Can you summarize the introduction to the story about the man from Nashik mentioned in Chapter 12?

Certainly. Chapter 12 introduces an upcoming narrative it calls a "very delightful story" that illustrates the greatness of the Guru. The story features a man from the holy city of Nashik, who is described as a "ritualistic, orthodox Agnihotri" with the surname 'Mule'. According to the chapter, he came to Shirdi due to the "strength of his past merits," as the text posits that without such merit, one cannot stay in Shirdi even for a moment. It is also mentioned that his initial intention for the visit was different from what transpired, but a fortunate coincidence led him to gain the benefit of Shirdi and have a rare meeting with his own Guru.