There are some that from Cecrops to Alexander of Macedon reckon a thousand eight hundred and twenty-eight years; and from Demophon, a thousand two hundred and fifty; and from the taking of Troy to the expedition of the Heraclidæ, a hundred and twenty or a hundred and eighty years. From this to the archonship of Evænetus at Athens, in whose time Alexander is said to have marched into Asia, according to Phanias, are seven hundred and fifty years; according to Ephorus, seven hundred and thirty-five; according to Timæus and Clitarchus, eight hundred and twenty; according to Eratosthenes, seven hundred and seventy-four. As also Duris, from the taking of Troy to the march of Alexander into Asia, a thousand years; and from that to the archonship of Hegesias, in whose time Alexander died, eleven years. From this date to the reign of Germanicus Claudius Cæsar, three hundred and sixty-five years. From which time the years summed up to the death of Commodus are manifest.