The Chaucer Review: An Indexed Bibliography (Vols. 1-30)

Ruud, Jay. "Chaucer's Envoy to Scogan: 'Tullius kyndenesse' and the Law of Kynde." 20 (1986): 323-30.
Understanding the references to Tullius in Chaucer's Lenvoy de Chaucer a Scogan allows critics to recognize the purpose and unity of the poem. The reference to Cicero alludes to De Amicitia, which makes two points about love applicable to Scogan. Chaucer uses these allusions to point out that Scogan has broken the law of kind in love by deciding to love a woman who cannot love him in return. Chaucer then elevates the divine love that holds the universe together. The tension between these two kinds of love unifies the poem.