REMOVE

1. half-tone
2. Photographs
3. European; British; Scottish …
4. National Gallery of Canada
5. Hill, David Octavius

WHERE

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

WHO

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

WHEN

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