REMOVE

1. Photographs
2. gelatin silver print
3. people, being photographed
4. North American; American

WHAT

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

WHERE

1. North American; American (3)
2. Canada, ONT, Toronto (1)
3. US, NY, Rochester (1)

WHO

1. George Eastman House (3)
2. Mertin, Roger (3)

WHEN

1. 1971 (2)
2. 1973 (1)