How did Sai Baba demonstrate his omniscience to the Dhurandhar brothers on their first visit to Shirdi?

Sai Baba showcased his divine foreknowledge to the Dhurandhar brothers during their visit in April 1912. The account in Chapter 51 states 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.' The Dhurandhar brothers were completely amazed when they heard about this upon their arrival. They had not told anyone about their travel plans to Shirdi, so Baba's prior knowledge of their coming was a powerful and sweet experience that confirmed his saintly nature and left them filled with joy and satisfaction.