REMOVE

1. landscape, mountains
2. albumen print
3. landscape, river valley
4. North American; American
5. US, WY
6. 1869

WHAT

1. Photographs (1)
2. albumen print (1)
3. landscape, mountains (1)
4. landscape, river valley (1)

WHERE

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

WHO

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