1979
National Gallery of Art, 1965
National Gallery of Art, 1657
National Gallery of Art, 1495
National Gallery of Art, 1889
National Gallery of Art, 1980
National Gallery of Art, 1935
National Gallery of Art, 1940
National Gallery of Art, 2012
National Gallery of Art, 1975
National Gallery of Art, 1884
![Cottonwood [working proof 1]](https://api.nga.gov/iiif/40bdee0d-8059-44e6-9148-2b7567f85b23/full/843,/0/default.jpg)
![Löwenkopf im Profil (Double Lion Profile) [p. 8]](https://api.nga.gov/iiif/e8eeb27a-28b5-46c2-b253-9f0e026b62f4/full/843,/0/default.jpg)