Can you tell me about Damu Anna and his devotion to Sai Baba?

Certainly. Damu Anna is introduced in Chapter 25 as a well-to-do person and wealthy bronze-smith (Kasar) from Ahmednagar who was deeply devoted to Sai Baba's feet. His story is presented as an example of Sai's love for His devotees. A significant aspect of his life shared in the text is that he had two wives but remained childless for a long time. It was only after receiving Sai Baba's blessings that he was blessed with sons. His devotion was also expressed through a long-standing vow to provide one of the two large flags used in the annual Ram Navami festival procession in Shirdi.