Who was Madhavrao Balwant Deshpande and how did his relationship with Sai Baba develop?

Madhavrao Balwant Deshpande was a schoolmaster in a Marathi school located in a small house next to the Masjid. Chapter 0 explains that he began to develop a close relationship with Maharaj by visiting the Masjid frequently. During these visits, he would fill the chillum, smoke it himself, and also give it to Maharaj. This regular interaction fostered a bond, and Maharaj started to attract Madhavrao's mind. Eventually, Madhavrao left all his other businesses to dedicate himself entirely to serving Maharaj and his devotees, never asking for any compensation. He became such a trusted figure that many devotees would not take a step forward without his advice.