"First edition.""For this revision of his History of the middle ages, 300-1500 ... (W. W. Norton & company, inc., 1931) Professor Thompson put at my disposal a manuscript in which he made many alterations from the original text. I am deeply obligated to him not only for this opportunity presented, but also for the unlimited freedom he granted me to reorganize, rewrite and expand his manuscript."--Pref., signed: Edgar N. Johnson."References for further reading": p. 1053-1067.