Ctesias, Greek physician and historian of Persia; was present with Artaxerxes Mnemon at the battle of Cunaxa, 401 B.C., and stayed afterwards at the Persian court, where he got the materials for his history, of which only a few fragments are extant.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Csoma de Körös, Alexander * Ctesiphon