REMOVE

1. Nitrate negatives
2. Horseback riding.
3. between 1896 and 1942

WHAT

1. Horseback riding. (1)
2. Nitrate negatives (1)
3. Photographs (1)
4. negative (1)

WHO

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

WHEN

1. 1869-1942 (1)
2. 1896 (1)
3. 1942 (1)
4. between 1896 and 1942 (1)