What is the backstory of the Sai Baba photograph that Dixit Kaka encountered before his trip to Shirdi?

The photograph had a significant history, as detailed in Chapter 51. It was originally in Shirdi and was ardently worshipped by Megha, a devoted disciple who regarded the image as Lord Shankar himself. At some point, the glass covering the photograph broke. Consequently, the portrait was sent from Shirdi to Nagar with Balasaheb Mirikar for the purpose of getting it repaired. After the repairs were completed, the portrait was kept covered in Mirikar's drawing room. The narrative suggests it was as if the portrait was waiting there specifically for Dixit Kaka's arrival, providing him with Baba's darshan even before he reached Shirdi.