REMOVE

1. Photographs
2. Canyons.
3. Library of Congress Prints a …
4. 1911

WHAT

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

WHO

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

WHEN

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