REMOVE

1. oil, paper, sand, and pen an …
2. Unknown

WHAT

1. Paintings (1)
2. oil, paper, sand, and pen … (1)

WHERE

1. North American; American (1)

WHO

1. Smithsonian American Art … (1)

WHEN

1. 1906 (1)
2. 1972 (1)
3. after 1906 (1)
4. n.d. (1)