REMOVE

1. animal, mules
2. Photographs
3. landscape, hot spring
4. albumen print
5. US, NV, Sioux Spring

WHAT

1. albumen print (1)
2. animal, mules (1)
3. artifact, camera (1)
4. landscape, hot spring (1)

WHERE

1. North American; American (1)
2. US, NV, Sioux Spring (1)

WHO

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

WHEN

1. 1868 (1)