REMOVE

1. Photographs
2. landscape, river
3. landscape, waterfalls
4. albumen print
5. people, at work

WHAT

1. albumen print (1)
2. landscape, camp (1)
3. landscape, river (1)
4. landscape, waterfalls (1)
5. people, at work (1)

WHERE

1. North American; American (1)
2. US, ID (1)

WHO

1. George Eastman House (1)
2. O'Sullivan, Timothy H. (1)

WHEN

1. 1868 (1)
2. September, 1868 (1)