Charles Negre: Cathedrale de Chartres, porte de la vierge du portail royale. c. 1857, Nègre process gravure in black ink, 23-1/2 x 17-3/4 in. (597 x 451 mm), on original mount., Illus. as pl. 155 in Charles Nègre, Borcoman, National Gallery of Canada, 1976. L1036.