||It was in thecourt of Serfoji II and his son Sivaji II that the four
brothers - Chinnaiah, Ponnaiah, Sivanandam and Vadivelu - popularly
known as the Thanjavur Quartet, and credited with laying the foundation
of dance, which later took the form of Bharatanatyam, were employed. A
letter written in Modi script (Marathi written in the Modi script) by
Sivanandam reveals that they were well-versed in Hindustani tradition
too. During the reign of Sivaji II, when the palace officials denied
them audience with the king, Sivanandam nattuvanar chose to represent
their grievances in a letter to the King, whom they addressed as Huzoor.
Sivanandam wrote, "as directed, we were teaching the Dasis of the town
both Hindustani and Karnataka dance (Bharatanatyam)."
('Thanjavur emerged as a thriving cultural capital under the Marathas' by Kombai S Anwar, The Hindu, April 27, 2018)