1953
National Gallery of Art, 1967
National Gallery of Art, 1884
National Gallery of Art, 1938
National Gallery of Art, 1935
National Gallery of Art, 1621
National Gallery of Art, 1946
National Gallery of Art, 1940
National Gallery of Art, 1939
National Gallery of Art, 1933
National Gallery of Art, 1936
National Gallery of Art, 1932
![Flags [working proof]](https://api.nga.gov/iiif/12995cd2-920f-4620-aaeb-aa2fdb7a9176/full/843,/0/default.jpg)
![Two Heads; Studies of Sheep [recto]](https://api.nga.gov/iiif/8268877b-c74c-46c7-85db-de619892d842/full/843,/0/default.jpg)
