“And if you upset me again, you’ll go to an early grave,” declared the big lad, as the five strolled off to recuperate after the arduous labors of the day.

When Tom and his chums filed into Latin recitation the next morning, there was a feeling of expectancy on all sides, for the word had gone around that there might be “something doing” in regard to the professor who had come to temporarily fill the place of “Pitchfork.”

No one had seen him, as yet, but his probable name of “Harold Archibald,” had been bandied about until it was felt sure that it was an index to his character and build. Judge then, of the surprise of the lads, when they found awaiting them a tall man of dark complexion, with a wealth of dark hair, and a face like that of some football player. He was muscular to a degree. There was a gasp of distinct surprise, and several lads who had come “not prepared” began to dip surreptitiously into their Latin books, while others, who had contemplated various and sundry tricks, at once gave them over.

“Good morning, gentlemen,” began Professor H. A. Broadkins, in a deep, but not unpleasant voice. (It developed later that his name was Hannibal Achilles.) “I am sorry your regular teacher is not here, but I will do the best I can. You will recite in the usual way.”

Thereupon, much to the surprise of the boys, he began giving them a little history of the particular lesson for the day, roughly sketching the events which led up to the happenings, and giving reasons for them. It was much more interesting than when “Pitchfork” had the class and the boys did their best.

But Dutch Housenlager had to have his joke.

The lesson had to do with some of the Roman conquests, and, in order to illustrate how a certain battle was fought the professor, by means of books constructed a sort of model walled city. The besiegers were represented by more books, outside the walls.

“This was one of the first battles in which the catapult was used,” went on the instructor. “You can imagine the surprise of the besieged army when the Romans wheeled this great engine of war close to the walls, and began hurling great stones. In a measure the catapult served to cover the attack on another part of the city.

“For instance we will make a sort of catapult by means of this ruler. This piece of mineral will do for the stone, and er—I think I will ask one of you young men to assist me—er—you,” and he pointed to Dutch. “Just come here, and you may work the catapult when I give the word. I want to show the class how the other division of the army sapped the walls.”