To return to equality. Its idea embraces those of similarity, proportion, identity, repetition, and adaptation or fitness. It might not be very difficult to go even behind the idea of equality, and show both how and why it is that the human nature takes pleasure in it, but such an investigation would, for any purpose now in view, be supererogatory. It is sufficient that the fact is undeniable- the fact that man derives enjoyment from his perception of equality. Let us examine a crystal. We are at once interested by the equality between the sides and between the angles of one of its faces; the equality of the sides pleases us, that of the angles doubles the pleasure. On bringing to view a second face in all respects similar to the first, this pleasure seems to be squared; on bringing to view a third it appears to be cubed, and so on. I have no doubt, indeed, that the delight experienced, if measurable, would be found to have exact mathematical relation such as I suggest, that is to say, as far as a certain point, beyond which there would be a decrease in similar relations.
The perception of pleasure in the equality of sounds is the principle of Music. Unpractised ears can appreciate only simple equalities, such as are found in ballad airs. While comparing one simple sound with another they are too much occupied to be capable of comparing the equality subsisting between these two simple sounds taken conjointly, and two other similar simple sounds taken conjointly. Practised ears, on the other hand, appreciate both equalities at the same instant, although it is absurd to suppose that both are heard at the same instant. One is heard and appreciated from itself, the other is heard by the memory, and the instant glides into and is confounded with the secondary appreciation. Highly cultivated musical taste in this manner enjoys not only these double equalities, all appreciated at once, but takes pleasurable cognizance, through memory, of equalities the members of which occur at intervals so great that the uncultivated taste loses them altogether. That this latter can properly estimate or decide on the merits of what is called scientific music is of course impossible. But scientific music has no claim to intrinsic excellence; it is fit for scientific ears alone. In its excess it is the triumph of the physique over the morale of music. The sentiment is overwhelmed by the sense. On the whole, the advocates of the simpler melody and harmony have infinitely the best of the argument, although there has been very little of real argument on the subject.
In verse, which cannot be better designated than as an inferior or less capable Music, there is, happily, little chance for complexity. Its rigidly simple character not even Science- not even Pedantry can greatly pervert.
The rudiment of verse may possibly be found in the spondee. The very germ of a thought seeking satisfaction in equality of sound would result in the construction of words of two syllables, equally accented. In corroboration of this idea we find that spondees most abound in the most ancient tongues. The second step we can easily suppose to be the comparison, that is to say, the collocation of two spondees- or two words composed each of a spondee. The third step would be the juxtaposition of three of these words. By this time the perception of monotone would induce further consideration; and thus arises what Leigh Hunt so flounders in discussing under the title of "The Principle of Variety in Uniformity." Of course there is no principle in the case- nor in maintaining it. The "Uniformity" is the principle- the "Variety" is but the principle's natural safeguard from self-destruction by excess of self. "Uniformity," besides, is the very worst word that could have been chosen for the expression of the general idea at which it aims.
The perception of monotone having given rise to an attempt at its relief, the first thought in this new direction would be that of collating two or more words formed each of two syllables differently accented (that is to say, short and long) but having the same order in each word- in other terms, of collating two or more iambuses, or two or more trochees. And here let me pause to assert that more pitiable nonsense has been written on the topic of long and short syllables than on any other subject under the sun. In general, a syllable is long or short, just as it is difficult or easy of enunciation. The natural long syllables are those encumbered- the natural short syllables are those unencumbered with consonants; all the rest is mere artificiality and jargon. The Latin Prosodies have a rule that a "vowel before two consonants is long." This rule is deduced from "authority"- that is, from the observation that vowels so circumstanced, in the ancient poems, are always in syllables long by the laws of scansion. The philosophy of the rule is untouched, and lies simply in the physical difficulty of giving voice to such syllables- of performing the lingual evolutions necessary for their utterance. Of course, it is not the vowel that is long (although the rule says so), but the syllable of which the vowel is a part. It will be seen that the length of a syllable, depending on the facility or difficulty of its enunciation, must have great variation in various syllables; but for the purposes of verse we suppose a long syllable equal to two short ones, and the natural deviation from this relativeness we correct in perusal. The more closely our long syllables approach this relation with our short ones, the better, ceteris paribus, will be our verse: but if the relation does not exist of itself we force it by emphasis, which can, of course, make any syllable as long as desired;- or, by an effort we can pronounce with unnatural brevity a syllable that is naturally too long. Accented syllables are, of course, always long, but where unencumbered with consonants, must be classed among the unnaturally long. Mere custom has declared that we shall accent them- that is to say, dwell upon them; but no inevitable lingual difficulty forces us to do so. In fine, every long syllable must of its own accord occupy in its utterance, or must be made to occupy, precisely the time demanded for two short ones. The only exception to this rule is found in the caesura- of which more anon.
The success of the experiment with the trochees or iambuses (the one would have suggested the other) must have led to a trial of dactyls or anapaests- natural dactyls or anapaests- dactylic or anapaestic words. And now some degree of complexity has been attained. There is an appreciation, first, of the equality between the several dactyls or anapaests, and secondly, of that between the long syllable and the two short conjointly. But here it may be said, that step after step would have been taken, in continuation of this routine, until all the feet of the Greek Prosodies became exhausted. Not so; these remaining feet have no existence except in the brains of the scholiasts. It is needless to imagine men inventing these things, and folly to explain how and why they invented them, until it shall be first shown that they are actually invented. All other "feet" than those which I have specified are, if not impossible at first view, merely combinations of the specified; and, although this assertion is rigidly true, I will, to avoid misunderstanding, put it in a somewhat different shape. I will say, then, that at present I am aware of no rhythm- nor do I believe that any one can be constructed- which, in its last analysis, will not be found to consist altogether of the feet I have mentioned, either existing in their individual and obvious condition, or interwoven with each other in accordance with simple natural laws which I will endeavour to point out hereafter.
We have now gone so far as to suppose men constructing indefinite sequences of spondaic, iambic, trochaic, dactylic, or anapaestic words. In extending these sequences, they would be again arrested by the sense of monotone. A succession of spondees would immediately have displeased; one of iambuses or of trochees, on account of the variety included within the foot itself, would have taken longer to displease, one of dactyls or anapaests, still longer; but even the last, if extended very far, must have become wearisome. The idea first of curtailing, and secondly of defining, the length of a sequence would thus at once have arisen. Here then is the line of verse proper.* The principle of equality being constantly at the bottom of the whole process, lines would naturally be made, in the first instance, equal in the number of their feet; in the second instance, there would be variation in the mere number; one line would be twice as long as another, then one would be some less obvious multiple of another; then still less obvious proportions would be adoptednevertheless there would be proportion, that is to say, a phase of equality, still.