1964–1969
National Gallery of Art, 1550
National Gallery of Art, 1973
National Gallery of Art, 1849
National Gallery of Art, 1728
National Gallery of Art, 1515
National Gallery of Art, 1953
National Gallery of Art, 1804
National Gallery of Art, 1684
National Gallery of Art, 1931
Patrons' Permanent Fund, 1951
National Gallery of Art, 1971
National Gallery of Art, 1660
![Treetops [verso]](https://api.nga.gov/iiif/1faa3651-63ac-4aa9-8889-2442bfea2275/full/843,/0/default.jpg)
