Another large group of hovering accents is that formed by French words with such terminations as _-our_, _-ance_, _-ace_, _-age_, _-ant_, _-ess_. In such cases the original tendency of the word was to accent the final syllable; but the general tendency of English accents being recessive, the words often passed through a transitional period when the accent was variable or "hovering." The first of the four lines just quoted shows us a word of this character. For an interesting presentation of certain phases of the laws of stress in English verse, see Robert Bridges's _Milton's Prosody_ (ed. 1901), Appendix J, "on the Rules of Stress Rhythms." B.--TIME-INTERVALS The fundamental principle of the rhythm of English verse (and indeed of any rhythm) is that _the accents appear at regular time-intervals_. In practice there is of course great freedom in departing from this regularity, the equal time-intervals being at times only a standard of rhythm to which the varying successions of accented and unaccented syllables are mentally referred. Where the equal time-intervals are observed with substantial regularity, two sorts of verse are still to be clearly distinguished: that in which not only the intervals of time but the numbers of syllables between the accents are substantially equal and regular, and that in which the number of syllables varies. The latter class is that of the native Germanic metres; the former is that of the Romance metres, and of modern English verse as influenced by them. With the development of regularity in the counting of syllables there has perhaps also taken place a development of regularity in the regular counting of the time-intervals. In other words, the modern English reader, where the number of syllables between accents is variable, makes the time-intervals as nearly equal as possible by lengthening and shortening the syllables in the manner permitted by the freedom of English speech; in early English verse, where the number of syllables between accents varied very greatly, we cannot be sure that the time-intervals were so accurately felt or preserved in recitation. i. _Verse showing fairly regular intervals between accents_ Avoid extremes; and shun the fault of such Who still are pleas'd too little or too much. At every trifle scorn to take offence, That always shows great pride, or little sense: Those heads, as stomachs, are not sure the best, Which nauseate all, and nothing can digest. Yet let not each gay turn thy rapture move; For fools admire, but men of sense approve: As things seem large which we through mist descry, Dulness is ever apt to magnify. (POPE: _Essay on Criticism_, ll. 384-393.)