| John Murray The Diwan-i Khas from the Mussaman Burj, Agra Palace 1862-1864 Waxed paper negative, with applied media 37.1 x 46.4cm (14 5/8 x 18 1/4 ins) (image) Metropolitan Museum of Art Purchase, Cynthia Hazen Polsky Gift, 1988, Accession Number:1988.1134.1 LL/78010 Observation by Mark Osterman (facebook, 14 October 2017)
"the yellow retouching absorbs blue light during printing in the sun ... opening up those shadow areas."
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