Captain Putnam was notified of the new discovery made and came down to inspect the damage done. His face grew very stern.

“This is positive vandalism,” was his comment. “If any boy in this school is guilty I shall expel him.”

“If you will permit me, Captain Putnam, I’d like to say a word,” said Jack.

“What is it, Major Ruddy.”

“I do not think this was done by anybody in our school. If you will remember, we were all away to-day to target practice.”

“That is true, but one boy, Robert Grenwood, came back early.”

“I know that, sir, but——”

“And I rather think he was in an ugly frame of mind upon his return,” pursued the master of the school grimly.

“That might be, too, sir. All the same, I don’t think he’d do this. Bob isn’t that kind of a fellow.”

“Well, what were you going to say?”