Tell me about the group of devotees from Madras mentioned in this chapter.

Chapter 29 describes a group of devotees from the Madras region (now Chennai) who came for Sai Baba's darshan. This group, which consisted of four people—a man with his mother-in-law, wife, and daughter—was on a pilgrimage to Kashi and stopped at Shirdi along the way. They were known for their devotional singing and belonged to the Ramdasi sect. The text mentions that they stayed near Sai for several days, performing loving devotional singing, and that Baba, pleased with them, gave them eight rupees and eight annas.