REMOVE

1. Portrait photographs
2. Photographs
3. Glass negatives
4. Library of Congress Prints a …
5. not before 1915 Dec

WHAT

1. Glass negatives (1)
2. Portrait photographs (1)
3. negative (1)

WHO

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

WHEN

1. -2 (1)
2. 1869-1942 (1)
3. 2 (1)
4. not before 1915 Dec (1)