[284] Herod. 5, 12, 23, 25. The chronology which Herodotus thus gives to the campaign of Otanes, representing it as subsequent to that of Megabyzus, is impossible. He himself represents Otanes as nominated general of the forces on sea, and only subsequently as a successor of Megabyzus. The subjugation of the cities belongs to his first command. [285] Herod. 6, 40, 84. [286] It is self-evident that Miltiades did not wait for the arrival of Darius on the Danube. [287] According to Polyaenus, Chalcedon was taken by a mine, which was carried from a hill 15 stades from the city under the market-place. "Strateg." 7, 2, 5. It is obvious that we must read [Greek: Kalchêdôn] here, and not [Greek: Karchêdôn]. The altar of Zeus Diabaterius which, according to Ctesias, Darius erects, and the Chalcedonians subsequently pull down, is certainly identical with the two monuments which, according to Herodotus, Darius set up at Byzantium (above, p. 269). Herodotus also speaks of the destruction of the monuments, but ascribes it to the Byzantines. This was done obviously in the time after the battle of Mycale; if previously destroyed they would have been restored by Megabyzus and Otanes when they subjugated the Hellespont. Of the later destruction Herodotus relates that the Byzantines conveyed the stones into the city, and used them in building the altar of Artemis Orthosia; one stone only, covered with Assyrian letters, was left at the temple of Dionysus: Herod. 4, 87. CHAPTER XVI. THE CONQUESTS IN AFRICA AND EUROPE.