the Persians encamped on it. There are marshes at each end, which are dry in spring and summer, and then offer no obstruction to the horseman, but are commonly flooded with rain and so rendered impracticable for cavalry in the autumn, the time of year at which the action took place.
The Greeks, lying encamped on the mountains, could watch every movement of the Persians on the plain below, while they were enabled completely to mask their own. Miltiades also had from his position, the power of giving battle whenever he pleased, or of delaying it at his discretion, unless Datis were to attempt the perilous operation of storming the heights.
If we turn to the map of the old world, to test the comparative territorial resources of the two states whose armies were now about to come into conflict, the immense preponderance of the material power of the Persian king over that of the Athenian republic, is more striking than any similar contrast which history can supply. It has been truly remarked, that, in estimating mere areas, Attica, containing on its whole surface only seven-hundred square miles, shrinks into insignificance if compared with many a baronial fief of the middle ages, or many a colonial allotment of modern times. Its antagonist, the Persian empire, comprised the whole of modern