REMOVE

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

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)