Could you describe the group of pilgrims from Madras mentioned in Chapter 29?

Chapter 29 details the visit of a group of devotees from the Madras region, now known as Chennai. These pilgrims, who had gained fame for their devotional singing, were on a larger pilgrimage to Kashi and made a stop in Shirdi to have Sai Baba's darshan. The text notes in verse 12 that they belonged to the Ramdasi sect and performed their devotional singing with great enthusiasm. After taking darshan and attaining peace, they stayed near Sai for several days. In response to their devotion, Baba was pleased and gave them a gift of eight rupees and eight annas.