REMOVE

1. Photographs
2. landscape, mountains
3. landscape, river valley
4. albumen print
5. 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)