REMOVE

1. Autochromes
2. Landscape photographs
3. Library of Congress Prints a …
4. between 1911 and 1913

WHAT

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

WHO

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

WHEN

1. 1869-1942 (2)
2. 1911 (2)
3. 1913 (2)
4. between 1911 and 1913 (2)