- Europe in the Ninth and Tenth Centuries: R. H. Hodgkin.
Period II (919-1273).
- Papacy and Empire: F. W. Bussell.
- Constitutional and Social: H. W. C. Davis.
- Italy: G. Baskerville.
Period III (1273-1519).
- Western Europe: R. L. Poole.
Period IV (1414-1598).
- Italy in the Fifteenth Century: E. Armstrong.
Period VI (1715-1789).
- Introductory: L. G. Wickham Legg.