“Want to play a trick on Mumps?”

“Yes, keep your eye peeled for fun.”

This talk took place half an hour before the boys were to start away from the school. Having procured the firecrackers, Pepper sought out the school sneak and found him talking to Billy Sabine, a cadet who was at times a sneak and then again quite a good fellow. Mumps had his gun over his shoulder and Sabine had his firearms across his elbow. Without being observed, The Imp lit the long stems of two firecrackers and dropped one down the barrel of each weapon.

“Hullo, you fellows!” he cried, hurriedly. “Have you heard the news?”

“What’s that?” asked both of the others, while a small crowd began to collect.

“Somebody has sticks of dynamite, and some of the stuff was put in some of the guns,” went on Pepper innocently. “You want to look out, or your gun may explode and blow you to bits.”

“Gracious me, is that possible!” ejaculated Mumps, and turned pale.

“I didn’t know——” began Sabine, and then glanced at the muzzle of his weapon. “I declare, what makes that smoke? And look, your gun is smoking, too!” he added, to Mumps.

“It’s the dynamite——” began Pepper, and backed away as if in terror.

“Oh, dear, do you really think so?” quaked Mumps. “If I thought—— Oh!”