“That will do,” snapped the major. “You will find out that this is a military school and not a place where you can do as you like. I will place twenty-five demerits beside your name for what you did that day.”

“Very well, sir,” said Jim, calmly.

“Wait a minute, Major Tireson,” said Don, with equal quietness, but with a determined look in the set of his jaw. “You will do nothing of the kind!”

The major’s eyes bulged. “Silence, sir! How dare you speak to me when I am not even addressing you?”

“I repeat what I said,” returned Don, coolly. “You will place no demerit marks against Jim’s name. We both expect to graduate from here with clean records and we will permit no marks to be placed against us unless we knowingly break the rules. Jim didn’t do that and so you will not do what you said you will do!”

“Mercer,” snarled the major. “I will order you under arrest!”

“You may do what you like,” retorted Don. “But it will do you no good. Every cadet in this school knows that what happened is your fault, Major Tireson, and not anyone else’s. Every cadet is blaming Lieutenant Stillman for having taken demerit marks from you. You yourself know that you made no effort to check up and find out if the second lieutenant knew his orders, and under those circumstances Jim will not take any punishment from you or from anyone else!”

For one moment the temporary headmaster glared at him and then his tone became cold. “Report yourself under arrest, Mr. Mercer,” he commanded.

“Certainly, sir,” agreed Don with composure. “Until tomorrow evening, and if you have not released me by then I shall leave the school for good!”

“Remain in your room under arrest, Mr. Mercer,” repeated the major, and turning on his heel he went out, banging the door after him.