1966
National Gallery of Art, 1620
National Gallery of Art, 1939
National Gallery of Art, 1951
National Gallery of Art, 1480
National Gallery of Art, 1925
National Gallery of Art, 1937
National Gallery of Art, 1561
National Gallery of Art, 1605
National Gallery of Art, 1450
National Gallery of Art, 1963
National Gallery of Art, 1898
National Gallery of Art, 1884
![Passage I [misc. proof]](https://api.nga.gov/iiif/df05f0e7-f885-4835-81f9-7a5b9a2c133b/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)