What is the story of Alli Mohammed and the portrait of Sai Baba as told in Chapter 41?

According to Chapter 41 of the Sai Satcharitra, the story of Alli Mohammed and the portrait is quite miraculous. Alli Mohammed recounts how he was wandering the streets of Mumbai when he came across a merchant selling pictures of saints and holy men. As described in this chapter, he was immediately drawn to one particular portrait of Sai Baba, whom he already worshipped. He bought the picture, took it home, and hung it on his wall for daily darshan. The narrative then explains that it was this same Alli Mohammed who brought the portrait to the narrator's house on a Holi festival day, arriving at the exact moment they were about to have lunch, which made the narrator delighted.