Why did Das Ganu start writing his commentary on the Ishavasya Upanishad, and what was Sai Baba's strange advice when he got stuck?

Das Ganu began writing the "Ishavasya-Bhavartha-Bodhini" with a specific desire in mind: to explain the meaning of the Ishavasya Upanishad through simple Ovi verses for people who were ignorant of the Sanskrit language. As Chapter 20 explains, when he hit a block and could not understand the Upanishad's deeper meaning, he traveled to Shirdi to consult Sai Baba. Baba's advice was quite unconventional. He told Das Ganu, "The resolution of this doubt of yours will be done by the maidservant at Kaka’s house When you return there."