1915–1925
National Gallery of Art, 1880
National Gallery of Art, 1939
National Gallery of Art, 1967
National Gallery of Art, 1736
National Gallery of Art, 1961
National Gallery of Art, 1952
National Gallery of Art, 1930
Solomon, Dan and Mary, 1960
National Gallery of Art, 1905
National Gallery of Art, 1977
National Gallery of Art, 1955
National Gallery of Art, 1884
![Untitled [man with a white collar] [recto]](https://api.nga.gov/iiif/ded79061-a4d0-4e28-8639-c382f6f5ad22/full/843,/0/default.jpg)
![begonnene Elefantenstudie (Initial Sketch of an Elephant) [p. 29]](https://api.nga.gov/iiif/665654d3-a139-497c-976c-0e34ef83de68/full/843,/0/default.jpg)