What is the story behind the portrait of Sai Baba that was present when Dixit's travel plans were being made?

The portrait of Sai Baba played a significant role in the events at Mirikar's house. According to Chapter 51, this specific photograph was once owned by Megha, a devoted disciple who worshipped it with great love as if it were Lord Shankar. The glass on the portrait had broken, and it was sent from Shirdi with Balasaheb to Nagar for repairs. After being fixed, it was kept covered in Mirikar’s drawing room, as if waiting for Dixit. After the plan was settled for Dixit and Madhavrao to travel by the ten o'clock train, Balasaheb unveiled the portrait. Since Balasaheb had to stay behind, he entrusted the sacred portrait to Madhavrao to take back with him.