The final episode of the third book of The Faerie Queene has never received adequate interpretation. By analogy to the final episodes of the other books Busyrane should be the great enemy to chastity, and his defeat should be accomplished through the virtue of chastity. Previous interpretations have not defined the allegorical appropriateness of Busyrane and his mask of Cupid as the climactic testing of Spenser's knight of chastity. The problem for the reader is to see how Britomart's experience at the house of Busyrane solves Amoret's problem and at the same time is the final challenge to her own virtue.