mean?" stammered Slugger. He knew not what to say or do.
"It means that I have found you out," answered Colonel Colby sternly. "You will both march over to my office at once."
CHAPTER XVIII
HOME AGAIN
"Good riddance to bad rubbish!"