In the early 1820s, in the gloomy aftermath of the 1789 Revolution and the Napoleonic wars, the French Romantic painter Theodore Gericault (1791-1824) made five portraits of patients in an asylum or clinic. No depictions of madness before or since can compare with them for humanity, straightforwardness and immediacy. Why were they painted? For whom? Art-historical ways of accounting for them open up questions about the nature of psychoanalytic...