REMOVE

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

WHAT

1. albumen print (1)
2. landscape, mountains (1)
3. 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)

WHEN

1. 1869 (1)