Siyar al-mutaʾakhkhirin 18.1.3

18.1.3

Arrived in Iran, he attended to the lessons of the masters of that country, until he became himself a complete proficient in the whole circle of Sciences, especially in the speculative ones; such as Astronomy, Mathematics, and Algebra. So that become himself now a man of character and renown, he passed his days in Iran, in honor and affluence. He afterwards came to Cabul, where he was employed as Second, in carrying messages to the Iranian Governors and Grandees of that frontier, as that employment had been lately declined by Mir-ghulam-mahmed the Mehadian, a man of great eminence, and incomparable learning, who had been hitherto employed in those negotiations, and had more than once served the famous Emir-qhan, as a mediator in his differents with the neighbouring powers. Moluvy-nassyr, after a long stay in that country, returned to India; and having obtained from the Emperor a small Djaghir or freehold in the province of Bahar, his native country, he settled at Azim-abad, where the house he has raised is still standing, and was, according to his will, left to his grandson, Mahmed-hassen-qhan, who inhabits the same to this day. The second of those eminent men was Daud-aaly-qhan, better known under the name of Zair-hossein-qhan. He was the eldest son of Moluvy-nassyr; equal to him in the practical sciences, which he had learned from him; and superior to him in the spiritual ones, which he held only from himself.