REMOVE

1. Rainbows.
2. Landscape photographs
3. autochrome
4. National parks & reserves.
5. Canyons.
6. Photographs
7. 1869-1942
8. between 1906 and 1912

WHAT

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