SYSTEMS OF ENGLISH PROSODY--THE ACCENTUAL OR STRESS
[Sidenote: Classical prosody uniform in theory.]
The great difficulty attending the study of English prosody, and the cause of the fact that no book hitherto published can be said to possess actual authority on the subject, arises from the other fact that no general agreement exists, or ever has existed, on the root-principles of the matter.[3] Classical writers on metre, of whom we possess a tolerable stock, differed with each other on many minor points of opinion, and from each other in the ways in which they attacked the subject. But they were practically agreed that "quantity" (_i.e._ the difference of technical "time" in pronunciation of syllables) and "feet"--that is to say, certain regular mathematical combinations of "long" and "short" quantity--constituted metre. They had indeed accent--the later Greeks certainly and the Latins probably--which was independent of, and perhaps sometimes opposed to, quantity; but except in what we call the ante-classical times of Latin and the post-classical times of both Latin and Greek, it had nothing to do with metrical arrangement. They had different values of "long" and "short"; but these did not affect metre, nor did the fact that in both languages, but especially in Greek, a certain number of syllables were allowed to be "common"--that is to say, capable of taking the place of "long" or "short" alike. The central system of prosodic arrangement (till the flooding of the later Empire with "barbarians" of various nationality and as various intonation and modes of speech broke it down altogether) remained the same. "Longs" and "shorts" in the various combinations and permutations possible, up to three syllables most commonly, up to four in fewer cases, and possibly up to five in still fewer, made up _lines_ which experiment discovered to be harmonious, and practice adopted as such. These lines were sometimes used continuously (with or without certain internal variations of feet, considered equivalent to each other), as in modern blank verse; sometimes arranged in batches corresponding more or less to each other, as in modern couplet or stanza poetry.
On the other hand, though English prosodists may sometimes agree on details, translated into their different terminologies, the systems which lie at the root of these terminologies are almost irreconcilably different. Even the reduction of these systems to three types may excite protest, though it is believed that it can be made out without begging the question in favour of any one.