What future topics does Hemadpant preview at the end of Chapter 5, and who is credited with providing some of the chapter's information?

Towards the conclusion of Chapter 5, the author Hemadpant builds anticipation by previewing several profound narratives for upcoming chapters. He mentions that he will describe the former state of the mosque, the difficulties in paving its floor, and the mystery of Sai Baba's lineage—whether he was of Hindu or Muslim origin. He also hints at stories of Baba taking on his devotees' sufferings, evidenced by his performing Khanda-yoga, washing clothes, and grinding. For the specific story about the Guru-disciple conduct between Sai and Devidas, the chapter credits Mahalsapati, a great devotee of Sainath, for making it known exactly as it happened.