REMOVE

1. National parks & reserves.
2. Rainbows.
3. Canyons.
4. autochrome
5. Landscape photographs
6. Autochromes
7. 1869-1942

WHAT

1. Landscape photographs (1)
2. National parks & reserves … (1)
3. Photographs (1)

WHO

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

WHEN

1. 1906 (1)
2. 1912 (1)
3. between 1906 and 1912 (1)