1838–1850
National Gallery of Art, 1838
National Gallery of Art, 1937
National Gallery of Art, 1884
National Gallery of Art, 1938
National Gallery of Art, 1983
National Gallery of Art, 1935
National Gallery of Art, 1936
National Gallery of Art, 1920
National Gallery of Art, 1510
National Gallery of Art, 1899
National Gallery of Art, 1993
![Studies of a Cow [verso]](https://api.nga.gov/iiif/598328ce-72ec-4b2c-90ae-500069945b17/full/843,/0/default.jpg)
