Can you summarize the story of how Sai Baba's portrait came to the narrator, as told in Chapter 41?

Chapter 41 recounts a wonderful story about the unexpected arrival of a physical portrait of Sai Baba. The chapter explains that this story is a continuation of a previous one where Sai had promised in a dream to visit for a meal on Holi. The fulfillment of this promise came in the form of the portrait. As detailed in the chapter, a man named Alli Mohammed brought the photo at the exact moment lunch was about to be served, delighting the narrator. Alli Mohammed himself explains how he found the portrait. While in Mumbai, he saw a merchant selling pictures and was immediately drawn to Sai Baba's image, which he purchased and cherished at home before eventually bringing it to the narrator.