Can you describe the group of devotees from Madras mentioned in Chapter 29?

Certainly. Chapter 29 describes a group of devotees from the Madras (now Chennai) region who came to Shirdi for Sai Baba's darshan. This group of travelers belonged to the Ramdasi sect and had spent the year engaged in devotional singing. They had heard of Baba's fame as a great saint who was patient, generous, and compassionate, which prompted them to stop at Shirdi on their way to a pilgrimage in Kashi. According to the account in Chapter 29, after taking darshan of Sai, they attained peace and stayed near him, performing loving devotional singing regularly. The text also mentions that Baba gave them eight rupees and eight annas, which pleased their minds.