Can you tell me about the man whose rheumatism was treated by Sai Baba in a very unusual way?

Chapter 22 narrates the story of Amir Shakkar, who suffered from rheumatism and prayed to Sai Baba for deliverance. Baba's remedy was for him to reside in the dilapidated Chavadi. Despite the building being old, damp, and full of creatures, Amir accepted Baba's word as medicine and stayed there for nine months. The text highlights his internal faith despite the externally contrary conditions, noting that this stay, while feeling like imprisonment, was also a form of firm companionship with Sai, which is a rare benefit to receive.