What was the mystery surrounding the Tanga that brought Ramgir to Nana Chandorkar?

The story of the Tanga is presented as a miraculous event. In Chapter 33, when Ramgir arrived, he asked Nana Chandorkar about the Tangawala who had brought him. However, Nana was completely perplexed, stating, "I didn't send any. Where is the question of a Tanga for me? Who knows you were coming?" This revealed that Nana had no knowledge of the Tanga's arrangement. The narrative explains that the appearance of both the Tanga and a Sipahi was an act of the "motherly Sai," who is described as a skilled actor that comes running to the aid of devotees during a crisis, demonstrating Baba's protective affection.