A Letter From Home, for Me?

"I am doing," Prescovia began suddenly and reluctantly. "What sort of work? I am thinking," he answered seriously after a pause. Nastasya was overcome with a fit of laughter. She was given to laughter, and when anything amused her, she laughed inaudibly,. quivering and shaking all over till she felt ill. And have you made much money by your thinking?" she managed to articulate at last.