“Yes. And it went across the hallway into Colonel Colby’s office!” gasped Andy, who had scrambled to his feet and given a glance downward.

“Skip for it!” put in his twin brother quickly. “We mustn’t be caught at this.”

The warning was not needed, for all of the cadets were already scrambling through the corridor and away from the stairs as rapidly as possible. They came to a halt in front of Room 18, that which Jack occupied.

“Skip inside and pretend to be reading or studying,” said the oldest of the Rover boys.

“I think we had better go to our own rooms,” said Gif to Phil and Spouter. “And remember, mum is the word,” he added for the benefit of the others.

“There’ll be some fun sooner or later, believe me,” remarked Fred. “Andy, why did you push that snowball downstairs on top of old Duke?”

“I didn’t do it on purpose. I slipped,” was the answer. “But come before they start to investigate.” And then he slipped into Jack’s room, followed by his cousins.

And here let me pause for a moment to tell something about the Rover boys and how it was that they came to be at Colby Hall. My old readers will not need this introduction, and, therefore, I shall not feel hurt if they skip my words on the subject.

In the first volume of this line, entitled “The Rover Boys at School,” I introduced three brothers, Dick, Tom, and Sam Rover, and told how they were sent to Putnam Hall Military Academy where they made a number of chums, including a cadet named Lawrence Colby.

Passing through Putnam Hall successfully, the three brothers next attended Brill College, and then went into business in New York City, where they organized The Rover Company, with offices on Wall Street.