But, alas, alas! Pride goes before a fall, and the revengeful Snow turned the tables with disastrous success.

No sooner had the guest paid the usual stale compliments and bowed himself out, than Jenny, under pretense of asking an important question, informed Mr.Davis, the teacher, that Amy March had pickled limes in her desk.
Now Mr.Davis had declared limes a contraband article, and solemnly vowed to publicly ferrule the first person who was found breaking the law.

This much-enduring man had succeeded in banishing chewing gum after a long and stormy war, had made a bonfire of the confiscated novels and newspapers, had suppressed a private post office, had forbidden distortions of the face, nicknames, and caricatures, and done all that one man could do to keep half a hundred rebellious girls in order.

Boys are trying enough to human patience, goodness knows, but girls are infinitely more so, especially to nervous gentlemen with tyrannical tempers and no more talent for teaching than Dr.Blimber.
Mr.Davis knew any quantity of Greek, Latin, algebra, and ologies of all sorts so he was called a fine teacher, and manners, morals, feelings, and examples were not considered of any particular importance.

It was a most unfortunate moment for denouncing Amy, and Jenny knew it.