1884–1888
National Gallery of Art, 1750
National Gallery of Art, 1903
National Gallery of Art, 1939
National Gallery of Art, 1927
National Gallery of Art, 1490
National Gallery of Art, 1937
National Gallery of Art, 1900
National Gallery of Art, 1800
National Gallery of Art, 1936
National Gallery of Art, 1940
National Gallery of Art, 2000
National Gallery of Art, 1964
![Manuscript Pages [recto]](https://api.nga.gov/iiif/65905b1c-240d-4eba-a2ac-8ba08b90c390/full/843,/0/default.jpg)
![Over the River, Project for the Arkansas River, Colorado [bottom panel]](https://api.nga.gov/iiif/1d65e482-c059-416c-a706-29b20c9108f8/full/843,/0/default.jpg)
