REMOVE

1. gelatin silver print
2. Photographs
3. architecture, stairway
4. North American; American
5. George Eastman House

WHAT

1. architecture, stairway (1)
2. gelatin silver print (1)
3. people, being photographe … (1)

WHERE

1. Canada, ONT, Toronto (1)
2. North American; American (1)

WHO

1. George Eastman House (1)
2. Mertin, Roger (1)

WHEN

1. 1973 (1)