Based on the introduction to Chapter 53, what was the unfulfilled promise made in a previous chapter, and why wasn't it kept by the original author?

As explained at the beginning of Chapter 53, a promise was made in the previous chapter to "first look back (review), then provide the summary, and thus complete the book." This promise was made by the original author, Panta Hemad (Dabholkar). However, this summary was not written by him. The chapter clarifies that this wasn't due to forgetfulness but because "Hemad suddenly passed away, leaving everyone’s heart grieved." The text notes this as an exception to the general rule of an author completing their own book, emphasizing that this outcome was ultimately due to Baba's more powerful will.