How did Sai Baba demonstrate that devotees could see Lord Vitthal right there in Shirdi?

Sai Baba taught that with sufficient faith, divine visions were possible anywhere, making Shirdi itself a holy site. Chapter 4 recounts two key instances of this. Baba promised Das Ganu that if he organized a Name-week with full faith, the form of Vitthal would appear, stating Shirdi was no different from Pandhari. Indeed, Das Ganu was granted a vision of Vitthal. Similarly, after Kakasaheb Dixit had a vision of Vitthal in meditation, Baba confirmed it by asking, "Vitthal Patil had come, right?" The vision was further validated when a seller arrived with a picture that perfectly matched what Dixit had seen, which he then purchased and installed for worship.