Sketches and Studies in Italy and Greece, First Series

Renaissance in Italy, Volumes 1 and 2 / The Catholic Reaction

Renaissance in Italy Volume 3 / The Fine Arts

A Problem in Modern Ethics / being an inquiry into the phenomenon of sexual inversion, / addressed especially to Medical Psychologists and Jurists

The Life of Michelangelo Buonarroti

A Problem in Greek Ethics / Being an inquiry into the phenomenon of sexual inversion