invention of a barbarous age

Rhime being no necessary Adjunct or true Ornament of Poem or good Verse, in longer Works especially, but the Invention of a barbarous Age, to set off wretched matter and lame Meeter; grac’t indeed since by the use of some famous modern Poets, carried away by Custom, but much to thir own vexation, hindrance, and constraint to express many things otherwise, and for the most part worse then else they would have exprest them.

—John Milton, "The Measure is English Heroic Verse without Rime," introduction to 1674 edition of Paradise Lost