What were the specific roles of Tatya Patil and the horse Shyam-Sundar during the Chavadi procession?

In the detailed account of the Chavadi procession found in Chapter 51, both Tatya Patil and the horse Shyam-Sundar had distinct roles. The horse, also named Shyam-Sundar, was beautifully decorated with a gold-embroidered cloth and ornaments, and it would dance at the very front of the procession. Tatya Patil played a close personal role, walking on Baba's left side and holding a lantern to light the way. This is contrasted with another devotee who would hold the end of Baba's cloth on His right side, highlighting the intimate and organized nature of the procession.