The music of verse, though handled by every grammarian, merits more attention than has been given it. The subject is intimately connected with human nature; and to explain it thoroughly, several nice and delicate feelings must be employ’d. Entering upon this subject, it occurs as a preliminary point, By what mark is verse distinguished from prose? The discussion of this point is necessary, were it for no other purpose but to ascertain the nature and limits of our subject. To produce this distinguishing mark, is a task not perhaps so easy as may at first be apprehended. Verse of every sort, has, it is true, rules for its construction. It is composed of feet, the number and variety of which are ascertained. Prose, though also composed of feet, is more loose and scarce subjected to any rules. But many are ignorant of these rules: Are such left without means to make the distinction? And even with respect to the learned, must they apply the rule before they can with certainty pronounce whether the composition be prose or verse? This will hardly be maintained; and therefore, instead of rules, the ear must be appealed to as the proper judge. But what gain we by being thus referred to another standard? It still recurs, by what mark does the ear distinguish verse from prose? The proper and satisfactory answer is, That these make different impressions, which are readily distinguishable by every one who hath an ear. This advances us one step in our inquiry. Taking it then for granted, that verse makes upon the ear a different impression from that of prose; nothing remains but to explain this difference, and to assign its cause. To these ends, I must call to my aid an observation made above in treating of the sound of words, that they are more agreeable to the ear when composed of long and short syllables than when all the syllables are of the same sort. A continued sound in the same tone, makes an impression that comes not up to any idea we have of music. The same note successively renewed by intervals, is more agreeable; but still makes not a musical impression. To produce this impression, variety is necessary as well as number. The successive sounds or syllables, must be some of them long, some of them short; and if also high and low, the music is the more perfect. Now if this impression can be made by single words, much more by a plurality in an orderly succession. The musical impression made by a period consisting of long and short syllables arranged in a certain order, is what the Greeks call _rhythmus_, the Latins, _numerus_, and we _modulation_ or _measure_. Cicero justly observes, that in one continued sound there is no modulation: “Numerus in continuatione nullus est.” But in what follows he is wide of the truth, if by _numerus_ he means modulation or musical measure. “Distinctio, et æqualium et sæpe variorum intervallorum percussio, numerum conficit; quem in cadentibus guttis, quod intervallis