Based on the events in Shirdi, how was Sai Baba's guidance conveyed to Damu Anna to prevent his financial venture?

Sai Baba's guidance was conveyed through a multi-step process initiated by Damu Anna's letter. As detailed in Chapter 25, Damu Anna wrote seeking permission for a business deal. The letter was brought to Baba by Madhavrao Shama. Baba, after listening to the letter, provided a firm and direct verbal reply for Shama to send back. The core of this guidance was a warning against ambition: "The Shet's mind has gone astray! ... Half a loaf of bread is enough for us; do not fall into the trap of millions." This response, though it caused Damu Anna great disappointment, successfully halted his plans and protected him from the potential ruin of chasing millions.