“Old stuff,” declared Fred. “Can’t we think of something new?”

“We might blow some smoke through the keyholes or under the doors,” suggested Randy. “Then we could bang on the door and let them think there was a fire.”

“Gosh! that isn’t half bad,” said Fred. “But how shall we make the smoke? We can’t build a fire, or anything of that sort.”

“Some wet paper will do the trick.”

“I don’t think you ought to try that, boys,” declared Jack. “It might bring on a panic, and we don’t want any one to be hurt on this, the last night at the Hall. Come on and see if we can’t get hold of those fellows.”

They passed around a corner of the corridor, and as they did so Gif suddenly clutched the youngest Rover by the arm.

“There go some fellows now!” he whispered. “See them crawling along over there? I wonder who they are and what they’re up to?”

The lights in the hallway had been turned low, and the Rovers and their chums could just make out the forms of four cadets slinking along silently. Then they disappeared from view around one of the numerous corners.

Curious to know what new fun might be in the air, the Rovers and the others followed the crowd like so many shadows. They saw the four cadets who were ahead stop in front of the room which they had left but a few moments before.

“Gee, I know that crowd!” exclaimed Andy, in a low voice. “Those are the very fellows Codfish and Wesley mentioned—the fellows who helped them take our things.”