It is not that, in the first of these charges, he risks being mistaken; it is that it allows for omissions; or rather, since Thucydides is far too thorough to leave out anything important, it is notable in the relative importance that he attributes to different elements of his account. First, he is concerned only with Greece. If we compare the list of thalassocracies that are treated in Eusebius (Chronicle, pp. 225ff) with the summary given by Thucydides in chapter 13, we notice that unlike Eusebius, Thucydides begins with Corinth but neglects all the thalassocracies included by tradition prior to the seventh century: Lydians, Pelasgians Thracians, Rhodians, Phrygians, Cypriots, Phoenicians, Egyptians, Carians. Of course it was not necessary to include all of these, and much of the evidence seems to have come secondhand from a later time. But the fact that Thucydides deliberately omitted everything that was not Greek is characteristic.