1859–1869
National Gallery of Art, 1890
National Gallery of Art, 1470
National Gallery of Art, 1979
National Gallery of Art, 1590
National Gallery of Art, 1942
National Gallery of Art, 1681
National Gallery of Art, 1954
National Gallery of Art, 1720
National Gallery of Art, 1920
National Gallery of Art, 1967
National Gallery of Art, 1936
National Gallery of Art, 1797
![Sheet of Studies [recto]](https://api.nga.gov/iiif/49c325bf-6243-46eb-8215-f8830fd15641/full/843,/0/default.jpg)
![2 Wings for Wall and Person [top row, panel A]](https://api.nga.gov/iiif/03667754-af89-4eb8-b2b3-8d18d0440b1d/full/843,/0/default.jpg)
