Codrus, the last king of Athens, was succeeded during three centuries by archons for life, chosen from his family. Seven archons afterward reigned successively ten years each, and the government was then intrusted to a commission of nine, annually elected. The people demanding written laws, Draco prepared a code of inhuman severity. A more moderate constitution was framed by Solon, one of the Seven Wise Men of Greece; but the contention of the three rival factions of the _Plain_, the _Shore_, and the _Mountain_ soon resulted in the subjection of Athens to the tyranny of Pisistratus. Twice expelled, Pisistratus twice re-established his power, and by his justice and liberal encouragement of all the arts, consoled the people for his unwarranted seizure of the government. His son Hippias was expelled by the Alemæonidæ, with the aid of the Spartans. Clisthenes completed the liberal reforms of Solon, and introduced the singular custom of ostracism. In three attempts to overthrow the free constitution of Athens, the Spartans and their allies were signally defeated. THIRD PERIOD. B. C. 500-338. =95.= The details of the Ionian Revolt (B. C. 499-494) have been found in the History of Persia.[43] Reserving his vengeance for the European Greeks who had interfered in the quarrel, Darius sought to console the conquered Ionians for the loss of their political independence by greater personal freedom. Just laws, equal taxes, peace and good order began to restore their prosperity; and when Mardonius, the son-in-law of Darius, succeeded Artaphernes in the satrapy, he signalized his reign by removing all tyrants and restoring to the cities a republican form of government. All this was done to secure their friendship or neutrality in his approaching expedition against Greece. That expedition (B. C. 492) failed, as we have seen, in its principal object. [Sidenote: B. C. 491.] =96.= The next year messengers were sent by Darius to each of the states of Greece, demanding earth and water, the customary symbols of obedience. None of the island states and few on the continent dared refuse. The people of Athens and Sparta returned an answer which could not be mistaken. The latter threw the envoys into a well, and the former into a pit where the vilest criminals were punished, telling them to get earth and water for themselves.