“I guess it was put there for our benefit,” put in Pepper. “We were about to enter the room when you came along.”

“Humph! A silly trick.”

“How did you happen to catch it, Mr. Crabtree?” asked Andy, curiously.

“I was going into the room to see if the windows were closed. There is a great draught through this hallway, as you can feel. Then you do not know who did this?” went on the instructor, gazing sharply at the assembled pupils.

All looked blankly at each other. Dan Baxter and his cronies took good care to keep in the background.

“Gather up the snow and throw it out of a window,” ordered Josiah Crabtree, and this was done, but not before several snowballs had been thrown, one catching Mumps in the neck and another landing on Reff Ritter’s left ear. Then the throwing was stopped, order was restored, and all of the cadets were told to retire.

“Somebody put up a job on us right enough,” observed Pepper, when he and his chums were in the dormitory and the door had been closed. “If old Crabtree hadn’t come along one of us would have gotten that dose.”

“I’ll wager that I know who is guilty,” came from Dale.

“Dan Baxter and his crowd?”

“Exactly. Didn’t you see how they hung back and how they grinned at us?”