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 conspiracy of Heraclides, whose life he had spared, and his base assassination by his friend Callippus.

Once more restored to Athens, Plato continued his lectures in the Academy, and also employed himself in composing those philosophical Dialogues which bear his name, and of which some thirty have come down to us. Several reasons probably contributed to make Plato throw his thoughts into this form. First, it was the only way in which he could give a just idea of the Socratic method, and of the persistent examination through which Socrates was wont to put all comers; again, he wished to show the chain of argument gradually unwinding itself, and by using the milder form of discussion and inquiry, to avoid even the appearance of dogmatism, especially as he must have often felt that he was treading on dangerous ground. Prolix and wearisome as some of these Dialogues may often seem to modern ears, we must remember that they were the first specimens of their kind; that they were written when the world was still young, when there was little writing of any sort, and when romances, essays, or "light literature" were unknown; while at the same time there was a clever, highly-educated, and sympathetic "public" ready then as now to devour, to admire, and to criticise. After the barren wastes of the old philosophy, with its texts and axioms, its quotations from the poets, and crude abstractions from nature, these Dialogues must have burst upon the Athenian world as an unexpected oasis upon weary travellers in the desert; and they must have hailed with delight these fresh springs of truth, and these