Roger Fenton, 1856, The Sanitary Commission, Salt print, 7 7/16 x 6 3/16 in, Lee Gallery, Image courtesy of the Lee Gallery (www.leegallery.com), LL/3210

Louis Jacques Mandé Daguerre, n.d., Daguerre, Lithograph, Archives of Modern Conflict OR National Gallery of Canada, LL/9696

Henry Fox Talbot, 1846, Chess Players, Salted paper print, 8.2 x 7 cm, Harry Ransom Humanities Research Center at the University of Texas at Austin, HRC, LL/6138

Unidentified photographer, n.d., Nadar, Photograph, 14.2 x 9.5 cm, Source requested, LL/6572

J.E. Mayall, n.d., H.R.H. the Prince of Wales, Edward, Carte de visite, albumen, Charles Nes Photography LLC New York - Paris, LL/5920

Nadar, 1855-1859, Eugène Pelletan, Salted paper print from glass negative, 23.5 x 17.6 cm (9 1/4 x 6 15/16 in), Metropolitan Museum of Art, Purchase, The Howard Gilman Foundation Gift and Rogers Fund, 1991 (1991.1198), LL/6316

Unidentified photographer, 1850 (ca), Odd Fellow, Daguerreotype, 1/6 plate, Private collection of Steven Evans, Courtesy of Stephen Evans Vintage Photography (www.se-photo.com, #500), LL/9472

W. & W. H. Lewis (142 Chatham St., New York), 1849 (ca), Merchant Marine sailor, Daguerreotype, 1/6 plate, Archives of Modern Conflict OR National Gallery of Canada, LL/11400

Unidentified photographer, 1854 (ca), Portrait of a gentleman, Daguerreotype, 1/6 plate, Archives of Modern Conflict OR National Gallery of Canada, LL/11404

Unidentified photographer, 1850s (ca), Hunter with Dog and Gun, Daguerreotype, 1/6 plate, Lee Gallery, Courtesy of Lee Gallery (T1695), LL/13962

Unidentified photographer, n.d., A gentleman wearing a top hat, English, Daguerreotype, 1/4 plate, Stereographica - Antique Photographica, Courtesy of Bryan and Page Ginns (#17 / 117), LL/17448

Unidentified photographer, 1843-1844 (ca), Portrait of a hunter, Daguerreotype, 9.2 x 6.9 cm, Artcurial, courtesy of Artcurial (Sale 1170, Lot 5), LL/19500

Unidentified photographer, n.d., Lively Gents with Hats, Daguerreotype, 1/6 plate, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (50 / 5), LL/22284

Unidentified photographer, n.d., Gentleman in his Paisley Smoking Jacket, Daguerreotype, 1/4 plate, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (50 / 22), LL/22326

Unidentified photographer, n.d., Reflecting man - in Plumbe case, Daguerreotype, 1/6 plate, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim (Auction: Feb 21, 2008, 51, part 1 / lot 6), LL/27039

Unidentified photographer, n.d., Fully armed gentleman, Daguerreotype, 1/4 plate, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim (Auction: Feb 21, 2008, 51, part 1 / lot 33), LL/27060

Unidentified photographer / artist, n.d., Actor holds mask, Ambrotype, 1/2 plate, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim (Auction: Feb 21, 2008, 51, part 1 / lot 51), LL/27069

Jeremiah Gurney, 1852-1859, Portrait of an unknown man, Daguerreotype, Encased, Rijksmuseum, Copyright © Rijksmuseum Amsterdam (RP-F-1997-82), LL/25754

A. Polman & J. Hohmann, 1859, Portrait of Prince Willem of the Netherlands (1840-1879), Photograph, hand-painted, Koninklijk Huis Archief Den Haag, Copyright © Koninklijk Huis Archief Den Haag (A_XIV_1054_2), LL/25776

