The Will to Doubt / An essay in philosophy for the general thinker

The Symbolism of Freemasonry / Illustrating and Explaining Its Science and Philosophy, Its Legends, Myths and Symbols

The Philosophy of the Moral Feelings

Ten Great Religions / An Essay in Comparative Theology

A Short History of Greek Philosophy

The Approach to Philosophy

The History of the Devil / As Well Ancient as Modern: In Two Parts

Five Stages of Greek Religion

Three Philosophical Poets / Lucretius, Dante, and Goethe

Christianity and Greek Philosophy / or, the relation between spontaneous and reflective thought / in Greece and the positive teaching of Christ and His / Apostles

The Mysteries of Free Masonry / Containing All the Degrees of the Order Conferred in a Master's Lodge