“Hark!”

Another voice was heard beyond the door.

“That is Prof. Babbitt!” whispered several of the hiding ones. “He is dangerous!”

Prof. Babbitt was a man who was continually in trouble with the students, who despised him, and lost no occasion to hector him.

Rap! rap! rap!

Three sharp raps on the door.

Silence within the room.

A hand fell on the latch, and the door was opened. Peering from beneath the bed and from other hiding places the students saw three persons stalk into the room.

“It’s very dark here,” said the voice that sounded like that of Prof. Such.

“I—I think I smell tobacco,” said another voice, which the trembling culprits were certain came from the lips of Prof. Mower.