“Imagine hearing the lines of the second quatrain as a series of introductions.”

“This makes it difficult to say when a particular quatrain has missed or hits its mark.”

“From Wintering Out through North, Heaney had normally used an unrhymed quatrain with short lines of irregular metre.”

“The source texts are then reformed into single aphoristic lines, couplets, quatrains, and whole poems.”

“His four-line verses or quatrains, each of two rhymed couplets, were written in groups of 100, known as Centuries.”

“Among the hardy perennials, quatrains and sonnets, we encounter such exotic metrical cultivars as sapphics and cretics.”