REMOVE

1. Sheep.
2. negative
3. Nitrate negatives
4. Landscape photographs
5. Library of Congress Prints a …
6. Genthe, Arnold

WHAT

1. Landscape photographs (1)
2. Nitrate negatives (1)
3. Photographs (1)

WHO

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

WHEN

1. 1869-1942 (1)
2. 1899 (1)
3. 1928 (1)
4. between 1899 and 1928 (1)