REMOVE

1. World War, 1914-1918.
2. Spying.
3. Library of Congress Prints a …
4. 1917?

WHAT

1. Cats. (1)
2. Drawings and Watercolors (1)
3. Editorial cartoons (1)
4. pen and ink (1)
5. Rats. (1)
6. Uncle Sam (Nickname) (1)
7. World War, 1914-1918. (1)

WHO

1. Library of Congress Print … (1)
2. Rogers, W. A. (1)

WHEN

1. 1854-1931 (1)
2. 1917 (1)
3. 1917? (1)