XENOPHON, the son of Gryllus, was also an Athenian, and was probably born about B.C. 444. He was a pupil of Socrates, who saved his life at the battle of Delium (B.C. 424). His accompanying Cyrus the younger in his expedition against his brother Artaxerxes, king of Persia, formed a striking episode in his life, and has been recorded by himself in his ANABASIS. He seems to have been still in Asia at the time of the death of Socrates in 399 B.C., and was probably banished from Athens soon after that period, in consequence of his close connexion with the Lacedaemonians. He accompanied Agesilaus, the Spartan king, on the return of the latter from Asia to Greece; and he fought along with the Lacedaemonians against his own countrymen at the battle of Coronea in 394 B.C. After this battle he went with Agesilaus to Sparta, and soon afterwards settled at Scillus in Elis, near Olympia. He is said to have lived to more than 90 years of age, and he mentions an event which occurred as late as 357 B.C. Probably all the works of Xenophon are still extant. The ANABASIS is the work on which his fame as an historian chiefly rests. It is written in a simple and agreeable style, and conveys much curious and striking information. The HELLENICA is a continuation of the history of Thucydides, and comprehends in seven books a space of about 48 years; namely, from the time when Thucydides breaks off, B.C. 411, to the battle of Mantinea in 362. The subject is treated in a very dry and uninteresting style; and his evident partiality to Sparta, and dislike of Athens, have frequently warped his judgment, and must cause his statements to be received with some suspicion. The CYROPAEDIA, one of the most pleasing and popular of his works, professes to be a history of Cyrus, the founder of the Persian monarchy, but is in reality a kind of political romance, and possesses no authority whatever as an historical work. The design of the author seems to have been to draw a picture of a perfect state; and though the scene is laid in Persia, the materials of the work are derived from his own philosophical notions and the usages of Sparta engrafted on the popularly current stories respecting Cyrus. Xenophon displays in this work his dislike of democratic institutions like those of Athens, and his preference for an aristocracy, or even a monarchy. Xenophon was also the author of several minor works; but the only other treatise which we need mention is the MEMORABILIA of Socrates, in four books, intended as a defence of his master against the charges which occasioned his death, and which undoubtedly contains a genuine picture of Socrates and his philosophy. The genius of Xenophon was not of the highest order; it was practical rather than speculative; but he is distinguished for his good sense, his moderate views, his humane temper, and his earnest piety.