What were the two dreams the Patil experienced in Chapter 13, and what was their immediate physical and mental effect upon him when he woke up?

Chapter 13 recounts two bizarre dreams experienced by the ailing Patil. In the first, a teacher troubled him greatly, breaking his back with a cane just to make him memorize a verse. Immediately after, he had a second, even stranger dream where a gentleman sat on his chest and used a grinding stone to make a mortar of it, causing him immense agony. However, when the dream ended and the sun rose, the Patil woke up to a miraculous transformation. He felt an 'unprecedented freshness in his mind,' and the 'idea of disease vanished completely.' The marks of the cane or stone were nowhere to be seen. This sudden relief from sorrow and disease made the Patil feel as though he had been reborn, filling him with satisfaction and joy.