REMOVE

1. Horses.
2. negative
3. Photographs
4. Library of Congress Prints a …
5. between 1923 and 1929

WHAT

1. Nitrate negatives (1)
2. Portrait photographs (1)

WHO

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

WHEN

1. 1869-1942 (1)
2. 1923 (1)
3. 1929 (1)
4. between 1923 and 1929 (1)