Could you tell me the story from Chapter 34 about the doctor from Malegaon and his nephew?

Certainly. Chapter 34 narrates the story of a degree-holding doctor in Malegaon whose young nephew was afflicted with a painful and incurable bone-cyst. The doctor, along with his physician friends and even skilled surgeons, tried every available native and foreign treatment, but all their efforts were in vain, leaving them exhausted and helpless. After even prayers to family deities brought no relief, the family heard of the great saint Sai Baba in Shirdi, who could heal diseases with his grace. Seeing it as their last hope, the boy's parents traveled to Shirdi. They prostrated at Baba's feet, tearfully described their son's suffering, and pleaded for his life. The compassionate Sai Baba reassured them, told them to be worry-free, and gave them Udi to apply to the wound.