The principle of onomatopea has fallen into discredit, partly because it has been supposed to imply an actual manufacture of words out of syllables and letters, like a piece of joiner’s work,—a theory of language which is more and more refuted by facts, and more and more going out of fashion with philologians; and partly also because the traces of onomatopea in separate words become almost obliterated in the course of ages. The poet of language cannot put in and pull out letters, as a painter might insert or blot out a shade of colour to give effect to his picture. It would be ridiculous for him to alter any received form of a word in order to render it more expressive of the sense. He can only select, perhaps out of some dialect, the form which is already best adapted to his purpose. The true onomatopea is not a creative, but a formative principle, which in the later stage of the history of language ceases to act upon individual words; but still works through the collocation of them in the sentence or paragraph, and the adaptation of every word, syllable, letter to one another and to the rhythm of the whole passage. iv. Next, under a distinct head, although not separable from the preceding, may be considered the differentiation of languages, i.e. the manner in which differences of meaning and form have arisen in them. Into their first creation we have ceased to enquire: it is their aftergrowth with which we are now concerned. How did the roots or substantial portions of words become modified or inflected? and how did they receive separate meanings? First we remark that words are attracted by the sounds and senses of other words, so that they form groups of nouns and verbs analogous in sound and sense to one another, each noun or verb putting forth inflexions, generally of two or three patterns, and with exceptions. We do not say that we know how sense became first allied to sound; but we have no difficulty in ascertaining how the sounds and meanings of words were in time parted off or differentiated. (1) The chief causes which regulate the variations of sound are (a) double or differing analogies, which lead sometimes to one form, sometimes to another (b) euphony, by which is meant chiefly the greater pleasure to the ear and the greater facility to the organs of speech which is given by a new formation or pronunciation of a word (c) the necessity of finding new expressions for new classes or processes of things. We are told that changes of sound take place by innumerable gradations until a whole tribe or community or society find themselves acquiescing in a new pronunciation or use of language. Yet no one observes the change, or is at all aware that in the course of a lifetime he and his contemporaries have appreciably varied their intonation or use of words. On the other hand, the necessities of language seem to require that the intermediate sounds or meanings of words should quickly become fixed or set and not continue in a state of