What was the specific advice given to Ratanji to overcome his deep-seated sorrow, and by whom?

Ratanji, who was always sad and found that "food and drink did not taste sweet" due to his worry over not having a son, confided in Das Ganu. As detailed in Chapter 14, Das Ganu provided very specific counsel. He advised Ratanji to travel to Shirdi and seek the help of Sai Baba. Ganu's instructions were to "take Baba's darshan, bow at His feet, and tell Him your secret from beginning to end." He assured Ratanji that Baba's "handiwork is inconceivable" and that if he surrendered to Baba alone, he would be fulfilled and receive words of blessing. This advice prompted Ratanji to make a resolution and travel to Shirdi.