(b) ‘Life of Hiuen Tsang’ is a book authored by Hui Li. ‘The Natural History’ and ‘Historical Philippical’ are the works of Pompeius Trogus .He was the Roman historian whose work, though not completely preserved, is important for Hellenistic studies. One of the masterpieces of classical literature,the ‘Histories’ is the core work of Herodotus.