But Tom was wise in his day. It was not the first time he had matched his wits against some unfair instructor, and he at once resolved on his plan.

He had printed the threatening letter in the usual, straight up and down characters. As he now began to print out the Latin exercise he used, in part, letters that sloped forward, and others that sloped backward. Not once did Tom use an upright character.

“There,” he thought, as he neared the end of the short exercise, “if he thinks he can compare any of the words in this, with the words in the letter I handed him on the end of the stick, he’s a good one.”

Tom noticed, as did some of the others, that the words in the exercise were, in many cases, the same ones used in the letter. The professor had been enough of a detective to think of this, and he chuckled to himself many times as he thought of his cuteness. But it was not to avail him.

“You may hand in your papers as you finish,” he said, “and leave the room. Don’t forget—to-day’s lessons, and two additional ones for to-morrow.”

One by one boys filed up to his desk, laid their papers down, and passed out.

“Humph!” exclaimed Professor Skeel, as Tom passed over his exercise. “Is this your usual style of printing, Fairfield?”

“I am not used to such work, and I have no decided style. I vary it, I suppose, not having had much practice at it.”

“So I see,” remarked Professor Skeel, with a sharp glance at our hero—a glance that Tom returned unabashed.