REMOVE

1. Portrait photographs
2. Nitrate negatives
3. negative
4. between 1906 and 1914

WHAT

1. Group portraits (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. 1906 (1)
3. 1914 (1)
4. between 1906 and 1914 (1)