The Turkish conquest of Greece produced four Greek historians—Laonikos Chalkokondyles, Doukas, Phrantzes and the Turkophil Imbrian, Kritoboulos. I have already dealt with the first; the present paper treats of the second and third of the four. Doukas' history has been preserved not only in the Greek text but also in an old Italian version, which in some places supplies materials lacking in our Greek original. Doukas is an author worthy of study; for he was truthful and in several instances an eye-witness—qualities which, in the opinion of historians, far outweigh the barbarism of his style, which so much offended his supercilious editor in the defective Bonn edition.