What was the history of the specific portrait of Sai Baba shown to Kakasaheb Dixit, and why was it at Mirikar's house?

The portrait held special significance as it was previously worshipped with great devotion by Megha, who regarded it as Lord Shankar himself. As Chapter 51 explains, the portrait was at Mirikar's house because it had been damaged. The text states, "Since the glass had broken, it had been sent from Shirdi with Balasaheb to Nagar for repairs." After the repairs were completed, the portrait was kept covered in Mirikar's drawing room. Its presence was a fortunate coincidence, as if it was waiting there specifically for Dixit, who was about to embark on his journey to see the very Guru depicted in the image.