Trade Politics and Christianity in Africa and the East.
London: Longmans, 1916. [External link]

The War and Missions in the East.
London: R. Scott, 1919. [External link]

Lanfranc: A Study of His Life, Work and Writing.
London: Oxford University Press, H. Milford, 1926.

Berengar and the Virgin-birth.
London: Humphrey Milford, 1929.

Berengar and the Reform of Sacramental Doctrine.
London: Longmans, Green, 1930.

The Evangelical Doctrine of Holy Communion.
Cambridge: W. Heffer and Sons, 1930.

Hildebrand: A Life of Gregory VII.
London: Methuen, 1932.

Authority and Reason in the Early Middle Ages.
London: Oxford University Press, 1933.

Episcopi Vagantes in Church History.
London: Society for Promoting Christian Knowledge, 1945.