The algebra-book she closed, shrinking, knowing he was angered; and at the same instant he grew gentle, seeing her hurt because she did not understand.
But things came slowly to her.

And when she held herself in a grip, seemed so utterly humble before the lesson, it made his blood rouse.
He stormed at her, got ashamed, continued the lesson, and grew furious again, abusing her.

She listened in silence.

Occasionally, very rarely, she defended herself.

Her liquid dark eyes blazed at him.
"You don't give me time to learn it," she said.
"All right," he answered, throwing the book on the table and lighting a cigarette.