REMOVE

1. Portrait photographs
2. Acetate negatives
3. Photographers.
4. 1942

WHAT

1. Acetate negatives (1)
2. Photographs (1)
3. Portrait photographs (1)
4. negative (1)

WHO

1. Library of Congress Print … (1)
2. Unknown (1)

WHEN

1. 1911 (1)
2. between 1911 and 1942 (1)