Can you tell me the story behind the Baba portrait that Kakasaheb Dixit saw at Mirikar's house?

The portrait shown to Kakasaheb Dixit had a special history. According to Chapter 51, this photograph of Baba was originally worshipped with great devotion by Megha, who regarded it as Lord Shankar. The glass on the portrait had broken, so it was sent from Shirdi with Balasaheb to Nagar to be repaired. After the repairs were complete, the portrait was kept covered in Mirikar’s drawing room. It was entrusted to Madhavrao to be taken back to Shirdi, and its unveiling for Dixit, who happened to be there at that exact time, was seen as a wonderful and strange coincidence that brought him immense joy.