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 / artist, 1865 (ca), Spirit Photograph [Woman's spirit behind table with photograph], Albumen print carte de visite, George Eastman Museum, LL/6918

Unidentified photographer, n.d., Spirit of Bernadette, Carte de visite, Larry Gottheim, Be-hold, Inc, LL/11359

William H. Mumler, n.d., Mrs Lincoln & the Ghost of a Spirit, Carte de visite, Larry Gottheim, Be-hold, Inc, LL/27683

Richard Boursnell & J. Evans Sterling (London Spiritualists), 1895-1896, Spirit photograph, Card photograph, Swann Galleries - New York, LL/53747

Richard Boursnell & J. Evans Sterling (London Spiritualists), 1895-1896, Spirit photograph, Card photograph, Swann Galleries - New York, LL/53748

Richard Boursnell & J. Evans Sterling (London Spiritualists), 1895-1896, Spirit photograph, Card photograph, Swann Galleries - New York, LL/53749

Frederick Hudson, 1875-1876, Spirit photograph, Carte de visite, Swann Galleries - New York, LL/53750

Unidentified photographer, n.d., The invisible spirit, Cabinet card, Larry Gottheim, Be-hold, Inc, LL/11367

Unidentified photographer, n.d., A spirit version of herself points to the text. A ghost created by double exposure., Tintype, double exposure, Private collection of Andrew Daneman, LL/29764

Unidentified photographer, n.d., Spirit fakery, Tintype, double exposure, Private collection of Andrew Daneman, LL/29765

Unidentified photographer, n.d., A hair-raising experience for this young man. A ghost created by double exposure., Tintype, double exposure, Private collection of Andrew Daneman, LL/29768

Unidentified photographer, 1870 (ca), Falsified "spirit" presence, Tintype, double exposure, Private collection of Andrew Daneman, LL/30015

Unidentified photographer, n.d., Ghost, Tintype, double exposure, Private collection of Andrew Daneman, LL/29769

Unidentified photographer, n.d., The spirit of Sir Arthur Conan Doyle, Gelatin silver print, Nationaal Archief of the Netherlands / National Archive of the Netherlands, LL/32744

Unidentified photographer / artist, n.d., Untitled [Man being surprised by a ghost], Stereocard, Private collection of Kevin Yee, LL/31112

Unidentified photographer / artist, n.d., Untitled [Man being surprised by a ghost], Stereocard, half, Private collection of Kevin Yee, LL/31113

Unidentified photographer / artist, n.d., Untitled [Being scared by a ghostly apparition], Stereocard, Private collection of Kevin Yee, LL/31124

Unidentified photographer / artist, n.d., Untitled [Being scared by a ghostly apparition], Stereocard, half, Private collection of Kevin Yee, LL/31125

Unidentified photographer / artist, n.d., Untitled [the appearance of a ghostly apparition], Stereocard, Private collection of Kevin Yee, LL/31128

Unidentified photographer / artist, n.d., Untitled [the appearance of a ghostly apparition], Stereocard, half, Private collection of Kevin Yee, LL/31129

L.M. Melander & Bro., 1874-1875 (copyright), Untitled [Two card players have a ghostly visitor], Stereocard, Private collection of Kevin Yee, LL/31134

L.M. Melander & Bro., 1874-1875 (copyright), Untitled [Two card players have a ghostly visitor], Stereocard, half, Private collection of Kevin Yee, LL/31135

L.M. Melander, n.d., 45 - the Haunted Lane, Stereocard, Private collection of Kevin Yee, LL/31136

L.M. Melander, n.d., 45 - the Haunted Lane, Stereocard, half, Private collection of Kevin Yee, LL/31137

Unidentified photographer / artist, n.d., 1107 - Phantom visions, Stereocard, Private collection of Kevin Yee, LL/31144

Unidentified photographer / artist, n.d., 1107 - Phantom visions, Stereocard, half, Private collection of Kevin Yee, LL/31145

London Stereoscopic Company, n.d., Untitled [A gentleman with a ghostly visitor], Stereocard, Private collection of Kevin Yee, LL/31153

London Stereoscopic Company, n.d., Untitled [A gentleman with a ghostly visitor], Stereocard, half, Private collection of Kevin Yee, LL/31154

Keystone View Company, n.d., 642 - "By the Holy St. Patrick ! There‘s Brannigan‘s ghost.", Stereocard, Private collection of Kevin Yee, LL/31306

Keystone View Company, n.d., 642 - "By the Holy St. Patrick ! There‘s Brannigan‘s ghost." (detail), Stereocard, half, Private collection of Kevin Yee, LL/31307

Unidentified photographer / artist, 1860s, The Ghost, Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30159

Unidentified photographer / artist, 1860s, The Ghost, Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30160

Keystone View Company, 1900 (ca), 11921 - that Old Sweetheart of Mine, Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30161

Keystone View Company, 1900 (ca), 11921 - that Old Sweetheart of Mine, Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30162

H.C. White, 1906 (copyright), (1) 5113 In the veil of smoke from pipe of clay, I picture my sweetheart far away., Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30163

H.C. White, 1906 (copyright), (1) 5113 In the veil of smoke from pipe of clay, I picture my sweetheart far away., Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30164