Maull & Polyblank, 1857, Portrait of Professor Michael Faraday, [Photographic Portraits of Living Celebrities], Albumen print, from wet collodion on glass negative, Universiteitsmuseum Utrecht, Copyright © Universiteitsmuseum Utrecht (UMU-UG-3207), LL/25778

Bertha Wehnert-Beckmann, 1850s, Portrait of a gentleman, Salt print, wet-plate collodion negative, 18 x 14 cm, Bassenge Photography Auctions, Bassenge 91. Auction - 19th - 21st Century Photography (June 11, 15.00, 3 PM CET), Lot: 4598, LL/29106

Antoine Claudet, 1853, Self-Portrait with His Son Francis, Daguerreotype, stereo, two 1/6 plates, 2 11/16 x 2 1/4 in, J. Paul Getty Museum, The J. Paul Getty Trust (84.XT.266.10), LL/7497

Etienne Carjat, 1879, Georges Clémenceau, Woodburytype, 8 3/4 x 7 1/8 in (22.23 x 18.1 cm) (image), Minneapolis Institute of Art - MIA, Minneapolis Institute for the Arts, The David Dayton Draper Fund (75.59.3), LL/7287

Julia Margaret Cameron, 1874, July, Charles Norman with His Daughters, Adeline and Margaret [Freshwater, Isle of Wight], Albumen silver print, J. Paul Getty Museum, © J. Paul Getty Trust [94.XM.31.4], LL/6004

Gustave Le Gray, 1860, July, Portrait of Giuseppe Garibaldi, Albumen print, 10 1/8 x 7 3/4, J. Paul Getty Museum, © J. Paul Getty Trust [84.XM.637.9], LL/6048

Unidentified photographer / artist, n.d., An anonymous early photographer, Archives of Modern Conflict OR National Gallery of Canada, LL/9821

H. Osterhout, n.d., Photographer with large camera on tripod holding lens cap, plates and case at his feet., Cabinet card, Jeffrey Kraus Antique Photographics, Courtesy of Jeffrey Kraus, LL/6247

Robert Howlett, n.d., Isambard Kingdom Brunel, Carte de visite, Source requested, LL/6264

Unidentified photographer / artist, 1855 (ca), French hand painted portrait of a Gentleman, Calotype, hand-painted, 270 x 215mm, 10 1/2 x 8 1/2 in, Antiq-Photo, Courtesy of Anthony Davis - Antiq-photo / Rainbow creations (www.19cPhoto.com - 2pe41), LL/9482

Jeremiah Gurney, n.d., Mark Twain shaking hands with actor John Raymond who played the title role in "Colonel Sellers" which was based on the novel The Gilded Age., Cabinet card, Jeffrey Kraus Antique Photographics, Courtesy of Jeffrey Kraus (AA78), LL/10976

Alexander Gardner, 1865, George B. Atzerodt (One of the Lincoln Assassination Conspirators), [The Lincoln Conspiracy Album], Albumen print, 16.4 x 12.4 cm, George Eastman Museum, © 2004 George Eastman House, LL/6414

Unidentified photographer / artist, n.d., Booth, Carte de visite, Private collection of Stuart Schneider, LL/14942

Unidentified photographer / artist, 1870s (ca), A Bolivian Beau Brummel type, Carte de visite, Private collection of Daniel Buck, LL/15082

Unidentified photographer / artist, n.d., [Top Hat / Bottom Hat], Carte de visite, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (45 / 58), LL/7404

J. Maes, n.d., Artist Charles Felu painting with his feet, Carte de visite, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (50 / 37), LL/22351

Wells and Inch, n.d., Sonora California Hunters, Cabinet card, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (47 / 184), LL/11454

Albert Sands Southworth, 1860s, Albert Southworth, with Nellie Coburn, Carte de visite, albumen print, Private collection of Larry West, Courtesy of Larry J. West, © West Companies, Inc., 2005. [From the book: Tokens of Affection and Regard], LL/8594

Wilhelm Höffert, 1886 (ca), Karl Scheidemantel, German baritone, Cabinet card, Private collection of T. Max Hochstetler, LL/19918

