The following pages are a discussion of the origin of the second half of Chrétien's Ivain; the part of the story, namely, in which the hero wins the title Chevalier au Lion. They are a continuation of a study published in 1903, which dealt chiefly with the first half of the romance. That study, to which frequent reference must necessarily be made, endeavored to show that the Ivain is a partly rationalized fairy mistress story. The kernel of the evidence there presented was a detailed comparison of the Ivain with stories in the Lebor na h-Uidre (LU) and the Book of Leinster (LL), two Irish manuscripts that were actually written before the time of Chrétien de Troyes. The first part of the Ivain was shown to be founded, almost incident for incident, on the well-known Celtic tale, of which the Serglige Conculaind is an ancient example, about a mortal who is invited to fairyland, journeys thither successfully and weds a fairy queen, but disobeys her injunctions, loses her, becomes insane and has to be cured by a magic remedy.