Does Chapter 25 actually narrate the miracle associated with Damu Anna's cotton trade?

No, the text of Chapter 25 does not narrate the full details of the miracle related to Damu Anna's cotton trade. Instead, this chapter serves as an introduction to his story. It establishes the premise that Sai Baba grants the desires and removes the suffering of his faithful devotees. It then introduces Damu Anna as a wealthy devotee from Ahmednagar and promises to tell a story that demonstrates Sai's love and mercy. The chapter concludes by setting the stage for his story, but the specific events of the cotton trade are not described within these passages.