REMOVE

1. albumen silver print
2. Photographs
3. Canadian

WHAT

1. Photograph (3)
2. albumen silver print (3)

WHERE

1. Canada: Quebec (1)
2. Canada: Quebec, Montreal … (1)
3. U.S.A.: Niagara Falls (1)

WHO

1. National Gallery of Canad … (3)
2. Notman, William (2)
3. Henderson, Alexander (1)

WHEN

1. 1869 (2)
2. 1865 (1)
3. 1881 (1)
4. c. 1869-1881 (1)