What details does Chapter 51 provide about the forthcoming story of Kakasaheb in Shirdi?

Chapter 51 sets the stage for a detailed account of Kakasaheb's origins in Shirdi. The author explicitly states an intention to narrate the "marvelous account of how Kakasaheb was established in Shirdi." This story is presented as significant because, while many of his other tales were widely known, the specifics of his first arrival and connection were not. The chapter attributes this connection to a "bond of past lives (rinanubandh) with Shirdi" and a firm relationship with Sai. As Chapter 51 explains, meeting a Sadguru is a result of the Supreme Lord's grace, earned through the merits of past lives, which strengthens a disciple's bliss.