Central Photo Parlors, 1895 (ca), Dandy!, Gelatin silver print, toned (Cabinet card), 5.4 in (13.72 cm) x 4 in (10.16 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1787), LL/8949

Southwell Brothers, 1860s (ca), John Ross, Canadian politician, Carte de visite, Paul Frecker, LL/12302

Unidentified photographer / artist, n.d., Armless Navy Veteran: Richard D. Dunphy, Carte de visite, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim (Auction: March 13, 2008, 51, part 2 / lot 73), LL/27686

Bieber Family, n.d., Mariano de Padilla, Carte de visite, Private collection of T. Max Hochstetler, © Klaus Niermann - studioniermann.de/html/bieber.html, LL/14234

Sarony, 1882, Oscar Wilde, Cabinet card, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (45 / 76), LL/10905

Unidentified photographer, 1875 (ca), A group suicide, Tintype, 3 1/2 x 2 1/2 in, Private collection of Andrew Daneman, LL/24366

Unidentified photographer, 1870s (ca), Western portrait of a Cowboy, Tintype, 1/6 plate, Charles Schwartz Ltd, Courtesy of Charles Schwartz Ltd (www.cs-photo.com - #9118), LL/9083

Camille Silvy, 1859-1860 (ca) - See note, Street Musicians, Albumen print, 11 x 8 3/4 in, J. Paul Getty Museum, The J. Paul Getty Trust (85.XM.516), LL/7326

André Adolphe-Eugène Disdéri, 1860, Prince Napoleon, 8.70 x 5.30 cm, National Galleries of Scotland, Courtesy of the National Galleries of Scotland, Presented by Mrs. E. Murray 1991 (PGP 276), LL/7695

Nadar, n.d., Sarah Bernhardt in Jeanne d'Arc, Woodburytype, 6 1/2 x 5 in, Larry Gottheim, Be-hold, Inc, Courtesy of Larry Gottheim - Be-Hold (46 / 164), LL/8141

Unidentified photographer, 1862 (ca), Russian Soldiers Regiments Preobrajenski & Paul, Albumen print, 9 x 6.625 ins 230 x 165 mm, Antiq-Photo, Courtesy of Anthony Davis - Antiq-photo / Rainbow creations (www.19cPhoto.com - 3eg427), LL/8640

G.W. Pach, 1872, President Grant at his Cottage by the Sea (Detail), Stereocard, Jefferson Stereoptics, Courtesy of John Saddy (Auction, Tues. May 23rd & Thurs. May 25th, 2006, # 06-2, Lot 309), LL/11757

G.W. Pach, 1872, President Grant at his Cottage by the Sea, Stereocard, Jefferson Stereoptics, Courtesy of John Saddy (Auction, Tues. May 23rd & Thurs. May 25th, 2006, # 06-2, Lot 309), LL/11756

James Cremer, 1870s (ca), Pledging the Diamond Ring, Stereoview, detail, Jefferson Stereoptics, Courtesy of John Saddy (Auction, Tues. August 29th & Thurs. August 31st, 2006, # 06-3, Lot 580), LL/13868

Underwood & Underwood, 1902 (copyright), His Majesty Edward VII., with members of the Royal Family, and high British Officials on the Royal Yacht - England (Detail), Stereocard, Jefferson Stereoptics, LL/12413

Alexander Gardner, 1863, June, Studying the Art of War, [Gardner's Photographic Sketch Book of the War. Incidents of the War, pl. 45], Albumen print, 7 x 9 in, Lee Gallery, Courtesy of Lee Gallery (Z1381), LL/12696

D.C. Reddington, 1870s-1880s (Further information sought), A.C. Yates & Co., Children's & Doys' Department, Cabinet card, Private collection of Brad Feuerhelm, LL/13514

S. Marksville, 1870s-1880s (Further information sought), Home Furnishings and Art, No. 310 [], Cabinet card, Private collection of Brad Feuerhelm, LL/13525

