REMOVE

1. negative
2. Photographs
3. Mothers & children.
4. Nitrate negatives
5. Library of Congress Prints a …
6. 1926 or 1927

WHAT

1. Group portraits (1)
2. Mothers & children. (1)
3. Nitrate negatives (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. 1926 or 1927 (1)