Documents of Marathi history dating to the eighteenth and nineteenth century presented to the Royal Asiatic Society by Sir Alexander Malet in 1828 and by General John Briggs in 1874. The papers donated by Briggs are predominantly correspondence from the Peshwa Court at the time of Nana Fadnavis and were given by Nana Fadnavis' widow to Briggs in 1825. Those from Malet were collected by his father, Sir Charles Warre Malet, during his political career in India and are predominantly handwritten accounts of Marathi history.

Each of the documents also has a description provided by Simon Digby when Honorary Librarian at the Royal Asiatic Society from 1970. The documents written in Marathi are in modi script.

Documents of the Maratha Peshwa Court given to John Briggs by the widow of Nana Fadnavis. This includes original correspondence to Madhu Rao and Nana Fadnavis. The letters commence with the public life of Nana Fadnavis in 1761 and end with his fall in power in 1796 and are associated with the reign of Madhu Rao.