What does Chapter 34 say about the power of Udi in contrast to other remedies?

Chapter 34 of the Shri Sai Satcharitra uses the story of the boy with the bone-cyst to powerfully illustrate the glory of Udi. The narrative emphasizes that a "terrible disease" which could not be cured by any other remedy was completely healed by Sai's Udi. It details how all native and foreign treatments, the expertise of intelligent surgeons, and even direct surgery had failed. In stark contrast, Sai Baba's remedy was simply to provide Udi and instruct the parents to smear it on the wound. This highlights the central theme that the Udi's power, derived from Baba's grace, transcends the limits of conventional medical science.