What was the remedy Sai Baba prescribed for Amir Shakkar's rheumatism, and what was his experience?

When Amir Shakkar narrated his illness of rheumatism to Sai Baba, he was given a seemingly strange remedy. As described in Chapter 22, Baba's instruction was for Amir to stay steadily in the Chavadi. This was despite the Chavadi being old, dilapidated, damp, and filled with creatures, which seemed entirely contrary to treating rheumatism. Baba's medicine was simply His word, and he firmly told Amir not to question the conditions. Amir accepted this, and with internal faith, he stayed in the Chavadi for nine months. The text notes that while externally all conditions were contrary, his internal faith ensured everything went well, framing this difficult stay as his prescribed cure.