REMOVE

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

WHAT

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

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WHO

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

WHEN

1. 1869-1942 (1)
2. 1906 (1)
3. between 1906 and 1912 (1)