1972
National Gallery of Art, 1937
National Gallery of Art, 1756
National Gallery of Art, 1903
National Gallery of Art, 1513
National Gallery of Art, 1936
National Gallery of Art, 1806
National Gallery of Art, 1837
National Gallery of Art, 1953
National Gallery of Art, 1925
National Gallery of Art, 1997
National Gallery of Art, 1763
![Zone [trial proof]](https://api.nga.gov/iiif/ac089abd-a62b-4356-971b-e8cff96a8112/full/843,/0/default.jpg)
![Studies of a Head [verso]](https://api.nga.gov/iiif/1caeadfc-2105-43e8-83aa-8aaf576b889a/full/843,/0/default.jpg)
