2017
National Gallery of Art, 1940
National Gallery of Art, 1673
National Gallery of Art, 1979
National Gallery of Art, 1936
National Gallery of Art, 1899
National Gallery of Art, 1800
National Gallery of Art, 1951
National Gallery of Art, 1900
National Gallery of Art, 1884
National Gallery of Art, 1880
National Gallery of Art, 1954
National Gallery of Art, 1929
![Studio Forms [special proof]](https://api.nga.gov/iiif/5d40037c-e5d6-4e5e-8e2b-0085815eeddb/full/843,/0/default.jpg)
![begonnene Skizze eines Mannes mit Bart (Sketch of a Man with a Beard) [p. 18]](https://api.nga.gov/iiif/61ca3cb8-f1ff-4533-8ff2-2904449985e9/full/843,/0/default.jpg)
