Alcuin Mtakatifu
De virtutibus et vitiis, also De vitiis et virtutum (moral treatise dedicated to Count Wido of Brittany, 799 x 800), ed. J.P. Migne. PL 101. Paris, 1851. 613-639 (transcript available online). A new critical edition is being prepared for the Corpus Christianorum, Continuatio Medievalis.