Could you recount the story of how Sai Baba's portrait was acquired and delivered by Alli Mohammed, as narrated in Chapter 41?

Certainly. In Chapter 41, Alli Mohammed tells his own story of how he came to possess the portrait. He explains that while wandering the streets of Mumbai, he saw a merchant selling various pictures of saints and holy men. Among them, one portrait of Sai Baba particularly appealed to his heart, as Sai was already his worshipped deity. He purchased the picture, took it home, and hung it on his wall for daily Darshan. The miracle, as described in Chapter 41, is that Alli Mohammed arrived with this very portrait at the author's house at the exact peak moment they were about to sit for lunch on Holi day, thus fulfilling Sai's words from a dream in an unexpected way.