According to Chapter 41, how did Alli Mohammed come to possess the photograph of Sai Baba?

The story of how Alli Mohammed acquired the portrait is recounted directly in Chapter 41. He explains that one day, while wandering the streets in Mumbai, he came across a merchant selling various beautiful pictures of saints, sages, and holy men. As he looked through the collection, one particular portrait of Sai Baba appealed deeply to his heart, its attractiveness surpassing all the others. As Sai was already his worshipped deity, he felt an immediate eagerness to have the picture. Alli Mohammed paid the price in cash, brought the portrait home, and hung it on his wall for daily darshan, for which he had great love. This account from Chapter 41 sets the stage for how the photo eventually reached the narrator on Holi.