The Rainbow by D H Lawrence Chapter 13 Page 125

Ursula stood and listened, her heart hard and cold. She was so much upset, that she felt almost mad. Something in her tempted her to turn on the headmaster and tell him to stop, about the miserable pens. But she did not. She could not.

After every session, morning and evening, she had the pens counted. Still they were missing. And pencils and india-rubbers disappeared. She kept the class staying behind, till the things were found. But as soon as Mr. Harby had gone out of the room, the boys began to jump about and shout, and at last they bolted in a body from the school.

This was drawing near a crisis. She could not tell Mr. Harby because, while he would punish the class, he would make her the cause of the punishment, and her class would pay her back with disobedience and derision.