Dissatisfaction, somber thoughts (left); Reflection (right), plate 14 from the album, The Mechanism of Human Facial Expression. Dated: 1854-1856. Dimensions: image: 22.1 ? 15.9 cm (8 11/16 ? 6 1/4 in.) mount: 40.4 ? 27.7 cm (15 7/8 ? 10 7/8 in.). Med