“…The evidence from Persepolis can be applied directly only to its administrative remit, which would have included much of Fars (Henkelman 2008a: 110-8), but it is not unreasonable to think that similar officials existed throughout the empire. The misleadingly precise and frequently inaccurate distances cited by Herodotus and Xenophon, for the Susa-Sardis road and the route taken by the army of Cyrus the Younger respectively, might be evidence for this, if, as has often been suggested, they made use of maps, itineraries, or, in Xenophon's case, milestones (Tuplin 1997: 404-9;Rood 2010). Indeed, according to Photius's epitome (ninth century CE), Ctesias provided a "calculation of the staging-posts, and distances in day-journeys and parasangs from Ephesus to Bactra and India" {FGrH 688 F33; trans.…”