1873
National Gallery of Art, 1954
National Gallery of Art, 1936
National Gallery of Art, 1627
National Gallery of Art, 1800
National Gallery of Art, 1852
National Gallery of Art, 1901
National Gallery of Art, 1853
National Gallery of Art, 1867
National Gallery of Art, 1530
National Gallery of Art, 1884
![Inscription [reverse]](https://api.nga.gov/iiif/61e37ea2-1a04-44a3-a072-46820ae2dbbc/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)