REMOVE

1. Portrait photographs
2. Glass negatives
3. not before 1918 May
4. 1918

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. 1920 (1)
3. not before 1918 May (1)