beginning of the line and another pair at the end. Each line always includes a pause, called a caesura, at some point after the first two stresses, dividing it into two half-lines. Although he follows the form of his day, the Gawain Poet was freer with convention than his or her predecessors. The poet broke the alliterative lines into variable-length groups and ended these nominal stanzas with a rhyming section of five lines known as the bob and wheel, in which the "bob" is a very short line, sometimes of only two syllables, followed by the "wheel," longer lines with internal rhyme. Similar stories The earliest known story to feature a beheading game is the 8th-century Middle Irish tale Bricriu's Feast. This story parallels Gawain in that, like the Green Knight, Cú Chulainn's antagonist feints three blows with the axe before letting his target depart without injury. A beheading exchange also appears in the late 12th-century Life of Caradoc, a Middle French narrative embedded in the anonymous First Continuation of Chrétien de Troyes' Perceval, the Story of the Grail. A notable difference in this story is that Caradoc's challenger is his father in disguise, come to test his honour. Lancelot is given a beheading challenge in the early 13th-century Perlesvaus, in which a knight begs him to chop off his head or else put his own in jeopardy. Lancelot reluctantly cuts it off, agreeing to come to the same place in a year to put his head in the same danger. When Lancelot arrives, the people of the town celebrate and announce that they have finally found a true knight, because many others had failed this test of chivalry. The stories The Girl with the Mule (alternately titled The Mule Without a Bridle) and feature Gawain in beheading game situations. In Hunbaut, Gawain cuts off a man's head and, before he can replace it, removes the magic cloak keeping the man alive, thus killing him. Several stories tell of knights who struggle to stave off the advances of women sent by their lords as a test; these stories include Yder, the Lancelot-Grail, Hunbaut, and The Knight with the Sword. The last two involve Gawain specifically. Usually, the temptress is the daughter or wife of a lord to whom the knight owes respect, and the knight is tested to see whether or not he will remain chaste in trying circumstances. In