... lines of modern English verse is the so-called septenary (septenarius), having had a nearly continuous tradition from the twelfth-century Poema Morale down (in its divided form) to the present. It began as a single line of seven stresses or fourteen syllables, and continued to be used as such through the Elizabethan period, and sporadically ... — The Principles of English Versification • Paull Franklin Baum
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