Bois de Boulogne. Dated: 1858. Dimensions: sheet (trimmed to image): 20.7 x 34.4 cm (8 1/8 x 13 9/16 in.) support: 39.8 x 49.4 cm (15 11/16 x 19 7/16 in.) overall: 45.7 x 55.9 cm (18 x 22 in.). Medium: albumen print from collodion negative mounted on