The Middle English romance of Athelston, preserved in a unique MS of the fourteenth century, has of late received some share of the recognition which its excellence deserves. The poet's narrative and descriptive powers have struck each reader with something of the effect of a discovery. But the full realization of his constructive skill and independent creative gift has only become possible through the light thrown on his sources by the studies of Gerould, Miss Hibbard (Laura Hibbard Loomis), and Beug. Each of these renders more unnecessary Zupitza's assumption of a French original and correspondingly raises our estimate of the English author. It is the purpose of the present paper to call attention to a further source, one that reveals still more clearly the workmanship of the poem.