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

Jack, R. D. S. "Caxton's Mirrour of the World and Henryson's 'Taill of the Cok and the Jasp.'" 13 (1978): 157-65.
Though a number of works have been suggested as sources for Henryson's "Tale of the Cok and the Jasp," none of them seems particularly close. Examination of Caxton's translation of the Image du Monde (Mirrour of the World) reveals several parallels to Henryson's work. The cock's rhetorical ability and focus on food, while not in other sources, can be found in Chapter 5 of Caxton's Mirrour. The conclusions to the two works are also parallel, suggesting that Henryson borrowed heavily from Caxton's Mirrour in his Morall Fabillis.