REMOVE

1. Group portraits
2. negative
3. Horseback riding.
4. Library of Congress Prints a …
5. Genthe, Arnold

WHAT

1. Group portraits (1)
2. Horseback riding. (1)
3. Nitrate negatives (1)
4. Photographs (1)
5. Portrait photographs (1)

WHO

1. Genthe, Arnold (1)
2. Library of Congress Print … (1)

WHEN

1. 1869-1942 (1)
2. 1911 (1)
3. 1942 (1)
4. between 1911 and 1942 (1)