Can you tell me about the group of devotees from Madras mentioned in Chapter 29? What was their story?

Chapter 29 describes a group of devotees from the Madras region (now Chennai) who came to Shirdi for Sai Baba's darshan. This group, consisting of one man and three women (a mother-in-law, wife, and daughter), had spent a year engaged in devotional singing. They were on a larger pilgrimage to Kashi when they decided to stop at Shirdi on their way. As noted in verse 12 of Chapter 29, they belonged to the Ramdasi sect and performed their devotional singing with great enthusiasm. After receiving darshan, they found peace and stayed near Sai for several days, where Baba, pleased with them, gave them eight rupees and eight annas.