Who was the devotee that had a vision of Vitthal and was later questioned about 'Vitthal Patil' by Sai Baba?

This devotee was Kakasaheb Dixit. Chapter 4 recounts that after his morning bath, Kakasaheb sat in meditation and received a vision of Vitthal. When he later went for Sai Baba's darshan, Baba surprised him by asking, "Vitthal Patil had come, right? Did you meet him?" This cryptic question was followed by a remarkable event that afternoon when a seller arrived with pictures of Vitthal of Pandharpur. Kakasaheb was astonished to see that one of the pictures was an exact replication of the form he had seen in his vision, confirming the morning's experience.