REMOVE

1. Photographs
2. albumen print
3. landscape, islands
4. North American; American

WHAT

1. albumen print (1)
2. landscape, islands (1)
3. landscape, rock formation … (1)

WHERE

1. North American; American (1)
2. US, NV, Pyramid Lake (1)

WHO

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

WHEN

1. 1868 (1)
2. April, 1868 (1)