In such passages as these, how generous are Sidney, Shelley, and Coleridge to the prose-men! And yet these same poet-critics, in dozens of other passages, have explained the fundamental justification of metre, rhyme and stanza as elements in the harmony of verse. Harmony may be attained, it is true, by rhythms too complicated to be easily scanned in metrical feet, and by measures which disregard rhyme and stanza; and poets, as well as critics, by giving exclusive attention to a single element in harmony, are able to persuade themselves for the moment that all other elements are relatively negligible. Milton, in his zeal for blank verse, attacked rhyme, in which he had already proved himself a master, quite as fiercely as any of our contemporary champions of free verse. Campion, a trained musician, argued for a quantitative system of English prosody during the very period when he was composing, in the accentual system, some of the most exquisite songs in the language. Daniel, whose Defense of Rhyme (1603) was a triumphant reply to Campion's theory, gave courteous praise to his opponent's practice. Dryden, most flexible-minded of critics, argues now for, and now against the use of rhymed heroic couplets in the drama, fitting his theories to the changing currents of contemporary taste as well as to the varying, self-determined technique of his own plays. "Never wholly out of the way, nor in it," was Dryden's happy phrase to describe the artist's freedom, a freedom always conscious of underlying law.

2. Rhyme as a Form of Rhythm

However theory and practice may happen to coincide or to drift apart, the fundamental law which justifies rhyme and stanza seems to be this: if rhythm is a primary fact in poetry, and metre is, as Aristotle called it, sections of rhythm, any device of repeating identical or nearly identical sounds at measured intervals is an aid to rhythmical effect. Rhyme is thus a form, an "externalizing" of rhythm. It is structural as well as decorative, or rather, it is one way of securing structure, of building verse. There are other devices, of course, for attaining symmetrical patterns, for conveying an impression of unity in variety. The "parallel" structure of Hebrew poetry, where one idea and phrase is balanced against another,

"I have slain a man to my wounding—
And a young man to my hurt—"

or the "envelope" structure of many of the Psalms, where the initial phrase or idea is repeated at the close, after the insertion of illustrative matter, thus securing a pattern by the "return" of the main idea—the closing of the "curve"—may serve to illustrate the universality of the principle of balance and contrast and repetition in the architecture of verse. For Hebrew poetry, like the poetry of many primitive peoples, utilized the natural pleasure which the ear takes in listening for and perceiving again an already uttered sound. Rhyme is a gratification of expectation, like the repetition of a chord in music [Footnote: "Most musical compositions are written in quite obvious rhymes; and the array of familiar and classical works that have not only rhymes but distinct stanzaic arrangements exactly like those of poetry is worth remembering. Mendelssohn's 'Spring Song' and Rubinstein's 'Romance in E Flat' will occur at once as examples in which the stanzas are unmistakable." C. E. Russell, "Swinburne and Music," North American Review, November, 1907.] or of colors in a rug. It assists the mind in grasping the sense-rhythm,— the design of the piece as a whole. It assists the emotions through the stimulus to the attention, through the reinforcement which it gives to the pulsations of the psycho-physical organism.

"And sweep through the deep
While the stormy tempests blow,
While the battle rages long and loud
And the stormy tempests blow."

The pulses cannot help quickening as the rhymes quicken.

But in order to perform this structural, rhythmical purpose it is not necessary that rhyme be of any single recognized type. As long as the ear receives the pleasure afforded by accordant sound, any of the various historical forms of rhyme may serve. It may be Alliteration, the letter-rhyme or "beginning-rhyme" of Old English poetry:

"_H_im be _h_ealfe stod _h_yse unweaxen, _C_niht on ge_c_ampe, se full _c_aflice."

Tennyson imitates it in his "Battle of Brunanburh":