What is the primary narrative used in Chapter 34 of the Shri Sai Satcharitra to demonstrate the power of Udi?

Chapter 34 continues the theme of the glory of Udi by narrating a specific, experience-based story. It details the case of a doctor's nephew from Malegaon who suffered from a severe and incurable bone-cyst, referred to as Hadyavran. The chapter explains that numerous physicians, expert surgeons, and all available native and foreign treatments failed to provide any relief. As a last resort, the boy's desperate parents traveled to Shirdi. After they pleaded with Sai Baba, he, as the embodiment of compassion, reassured them and instructed them to apply his Udi to the wound, showcasing its miraculous healing properties as described in Chapter 34.