According to Chapter 41, what is the story behind the arrival of Sai Baba's photograph?

Chapter 41 of the Sai Satcharitra recounts the miraculous story of how a specific photograph of Sai Baba arrived at just the right moment. The narrator, Alli Mohammed, tells how he was wandering in Mumbai one day and came across a merchant selling various pictures of saints and holy men. He was particularly drawn to one portrait of Sai Baba, whom he already revered. As described in the chapter, he purchased the picture, took it home, and hung it on his wall, taking daily darshan of it. This story is presented as a divine play, or Leela, and is connected to a previous event where Sai had appeared in a dream promising to come for a meal on Holi, which was the very day the photo was delivered by Alli Mohammed.