What happened to the Patil in his dreams as described in Chapter 13, and what was the result when he woke up?

Chapter 13 details two strange dreams experienced by the Patil. In the first, a teacher was punishing a student with a cane. In the second, more terrifying dream, a gentleman sat on his chest and used it as a mortar with a grinding stone, causing him extreme agony. Despite the horrifying nature of these dreams, the chapter explains that when the Patil woke up, he felt an unprecedented freshness. The disease that had been troubling him had completely vanished, and he was filled with a sense of relief and felt as if he had been reborn.