format to the stanzas of popular song and balladry.
Two of these additions are to "headnotes," monorhymed
sections of the narrative modeled on the Anglo-Norman rhymed laisses of the source, the Roman de Route Chevalerie.
The two poetic prophecies in this edition--one in decasyllabic rhymed couplets, the other in monorhymed
alexandrine laisses--are translations into Anglo-Norman of Geoffrey of Monmouth's Latin text of Prophetia Merlini ('Prophecies of Merlin').