Can you provide a summary of the key facts about the devotee Damu Anna as mentioned in the text?

Chapter 25 presents several key facts about Damu Anna. He was a well-to-do bronze-smith from Ahmednagar and a dedicated devotee of Sai Baba. A central element of his story is that he was blessed with sons through Sai's grace, resolving his issue of being childless despite having two wives. His devotion was also expressed through a long-standing vow to provide one of the two large flags for the annual Ram Navami festival procession in Shirdi, a tradition he maintained with great love and devotion over many years.