| Louis-Pierre-Théophile Dubois de Nehaut Another Impossible Task 1854 Salted paper print from glass plate negative 16.3 x 21.2 cm (6 7/16 x 8 3/8 ins) Metropolitan Museum of Art Gilman Collection, Gift of The Howard Gilman Foundation, 2005, Accession Number: 2005.100.372.32 LL/40496
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