L'art de connaitre les hommes par la physionomie
A 1806 Paris edition of Johann Caspar Lavater's treatise on physiognomy, which taught readers to judge character from facial features, and its engravings show profile heads in outline and stipple. Designers might draw on the pictures for their precise profile contours, graded shading on faces, and the old practice of reading character from the outline of a head.