Antoine Samuel Adam-Salomon, 1875 (ca), Charles Garnier, famous architect of the Opera in Paris., [Galerie Contemporaine], Woodburytype, 19 x 23 cm (approx), Private collection of Jan Weijers (Servatius), LL/27081

Etienne Carjat, 1876, Victor Hugo (French writer), Private collection of Jan Weijers (Servatius), Courtesy of Jan Weijers, LL/26076

Unidentified photographer, 1895 (taken) 1996 (print), William J. Flake, Cyanotype, Carl Mautz Vintage Photographs, LL/25700

Alvin Langdon Coburn, 1908, 21 December, Mark Twain, Reproduction, 6.5 x 7.75 in, Charles Schwartz Ltd, Courtesy of Charles Schwartz, LL/10407

Lewis W. Hine, 1910, Telegraph Messengers, Knoxville, Gelatin silver print, 12 x 16.5 cm (5 x 6.5 ), Galerie Johannes Faber, LL/1734

Unidentified photographer, 1898, "Wanted" Photo for Criminal Wm. L. Walsh, Carte de visite, Charles Schwartz Ltd, Courtesy of Charles Schwartz (#7912), LL/14295

Fritz Schmidt (Editor), 1912/1913, Im-frühling, [Farbenphotographie], Printed from an autochrome original, Private collection of Mark Jacobs, Collection Mark Jacobs, LL/9377

Underwood & Underwood, n.d., 4935 President Roosevelt's choicest recreation, amid Nature's rugged grandeur - on Glacier Point, Yosemite (Detail), Stereocard, Jefferson Stereoptics, Courtesy of John Saddy (Auction, Tues. May 23rd & Thurs. May 25th, 2006, # 06-2, Lot 289), LL/11755

Lewis W. Hine, n.d., Untitled, Private collection of W.J. Coville, Courtesy of W.J. Coville (#279), LL/14579

Henry M. Beach, 1908 (ca), Huckleberry Charlie, Pine Camp, N.Y., Photo postcard, 3 1/2 x 5 1/2 in, Private collection of Robert Bogdan, LL/26456

Unidentified photographer, 1918-1919 (ca), [Photograph of Berlin inhabitants cutting up a horse for meat during fighting in the city], Photograph, Imperial War Museum, Crown Copyright [Imperial War Museum, IWM Q 110883], LL/6581

Alexander Rodchenko, 1928 (ca), Vladimir Mayakovsky at the Beach, Silver print, 6 3/4 x 4 3/4 in (17.1 x 12.1 cm), Swann Galleries - New York, Courtesy of Swann Galleries (Auction, Feb 7, 2008, #2135, Lot 58), LL/27099

August Sander, 1926, The Wife Of The Painter Peter Abelen, Gelatin silver print, 10 x 7.25, Andrew Smith Gallery, © Die Photographische Sammlung/SK Stiftung Kultur - August Sander Archiv, Köln; VG-Bild Kunst, Bonn, 2011, LL/2437

Unidentified photographer, 1934, 30 March, Mugshot Andrew Misner, Howard Hunter, Gelatin silver print, mugshot, 8 1/2 x 6 1/2 in, Steven Kasher Gallery, LL/24137

E.A. Lewis, n.d., Portrait of a man with a black silk stock, Carte de visite, Private collection of Andrea Cesari, LL/29585

A.N. Hardy (Bucksport, ME), n.d., Portrait of Deacon Stephen Davis, Carte de visite, Private collection of Andrea Cesari, LL/29587

A.N. Hardy (Boston), n.d., Portrait of a sitting gent with a ghostly figure, Carte de visite, double exposure, Private collection of Andrea Cesari, LL/29598

Unidentified photographer, n.d., Portrait of a man wearing a hat, Tintype, Private collection of Andrea Cesari, LL/29611

Unidentified photographer, n.d., Portrait of a young man, Tintype, Private collection of Andrea Cesari, LL/29615