REMOVE

1. National parks & reserves.
2. Autochromes
3. Library of Congress Prints a …
4. between 1906 and 1912
5. 1912

WHAT

1. autochrome (1)
2. Canyons. (1)
3. Landscape photographs (1)
4. National parks & reserves … (1)
5. Photographs (1)
6. Rainbows. (1)

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)