- Religious thought and heresy in the Middle Ages
- The Roman empire: essays on the constitutional history from the accession of Domitian (81 A.D.) to the retirement of Nicephorus III (1081 A.D.) Volume 1
- Plato And Judaism
- The Hellenic Age: Platonism And Its Antecedents
- Christian theology and social progress; the Bampton lectures for 1905