1. Duff, J. C. G., A History of the Mahrattas Vol. 1, 50 (Murray, London, 1826).
2. Char les, C. D. Science 277, 925–928 (1997).
3. Beatson, A. Tracts on the Island of St Helena, 10 (Black, London, 1816).
4. Roxburgh, W. Phil. Trans. R. Soc. 68, 180–190 (1778); 80, 112-113(1790).
5. Roxburgh, W. MS Report to the President's Council Dated 6 February, in East India Company Boards Collections, ref. no. F/4/99 (British Library India Office Library and Records, London, 1793).