“It was certainly filled with stones, Andy,” said Dan. “The fellows who were hurt were hit by stones and not by pieces of the cannon.”

“Then somebody fixed that cannon after we placed the charge in it!” exclaimed Randy. “Now, who could have done that?”

“Jimminy beeswax, I’ve got it!” ejaculated his twin. “Codfish! That’s what he was sneaking around for!”

“I believe you’re right!” put in Fred. “He’s just the sneak to play a mean trick like that. He knew you were going to fire the cannon and he filled it with stones just to make trouble for you.”

“Come on, let’s go after him before Colonel Colby comes!” cried Randy. “I’ll get the truth out of that sneak if I have to hammer the daylights out of him.”

It was no easy matter to locate Henry Stowell. He was not on the campus nor in the gymnasium. Nor was he to be found in the room he and another cadet occupied.

“That proves he’s guilty,” was Andy’s comment. “He wouldn’t hide like this if he didn’t have something to be afraid of.”

In one of the corridors they met several of the cadets, and one of these stated that he had seen Stowell walking toward the Hall garage. At once the twins and Fred started in that direction.

“I’ll bet Codfish is going to keep out of sight until it’s time to turn in,” said Fred.