REMOVE

1. Photographs
2. National Gallery of Canada
3. 1847

WHAT

1. Photograph (1)
2. half-tone (1)
3. salted paper print (1)

WHERE

1. European; British; Scotti … (2)
2. U.K. (Scotland) (2)

WHO

1. Hill, David Octavius (2)
2. National Gallery of Canad … (2)

WHEN

1. 1843 (2)
2. c. 1843-1847 (1)
3. c. 1843-1847, printed Jul … (1)