Who was the leader of the Santhal Revolt (1855-56)?

NCERT (2026-27): “2.2 The Santhals: Pioneer settlers … By the 1850s, the Santhals felt that the time had come to rebel against zamindars, moneylenders and the colonial state, in order to create an ideal world for themselves where they would rule. It was after the Santhal Revolt (1855-56 ) that the Santhal Pargana was created, carving out 5,500 square miles from the districts of Bhagalpur and Birbhum. The colonial state hoped that by creating a new territory for the Santhals and imposing some special laws within it, the Santhals could be conciliated.”