REMOVE

1. Forests.
2. Bridges.
3. Library of Congress Prints a …
4. 1869-1942

WHAT

1. Autochromes (1)
2. Photographs (1)
3. autochrome (1)

WHO

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

WHEN

1. 1906 (1)
2. 1942 (1)
3. between 1906 and 1942 (1)