246 The Prosody of the Eighteenth Century [CH« fly-boats that complete the squadron, this flag of syllabic and accentual regularity floats—only one or two privateer or picaroon small craft daring to disregard it. The heroic couplet of Dryden, already sufficiently discussed, underwent, in the earliest years after Dryden's death, changes which, considering the natural tendencies of humanity, may be called inevitable. By his own almost inimitable combination of skill and strength, and by the mechanical devices of triplet and Alexandrine, Dryden himself had kept off the monotony which the regular stopped couplet invites. But the invitation was sure to be accepted by others ; indeed, they might plead that they were only realising the ideal of the form. As Waller and others before Dryden, wittingly or unwittingly, had hit upon the other devices of sententious balance and a split in the individual lines, and of pendulum repetition in the couplets: so, after Dryden, first Garth and then Pope, no doubt with their eyes open, rediscovered these ; and the extraordinary craftsmanship of Pope carried the form to its highest possible perfection. If —and it is difficult to see how the assertion can be denied—the doctrine expressed in various ways but best formulated by De Quincey that 'nothing can go wrong by conforming to its own ideal' be true, the couplet of Pope, in and by itself, is invulnerable and imperishable. But it very soon appeared that a third adjective of the same class, which indicates almost a necessary quality of the highest poetic forms, could not be applied to it. It was not inimitable. The admitted difficulty, if not impossibility, of deciding, on internal evidence, as to the authorship of the books of The Odyssey trans- lated by Pope himself, as compared with those done by Fenton and Broome, showed the danger ; and the work of the rest of the century emphasised it Men like Savage, Churchill and Cowper went back to Dryden, or tried a blend of Dryden and Pope; men like Johnson and Goldsmith new-minted the Popian couplet, in the ore case by massive strength, in the other by easy grace of thought and phrase and form. But the dangers of monotony and of convention remained; and, towards the end of the period, they were fatally illustrated in the dull insignificance of Hoole and the glittering frigidity of Darwin. From one point of view, it is not fanciful or illogical to regard all other serious, and most other light, measures of this time as escapes from, or covert rebellions against, this supremacy of a single form of heroic; but, as has been pointed out above, one