What remedy did Sai Baba prescribe for Amir Shakkar's rheumatism, and what were the conditions he had to endure?

As recounted in Chapter 22, when Amir Shakkar approached Sai Baba suffering from severe rheumatism, Baba's prescribed remedy was not a medicine but a command: he was to stay steadily in the Chavadi. This was a difficult test, as the Chavadi was an old, dilapidated, and filthy place. It was described as having garbage, numerous knee-deep holes, dampness, and being home to lizards, scorpions, and lepers. Despite the wind, rain, and cold, Amir was told to accept these harsh conditions, with Baba's word being the only true medicine for his ailment.