What does the preface say about the structure of Shri Sai Satcharita and the completion of its chapters?

According to the preface in Chapter 0, the book's structure has an interesting history. The author, Annasaheb, had written the 52nd chapter on slips of paper, but the summary and conclusion verses were unfortunately lost. To ensure the book was complete, a new concluding chapter was prepared and added as the 53rd chapter. This chapter mentions that the entire work contains about 150 to 175 stories, sub-stories, and anecdotes, providing a comprehensive overview of Sai Baba's life and teachings.