Europe • Great Britain
| The Cabinet Card (5 1/2 x 4 inches) becomes popular in Great Britain but spreads rapidly around the world.
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Europe • Great Britain
| The Woodburytype process is patented. Walter Bentley Woodbury of Kingston-on-Thames showed specimens of his Patent Photo-Relief Process to the Photographic Society of Scotland (10 February 1866)
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Europe • Scotland
| Thomas Annan (1829-1887) is commissioned to record alleys and dismal slums for the Glasgow Improvement Trust and these are published in The Old Closes and Streets of Glasgow (1878)
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North America • USA
| Alexander Gardner uses his own plates and the works of other photographers to publish Gardner's Photographic Sketch Book of the War which contains 100 tipped in albumen prints divided into two volumes. It is the most important photographic work on the American Civil War.
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