A roundel (not to be confused with the rondel) is a form of verse used in English language poetry devised by Algernon Charles Swinburne (1837–1909). It is a variation of the French rondeau form. It makes use of refrains, repeated according to a certain stylized pattern. A roundel consists of nine lines each having the same number of syllables, plus a refrain after the third line and after the last line. The refrain must be identical with the beginning of the first line: it may be a half-line, and rhymes with the second line...