Nutt's The Legends of the Holy Grail.
Jusserand's Piers Plowman.
Warren's Langland's Vision of Piers the Plowman, Done into Modern
Prose.
Savage's Old English Libraries.
Schofield's Chivalry in English Literature.
Snell's The Age of Chaucer.
Root's The Poetry of Chaucer.
Tuckwell's Chaucer (96 pp.).
Pollard's Chaucer (142 pp.).
Legouis's Chaucer.