1980
National Gallery of Art, 1978
National Gallery of Art, 1980
National Gallery of Art, 1916
National Gallery of Art, 1635
National Gallery of Art, 1969
National Gallery of Art, 1884
National Gallery of Art, 1950
National Gallery of Art, 1922
National Gallery of Art, 1938
National Gallery of Art, 1883
National Gallery of Art, 1633
National Gallery of Art, 1828
![Two Heads; Studies of Sheep [recto]](https://api.nga.gov/iiif/8268877b-c74c-46c7-85db-de619892d842/full/843,/0/default.jpg)
