1970
National Gallery of Art, 1940
National Gallery of Art, 1836
National Gallery of Art, 1936
National Gallery of Art, 1599
National Gallery of Art, 1614
National Gallery of Art, 1937
National Gallery of Art, 1884
National Gallery of Art, 1969
National Gallery of Art, 1938
National Gallery of Art, 1886
National Gallery of Art, 1913
National Gallery of Art, 1972
![Light Bulb [trial proof B]](https://api.nga.gov/iiif/edafcfc5-67d5-457d-bf83-544405c6a23a/full/843,/0/default.jpg)
![Studie einer Katze (Study of a Cat) [p. 5]](https://api.nga.gov/iiif/e84a45b9-af90-453e-9be3-3cd05e73d3a2/full/843,/0/default.jpg)
