| Charles Nègre Negre's Assistant Checking a Heliogravure of Yvon's "Battle of Malakoff" in the Studio Courtyard at 21 Quai Bourbon, Paris 1855 Collodion glass plate negative 7 1/16 x 5 1/4 in. (18.1 x 13.5 cm) Contemporary Works / Vintage Works Inventory no: 12129 LL/77062
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