overcome, because they are in their own nature insuperable; but against which he has struggled with so much art and diligence, that he may at least be said to have deserved success.
The hexameter of the ancients may be considered as consisting of fifteen syllables, so melodiously disposed, that, as every one knows who has examined the poetical authors, very pleasing and sonorous lyrick measures are formed from the fragments of the heroick. It is, indeed, scarce possible to break them in such a manner, but that invenias etiam disjecti membra poetæ, some harmony will still remain, and the due proportions of sound will always be discovered. This measure therefore allowed great variety of pauses, and great liberties of connecting one verse with another, because wherever the line was interrupted, either part singly was musical. But the ancients seem to have confined this privilege to hexameters; for in their other measures, though longer than the English heroick, those who wrote after the refinements of versification, venture so seldom to change their pauses, that every variation may be supposed rather a compliance with necessity than the choice of judgment.
Milton was constrained within the narrow limits of a measure not very harmonious in the utmost perfection; the single parts, therefore, into which it was to be sometimes broken by pauses, were in danger of losing the very form of verse. This has, perhaps, notwithstanding all his care, sometimes happened.
As harmony is the end of poetical measures, no part of a verse ought to be so separated from the rest as not to remain still more harmonious than prose, or to shew, by the disposition of the tones,
