Dear Psaveenji,
You are doing a great job in great detail. Shri Nischaladasji was a great person and he wrote a great book. I understand that he was so interested in learning the Advaita Vedanta that he, like the mahaveer Karna of Mahabharata, went to his guru in Kashi, under a pseudonym. He had to reveal his real (vyavaharika) identity, only when his guru offered a brahmin girl to him to marry. His Guru got annoyed, of course, but he did not give him a devastating curse, like Karna's guru gave the one to Karna.
Regards,
Sunil K. Bhattacharjya