What was Tatya Patil's special role in Sai Baba's Chavadi procession, and what does it tell us about their relationship?

Tatya Patil played an indispensable and intimate role in the Chavadi procession, highlighting a deep, mutual love between him and Sai Baba. According to Chapter 37, Baba would not begin the procession until Tatya arrived. Tatya would then initiate the departure by putting his hand under Baba's arm to help Him stand. He also lovingly placed a beautiful golden-bordered shawl over Baba. During the procession itself, Tatyaba would hold Baba's left hand. Their close bond is further emphasized by the fact that Tatya used to affectionately call Baba 'Mama' (uncle), a detail for which the text says there is no comparison to describe their close relationship.