Attention (left); Severity, aggression (right), between 1854 and 1856

Date: between 1854 and 1856. Dimensions: image: 22.1 × 15.8 cm (8 11/16 × 6 1/4 in.); ; mount: 40.2 × 27.5 cm (15 13/16 × 10 13/16 in.). Medium: albumen print. Collection: National Gallery of Art.