Note 1 — Chapter II
Reading edition
A history of the distinction is given by Brierre de Boismont, in his work On Illusions (translated by R. T. Hulme, 1859). He says that Arnold (1806) first defined hallucination, and distinguished it from illusion. Esquirol, in his work, Des Maladies Mentales (1838), may be said to have fixed the distinction. (See Hunt's translation, 1845, p. 111.)