An edition of an anonymous poem about the famous thirteenth-century outlaw Eustache surnamed Le Moine (ca. 1170-1217), son of the Boulonnais nobleman Baudoin Busket, that survives in a single manuscript. Conlon’s introduction explores the historical background, summarizes the content of the poem, analyzes its language and explains the editorial policy. Notes, an Appendix containing historical and literary texts that mention Eustache le Moine, a Table des noms propres, noms de lieu, etc., a Glossaire and a Bibliographie conclude the edition.