This is assumed from a satirical reference in the Flyting of Dunbar and Kennedie, where, too, it is hinted that he was a member of the noble house of Dunbar.
In the Flyting of Dunbar and Kennedie, an outstanding specimen of a favourite northern form, analogous to the continental estrif, or tenzone, he and his rival reach a height of scurrility which is certainly without parallel in English literature.
It has the incidental interest of showing (especially in stanzas 62 and 63) the antipathy of the "Inglis-speaking Scot" to the "Scots-speaking Gael" of the west, as is also shown in Dunbar's Flyting with Kennedy.
The whole of the "flyting" was reprinted in 1560 as The Contention betwixte Churchyard and Camell.
Scraps may be unearthed as mediocre as the Answer to Curat Caddel's Satyre upon the Whigs, which attempts to revive the mere vulgarity of the Scots " flyting."