Far from being quack, Â ; it became a focus for serious, well-founded and documented studies, beginning in the late 18th century and continuing for nearly 100 years. The widespread interest in phrenology spawned many objects and artifacts, including porcelain and plaster heads, ashtrays, etc. Of which cane heads have perhaps the most charm in the widely different expressions and aspects. A carved Walking Cane Handle in the Form of a Human Head with 36 Phrenological Markings for the Mental and Moral Faculties According to the System of Dr Franz Joseph Gall.