That none of the forms of the English version can be from the same hand which wrote the original is made patent by their glaring errors of translation, but the Cotton text asserts in the preface that it was made by Mandeville himself, and this assertion was till lately taken on trust by almost all modern historians of English literature. The words of the original "je eusse cest livret mis en latin ... mais ... je l'ay mis en rōmant" were mistranslated as if "je eusse" meant "I had" instead of "I should have", and then (whether of fraudulent intent or by the error of a copyist thinking to supply an accidental omission) the words were added "and translated it aȝen out of Frensche into Englyssche." Mätzner seems to have been the first to show that the current English text cannot possibly have been made by Mandeville himself. Of the original French there is no satisfactory edition, but Vogels has undertaken a critical text, and Warner has added to his Egerton English text the French of a British Museum MS. with variants from three others.