What was the significance of Balaram Mankar's sudden coughing fit after he had been cured?

After Balaram was miraculously cured of his six-year-long asthma by taking a puff of Sai Baba's chillim, he remained in perfect health. However, Chapter 51 recounts a peculiar incident where he experienced a sudden and surprising fit of coughing one day. The amazement of those around him turned to understanding upon later inquiry. It was discovered that this coughing fit occurred on the very same day that Sai Baba gave up His physical body. This event was interpreted as a final, personal sign from Baba to his devoted follower, and after that moment, Balaram never suffered from a cough again for the rest of his life.