The Chhatrapati's rump raj: after the Third Anglo-Maratha War destroyed the Peshwa's dominions in 1818, the British freed Shivaji's titular descendant from Peshwa control and handed him a principality around Satara, which they resumed in 1848 when the last raja died without a natural heir.
Annexed to British India (Bombay Presidency) under the Doctrine of Lapse after Shahaji III died heirless in 1848.
Published archival selections from the Satara court's own diaries - the primary record of the raj itself, not a general Maratha survey.
Marathi biography of Pratapsinh, the raja installed at Satara in 1818 and deposed by the British in 1839 - the central figure of this polity.