How did Sai Baba demonstrate his foreknowledge regarding the arrival of the Dhurandhar brothers?

Sai Baba provided a stunning demonstration of his divine omniscience when the Dhurandhar brothers visited Shirdi in April 1912. The account in Chapter 51 explains that even before the brothers arrived, Baba announced to the people in his presence, 'Today many of my court-people are going to come here.' When the Dhurandhar brothers later heard about this, they were completely amazed. They had not informed anyone about their journey to Shirdi, so Baba's foreknowledge was a direct and personal experience of his unparalleled power and glory, confirming his saintly nature to them.