What specific story is introduced in Chapter 25, and for what purpose is it told?

Chapter 25 introduces the story of a devotee named Damu Anna, who is described as a wealthy Kasar (bronze-smith) from Ahmednagar. His story, which involves the cotton trade, is presented as a clear example of Sai Baba's love for His followers. The stated purpose of narrating this account is to show how Sai Baba "wards off all the misfortunes" of a devotee once one-pointed faith is established, granting them their desired objects. The chapter promises that by listening to this "novel story," the reader's mind will understand how the "Guru-Mother is an 'Ocean of Mercy'" and that their own difficulties will vanish.