1951
National Gallery of Art, 1936
National Gallery of Art, 1478
Williams, Dave H. and Reba W., 1920
National Gallery of Art, 1884
National Gallery of Art, 1922
National Gallery of Art, 1970
National Gallery of Art, 1938
National Gallery of Art, 1975
National Gallery of Art, 1952
Williams, Dave H. and Reba W., 1936
![Crocodile and Trochilus [reverse]](https://api.nga.gov/iiif/ccff09fd-9970-4f56-bfbd-c75494a2f5f8/full/843,/0/default.jpg)
![Singender (?) Mann und begonnene Studie (Two Figures, One Might Be Singing) [p. 15]](https://api.nga.gov/iiif/4e21a3be-173d-4259-83aa-4cbcdf1bb977/full/843,/0/default.jpg)
![Ale Cans [trial proof F]](https://api.nga.gov/iiif/3b97b86f-b9e9-4445-b2da-45f64bfb3aad/full/843,/0/default.jpg)
