How does the introduction of Chapter 34 connect to the main story about the doctor's nephew?

The introduction of Chapter 34 serves as a direct prelude to the main story. It explicitly states that the chapter continues the narration on the "greatness of Udi" and its qualities. More specifically, the introduction mentions, "A terrible disease like a bone-cyst (Hadyavran) could not be cured by any remedy. Smearing it with the Udi from Sai’s hand completely uprooted the pain." This statement perfectly sets the stage by foreshadowing the exact ailment and cure that form the basis of the chapter's illustrative story about the doctor's nephew from Malegaon, thereby linking the chapter's theme to its primary narrative.