After doing this, Datis sailed with his army against Eretria first, taking with him Ionians and Aeolians; and after he had put out from there, Delos was shaken by an earthquake, the first and last, as the Delians say, before my time. This portent was sent by heaven, as I suppose, to be an omen of the ills that were coming on the world. For in three generations, that is, in the time of Darius son of Hystaspes and Xerxes son of Darius and Artaxerxes son of Xerxes, more ills happened to Hellas than in twenty generations before Darius; some coming from the Persians, some from the wars for preeminence among the chief of the nations themselves. Thus it was no marvel that there should be an earthquake in Delos when there had been none before. Also there was an oracle concerning Delos, where it was written: I will shake Delos, though unshaken before. In the Greek language these names have the following meanings: Darius is the Doer, Xerxes the Warrior, Artaxerxes the Great Warrior. The Greeks would rightly call the kings thus in their language.