Édouard Baldus, 1850s (ca), [East Facade, the Louvre, Paris], Salt print, 13 x 16 in, Lee Gallery, LL/22082

Édouard Baldus, 1850s (late), Pavillon des Tuileries, Albumen print, 27 x 20.8 cm (print) 43.5 x 33.7 cm (mount), Bassenge Photography Auctions, Courtesy of Bassenge, Berlin (Photography, Dec 2, 2009, Sale: 94, Lot: 4013), LL/33482

Édouard Baldus, 1851-1852 (ca), Le Louvre, Pavillon de l'Horloge, Salt print, 10 3/4 x 8 1/4, Charles Nes Photography LLC New York - Paris, LL/5743

Édouard Baldus, 1852 (ca), Early Notre Dame, Salt print, 14 x 17 5/8 in, Lee Gallery, LL/22084

Édouard Baldus, 1853, Maison Caree, Nimes [France], Albumen print, 12.6 x 17.1, Andrew Smith Gallery, LL/2367

Édouard Baldus, 1854 (ca), L'Arc de Triomphe de l'Etoile, Salt print, 13 1/2 x 17 1/2 in, Lee Gallery, LL/22088

Édouard Baldus, 1855, No. 28 Eglise de St. Wulfran a Abbeville, Salt print, 17 1/4 x 13 1/8 in, Lee Gallery, LL/22085

Édouard Baldus, 1855 (ca), Notre Dame, Albumen Print, 33.3 x 43.3 cm, Victoria and Albert Museum, Museum Number: 3172-1955, LL/36312

Édouard Baldus, 1857 (ca), St. Clotilde Basilica, Salt print, 12 7/8 x 17 in, Lee Gallery, Courtesy of Lee Gallery (ZZ1500), LL/22086

Henri Le Secq, 1851, Tower of Kings at Rheims, Salt print, 13 13/16 x 10 3/16 ins, J. Paul Getty Museum, 84.XP.370.25, LL/43662

Henri Le Secq, 1851, Cathedral at Laon, France (View between houses to Cathedral Portal), Calotype, 12 x 8 5/8 ins, George Eastman Museum, LL/33098

Henri Le Secq, 1851, Germany, Treves, Salt print paper negative, 32.8 x 23.3 cm, Private collection of Marco C. Antonetto, LL/27922

Henri Le Secq, 1852, Chartres Cathedral, detail, jamb statues supporting columns, [Chartres Cathedral (Commission des Monuments Historiques)], Photolithograph (encre grasse), 33.7 x 23.2 cm, George Eastman Museum, Museum Purchase (GEH NEG: 27460, 79:2634:0002), LL/7435

Henri Le Secq, 1852, [Large Figures on the North Porch, Chartres Cathedral], Salted paper print from paper negative, 32.8 x 22.1 cm (12 15/16 x 8 11/16 in), Metropolitan Museum of Art, Purchase, The Howard Gilman Foundation and Harriette and Noel Levine Gifts, Samuel J. Wagstaff Jr. Bequest, and Rogers Fund, 1990 (1990.1130), LL/6312

Henri Le Secq, 1852, Wooden Staircase at Chartres, Salted paper print from paper negative, 32.7 x 23.4 cm (12 7/8 x 9 3/16 ins), Metropolitan Museum of Art, Gilman Collection, Purchase, The Horace W. Goldsmith Foundation Gift, through Joyce and Robert Menschel, 2005, Accession Number: 2005.100.35, LL/37304

Henri Le Secq, 1852, [Jamb Figures, Chartres Cathedral], Salted paper print from paper negative, 33.4 x 23.5 cm (13 1/8 x 9 1/4 ins), Metropolitan Museum of Art, Purchase, The Horace W. Goldsmith Foundation Gift, through Joyce and Robert Menschel, 1999, Accession Number: 1999.72, LL/37305

Henri Le Secq, 1851, Treven, statue votive, Salted paper print, 32 x 22.8 cm, Musée d'Orsay, © photo musée d'Orsay / RMN, PHO 1983 165 18, INV 644, LL/37331

Gustave Le Gray, 1851-1855, Factory at Terre-Noire, Salt print, 9 5/16 x 13 1/16, J. Paul Getty Museum, © J. Paul Getty Trust [2000.13], LL/6042

Gustave Le Gray, 1853, France, Amélie les Baines P.O., Salt print paper negative, 23.4 x 30.1 cm, Private collection of Marco C. Antonetto, LL/27915

Gustave Le Gray, 1856 (ca), Musée des Beaux-Arts, Le Havre, Albumen print, from wet collodion negative, 12 9/16 x 16 1/2, Charles Isaacs Photographs, Inc, LL/4172

Gustave Le Gray, 1858 (ca), Le Louvre, pavillon de Sully, Albumen print, 50.2 x 39.3 cm, Pierre Bergé & Associés, Courtesy of Pierre Bergé & Associés (Auction, June 16, 2010, Lot: 653), LL/37265

Gustave Le Gray, 1858 (ca), Notre-Dame de Paris, Albumen print, 51.2 x 39 cm, Pierre Bergé & Associés, Courtesy of Pierre Bergé & Associés (Auction, June 16, 2010, Lot: 655), LL/37266

Gustave Le Gray, 1859, Mollien Pavilion, the Louvre, Albumen print, 14 7/16 x 18 7/8, J. Paul Getty Museum, © J. Paul Getty Trust [90.XM.72], LL/6047

Auguste Mestral, 1851 (ca), [Sculpture of Virgin and Child, Notre Dame, Paris], Salted paper print from paper negative, 35.1 x 27.6 cm (13 13/16 x 10 7/8 ins), Metropolitan Museum of Art, Purchase, The Horace W. Goldsmith Foundation Gift, through Joyce and Robert Menschel, 2000, Accession Number: 2000.290, LL/37302

Auguste Mestral, 1852-1853, [Angel of the Passion, Sainte-Chapelle, Paris], Salted paper print from paper negative, 32.9 x 20.3 cm (12 15/16 x 8 ins), Metropolitan Museum of Art, Gilman Paper Company Collection, Purchase, The Howard Gilman Foundation Gift, 2002, Accession Number: 2002.9, LL/37303

Le Gray & Mestral, 1851, [The Ramparts of Carcassonne], Salted paper print from paper negative, 9 1/4 x 13 1/16 in (23.5 x 33.2 cm), Metropolitan Museum of Art, Gilman Collection, Purchase, Harriette and Noel Levine Gift, 2005, Accession Number: 2005.100.34, LL/37306

Le Gray & Mestral, 1851, Moissac (Tarn-et-Garonne) Interior of a Cloister, St Peter's Church, Salted paper print from a dry waxed negative, 23.2 x 34.5 cm, Musée d'Orsay, © photo RMN, Hervé Lewandowski, DO 1979 20 négatif, LL/37310

Le Gray & Mestral, 1851, Aulnay (Charente-Maritime) - Ensemble sud-est, église Saint-Pierre, Salted paper print from paper negative, 37 x 26 cm, Musée d'Orsay, © photo musée d'Orsay / RMN, DO 1982 550, LL/37332