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A doctor, nurse and patient. The sign on the wall reads 'Guys Hospital Visiting........' From a magic lantern series (early 20th century). Magic lanterns, first developed in the 17th Century, were precursors of modern slide projectors.

Image: (c) Beamish, The Living Museum of the North.

Photo Number 6107. Used with permission. For information on magic lanterns, see http://www.magiclantern.org.uk.

(Lytebox viewer by Markus F. Hay, 2006-2012 CC BY)