The Datang xiyu ji T 2087.51.867-947; A travel record by Xuanzang 玄奘， of his seventeen-year long trip to India， where he went to study and gather Buddhist scriptures. Written in 646 at the behest of the Emperor， Xuanzang's his journey through over 138 states in Central Asia and India， remains one of our most valuable records of those regions in the seventh century. Includes abundant material on customs， Buddhist legends， population， etc. 'Great T'ang' signifies the T'ang Dynasty， and in a broader sense China. English translation by Beal.