The illustration is of Natho Ji, Raj Vyas (the chief adviser) of the king of Jodhpur between 1613-1640. He was the adviser for three kings (Raja):
Sawai Raja Soor Singh Ji,Maharaja Gaj Singh Ji,
Maharaja Jaswant Singh Ji.Amar Niwas was the house of his son.
Shree Natho Ji was the forefather of Mr. Amar,
who is the owner's (sunil's) grandfather.