REMOVE

1. Photographs
2. albumen print
3. landscape, river valley
4. George Eastman House
5. O'Sullivan, Timothy H.

WHAT

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

WHERE

1. North American; American (3)
2. US, CA, Donner Summit (1)
3. US, CO, Conejos River (1)
4. US, WY (1)

WHO

1. George Eastman House (3)
2. O'Sullivan, Timothy H. (3)

WHEN

1. 1867 (1)
2. 1869 (1)
3. 1874 (1)