Link to the Image Source
Metropolitan Museum of Art

Artwork Details 

Title: Panorama of Roman Campagna, Nov. 12, 1868 (from Sketchbook)
Dated: 1868
Medium: Graphite, white gouache, on blue paper
Dimensions: 4 1/2 x 9 in. (11.4 x 22.9 cm)
Location: Metropolitan Museum of Art
City, State: New York, NY