Beyond changing the grapes, how did Sai Baba demonstrate his omniscience during Boss Dharamsee's visit?

Sai Baba demonstrated his omniscience, or mind-reading ability, in multiple ways during this encounter. Chapter 35 details how Baba was acutely aware of Dharamsee's inner thoughts. When Dharamsee silently expressed his dislike for the grapes, Baba responded by giving him even more. Later, after the miracle of the seedless grapes, Dharamsee silently tested Baba, thinking, 'If you are a saint, then the next ones will be given to Kaka.' Immediately, Baba, who had been distributing to many people, gave the very next handful of grapes to Kaka. This clear demonstration of mind-reading was what fully convinced Dharamsee that Sai was a true saint.