What is the story of Kakasaheb Dixit's vision of Vitthal in Shirdi?

Kakasaheb Dixit had a profound experience where he received a vision of Lord Vitthal while in meditation after his morning bath. As detailed in Chapter 4, when he later went for Sai Baba's darshan, Baba surprised him by asking, "Vitthal Patil had come, right? Did you meet him?" Baba even advised him to "nail him down and make him steady." The miracle was confirmed later that afternoon when a seller arrived with pictures of Vitthal of Pandharpur. One of the pictures was an exact replica of the form Dixit had seen in his vision, which amazed him. Following this, Dixit purchased the picture and installed it for worship.