The fear of tautology has doubtless led to the multiplications of words and the meanings of words, and generally to an enlargement of the vocabulary. It is a very early instinct of language; for ancient poetry is almost as free from tautology as the best modern writings. The speech of young children, except in so far as they are compelled to repeat themselves by the fewness of their words, also escapes from it. When they grow up and have ideas which are beyond their powers of expression, especially in writing, tautology begins to appear. In like manner when language is “contaminated” by philosophy it is apt to become awkward, to stammer and repeat itself, to lose its flow and freedom. No philosophical writer with the exception of Plato, who is himself not free from tautology, and perhaps Bacon, has attained to any high degree of literary excellence. To poetry the form and polish of language is chiefly to be attributed; and the most critical period in the history of language is the transition from verse to prose. At first mankind were contented to express their thoughts in a set form of words having a kind of rhythm; to which regularity was given by accent and quantity. But after a time they demanded a greater degree of freedom, and to those who had all their life been hearing poetry the first introduction of prose had the charm of novelty. The prose romances into which the Homeric Poems were converted, for a while probably gave more delight to the hearers or readers of them than the Poems themselves, and in time the relation of the two was reversed: the poems which had once been a necessity of the human mind became a luxury: they were now superseded by prose, which in all succeeding ages became the natural vehicle of expression to all mankind. Henceforward prose and poetry formed each other. A comparatively slender link between them was also furnished by proverbs. We may trace in poetry how the simple succession of lines, not without monotony, has passed into a complicated period, and how in prose, rhythm and accent and the order of words and the balance of clauses, sometimes not without a slight admixture of rhyme, make up a new kind of harmony, swelling into strains not less majestic than those of Homer, Virgil, or Dante.