Read it through once

But by the end of the first quarter of the present century, the great poetical billow, which was not indeed caused by, but received an impulse from, the great political billow, the French Revolution (for they were cognate or co-radical movements), had quite spent itself, and English poetry was at a comparatively low ebb. The Poetical Revolution had done its work. A poetical interregnum of a few years’ duration followed, in which there appeared to be a great reduction of the spiritual life of which poetry is the outgrowth.