REMOVE

1. Glass negatives
2. not before 1915 Dec
3. 2
4. -2

WHAT

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

WHO

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

WHEN

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