REMOVE

1. Portrait photographs
2. Horseback riding.
3. negative
4. Genthe, Arnold
5. between 1926 and 1942

WHAT

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

WHO

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

WHEN

1. 1869-1942 (1)
2. 1926 (1)
3. 1942 (1)
4. between 1926 and 1942 (1)