According to the text, what specific events preceded Sai Baba's final departure as described in Chapter 43?

Chapter 43 provides a concise review and continuation of the events surrounding Sai Baba's Mahasamadhi. The chapter explains that as his end approached, Baba demonstrated his religious awareness. It specifically mentions that he listened to the Ramayana for his own benefit, recited by a Brahmin. The narrative in Chapter 43 also promises to detail how the planning for his Samadhi tomb occurred and how a mysterious event, referred to as the unseen 'fall of the brick,' was connected to the selection of the Samadhi's location. This chapter builds upon the previous one, which had already described the donation made to Lakshmi.