Can you describe the experience Kakasaheb Dixit had involving a vision of Vitthal and how Sai Baba confirmed it?

According to Chapter 4, Kakasaheb Dixit had a vision of Lord Vitthal during his morning meditation. When he later went for Sai Baba's darshan, Baba cryptically asked him, "Vitthal Patil had come, right? Did you meet him?" and advised him to "nail him down and make him steady" because the vision could be fleeting. The experience was further validated that afternoon when a seller arrived with twenty-five pictures of Vitthal. One of the pictures was an exact replica of the form Dixit had seen in his meditation. Amazed, Dixit remembered Baba's words and purchased the picture to install for worship, providing a clear proof of Baba's omniscience and the reality of the vision.