Horizontal drawing of woods and rolling hills in the distanceseen in the light of an approaching storm. Foreground of sketch not completed. Date: 1860–70. Dimensions: 24 x 30.4 cm (9 7/16 x 11 15/16 in.). Medium: brush and oil, pencil on cardboard. Collection: Cooper Hewitt, Smithsonian Design Museum. Drawing, Mountainous landscape, 1860–70 (CH 18193731)
