Ktes. Pers. 16 (Justin, ii. 5). Ktesias states Darius’ losses to have been 80,000 men. Even if the actual number stated be untrustworthy, it shows that this historian, who would be naturally inclined to minimize them, had reason to regard them as serious.

But, furthermore, it is evident that during Darius’ absence north of the Danube, Cf. H. v. 26. a large number of the Hellespontine cities had seized the opportunity for revolt. Byzantion, Kalchedon, Antandros, and Lamponion were among the number. This caused Darius to return to Asia by way of Sestos. It is inconceivable that these towns should have chosen this time of all others, when a large portion of the levy of the Empire was actually under arms, for insurrection, had they not some reason to believe that it had gone whence it could never return their way. They must have received, either from the Greek colonies on the North Euxine, or, more probably, from the Greeks on the Ister, some tidings of a great disaster.

Even if the Greeks on the Ister were not the authors of such tidings, it is unlikely that reports which came to the towns of the Propontis failed to reach them.

May it not then be that the fictitious element in the report of the discussion on the desertion of Darius, in so far as the general details of the lines which the discussion itself followed are concerned, is confined to the part which Miltiades is alleged to have played in it? It is not necessary on this assumption to further assume the veracity of the tale of the orders given by Darius to the guardians of the bridge. That tale simply served to heighten the colouring of the picture of the treason of those Asiatic Hellenes to Hellenic freedom, in that it robbed them of the excuse of fidelity to a trust imposed upon them.

It is quite possible, then, that some report of disaster did lead to the formation of a plot in which all the tyrants were more or less implicated, but which for some unknown reason never came to a head. If it had been a one-man plot, in which Miltiades had played a solo part, surely his design must have become known to Darius. ORIGIN OF THE LEGEND. And yet on return to Asia Darius passed through Miltiades’ dominions, the only part, apparently, of the Hellespontine region to which the infection of rebellion had not spread. If Miltiades had taken part in the plot, and if any judgment can be formed from the general practice of Persian kings, it can hardly be supposed that he would have lived to fight at Marathon.

It now remains to consider briefly how the extraordinary story of the march beyond the Ister can possibly have originated.

Doubtless the Greeks in the cities on the north coast had many a tale brought to them by the native traders from the interior of the commotion caused by the sudden appearance of this strange army within the Scythian borders.

These tales, probably wild exaggerations even in their original form, would not, it may be certain, lose aught in the course of their evolution. An element common to all of them would be that somewhere in the Hinterland this army had appeared; and it may well be that within a comparatively short period the most easterly of the Greek cities came to regard their own Hinterland as the scene of its operations. This would bring the imaginary march of the army to the neighbourhood of the Don and the Volga.

In actual fact, however, it is impossible to suppose that the most extreme point ever reached by Darius was far north of the Ister. It is in the highest degree improbable that he ever passed the well-defined boundaries set by the Carpathians and the Pruth.

With regard to the motives of the expedition, Herodotus declares that it was intended as a retaliation for the Scythian invasion of Western Asia, which spread desolation through part of the continent, and was about synchronous with, and largely the cause of, the fall of the Assyrian Empire. Apart from the improbability of Darius cherishing resentment for occurrences of such ancient date, or for injuries of which he was in no real sense heir, he was probably aware, though Herodotus was not, that the people who lived to the north of the Euxine were wholly distinct from the Sakæ, whom Herodotus calls Scyths, who had troubled the continent more than a century before this time.