Lectures on Popular Education: Delivered to the Edinburgh Association for Procuring Instruction in Useful and Entertaining Science

The Constitution of Man Considered in Relation to External Objects

The Suppressed Documents, Or, An Appeal to the Public Against the Conductors of the Scottish Guardian

Phrenology Applied to Painting and Sculpture

A System of Phrenology

Lectures on Moral Philosophy: Delivered Before the "Edinburgh Philosophical Society," and Reported for the "Edinburgh Chronicle."

Moral and Intellectual Science: Applied to the Elevation of Society

Crania Americana; Or, A Comparative View of the Skulls of Various Aboriginal Nations of North and South America: To which is Prefixed an Essay on the Varieties of the Human Species