He came swinging through the hall with long, rapid strides, and as he did so the Rovers and their friends watched him from various doorways and side halls. They saw him unlock his door and throw it open. The next instant came a sudden yell of alarm, and then a tremendous bump. Asa Lemm's feet had struck the sheets of ice on the floor, and they had gone out from under him very suddenly, letting him down flat on his back.

"Hi! hi! what's the meaning of this?" spluttered the teacher; and then, as his hand struck the icy coldness of what was beneath him, he gave another cry. "Ice! What does this mean? Can the water pipes have burst and flooded the room?"

Not without difficulty he managed to regain his feet, and then started to walk to where he could turn on the lights. But again he slipped, and this time he came up against a small table piled high with books and sent this over with a crash.

"Gee! he's sure enjoying himself!" chuckled Andy.

"Come on, fellows, let's see what all the noise is about!" exclaimed Jack in a loud voice. "Something dreadful must be going on in Professor Lemm's room."

"What's the matter—is somebody getting killed?" called out Randy.

"It isn't a fire, is it?" broke in Walt Baxter, catching the cue.

"Sounds to me as if somebody was pulling the school down," was Spouter's contribution.

"Everybody to the rescue!" yelled Ned Lowe.

These cries, combined with the noise which was coming from Asa Lemm's apartment, caused such a commotion that soon fully a score of other cadets showed themselves in the hallway.