Keystone View Company, n.d., 635 - Only a Dream, Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30165

Keystone View Company, n.d., 635 - Only a Dream, Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30166

Unidentified photographer / artist, n.d., Untitled [A monk with a pair of spirits], Stereocard, Private collection of Kevin Yee, LL/31171

Unidentified photographer / artist, n.d., Untitled [A monk with a pair of spirits], Stereocard, half, Private collection of Kevin Yee, LL/31172

Unidentified photographer / artist, 1860s, Fast Day - A Horrible Intrusion, Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30169

Unidentified photographer / artist, 1860s, Fast Day - A Horrible Intrusion, Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30170

William H. Rau, n.d., Untitled [A woman reading a letter with a ghostly figure nearby], Stereocard, Private collection of Kevin Yee, LL/31161

William H. Rau, n.d., Untitled [A woman reading a letter with a ghostly figure nearby], Stereocard, half, Private collection of Kevin Yee, LL/31162

L.M. Melander, 1877 (copyright), 126 - the Orphans at their Mother‘s Grave, Stereocard, Private collection of Kevin Yee, LL/31169

L.M. Melander, 1877 (copyright), 126 - the Orphans at their Mother‘s Grave, Stereocard, half, Private collection of Kevin Yee, LL/31170

H.P. Moore, 1869 (copyright), Untitled [A sleeping child with a guardian spirit], Stereocard, Private collection of Kevin Yee, LL/31173

H.P. Moore, 1869 (copyright), Untitled [A sleeping child with a guardian spirit], Stereocard, half, Private collection of Kevin Yee, LL/31174

E.K. Foltz, 1897 (copyright), No, 134 Her protecting spirit, Stereocard, Private collection of Kevin Yee, LL/31175

E.K. Foltz, 1897 (copyright), No, 134 Her protecting spirit, Stereocard, half, Private collection of Kevin Yee, LL/31176

Benjamin West Kilburn, 1899 (copyright), 12901. "Mother come back from that echoless shore. Take me again to your arms as of yore.", Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30172

London Stereoscopic Company, 1860s, The Spirit Mother at Evening Prayer, Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30167

Benjamin West Kilburn, 1899 (copyright), 12901. "Mother come back from that echoless shore. Take me again to your arms as of yore.", Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30173

London Stereoscopic Company, 1860s, The Spirit Mother at Evening Prayer, Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30168

Benjamin West Kilburn, 1899 (copyright), 12902. Where is my wandering boy to-night., Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30175

Benjamin West Kilburn, 1899 (copyright), 12902. Where is my wandering boy to-night., Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30176

Keystone View Company, n.d., 11904 - the Dead Soldier, Stereocard, Private collection of Kevin Yee, LL/31114

Keystone View Company, n.d., 11904 - the Dead Soldier, Stereocard, half, Private collection of Kevin Yee, LL/31115

Keystone View Company, n.d., 9463 - the Empty Crib. "We‘re nearer to the other shore since the baby died.", Stereocard, Private collection of Kevin Yee, LL/31116

Keystone View Company, n.d., 9463 - the Empty Crib. "We‘re nearer to the other shore since the baby died.", Stereocard, half, Private collection of Kevin Yee, LL/31117

Benjamin West Kilburn, 1897 (copyright), 11650. Evening Prayer., Stereocard, Private collection of Kevin Yee, LL/31132

Benjamin West Kilburn, 1897 (copyright), 11650. Evening Prayer., Stereocard, half, Private collection of Kevin Yee, LL/31133

Underwood & Underwood, 1902 (copyright), Her Guardian Angel, Stereocard, Private collection of Kevin Yee, LL/31140

Underwood & Underwood, 1902 (copyright), Her Guardian Angel, Stereocard, half, Private collection of Kevin Yee, LL/31141

C.L. Wasson, 1902 (copyright), 1219[?] - Innocence Dreaming of the Angels, Stereocard, Private collection of Kevin Yee, LL/31142

C.L. Wasson, 1902 (copyright), 1219[?] - Innocence Dreaming of the Angels, Stereocard, half, Private collection of Kevin Yee, LL/31143

Unidentified photographer / artist, n.d., Untitled [A mother with her child and a protective spirit], Stereocard, Private collection of Kevin Yee, LL/31155

Unidentified photographer / artist, n.d., Untitled [A mother with her child and a protective spirit], Stereocard, half, Private collection of Kevin Yee, LL/31156

Unidentified photographer / artist, n.d., Untitled [A young traveller with a protective angel], Stereocard, Private collection of Kevin Yee, LL/31157

Unidentified photographer / artist, n.d., Untitled [A young traveller with a protective angel], Stereocard, half, Private collection of Kevin Yee, LL/31158

Michael Burr, 1862-1864 (ca), Untitled [A mother and her children in a graveyard with an angel], Stereocard, Private collection of Kevin Yee, LL/31159

Michael Burr, 1862-1864 (ca), Untitled [A mother and her children in a graveyard with an angel], Stereocard, half, Private collection of Kevin Yee, LL/31160

Unidentified photographer / artist, n.d., Untitled [A mother with a dead child and an angel carrying away the spiritual form], Stereocard, Private collection of Kevin Yee, LL/31163

Unidentified photographer / artist, n.d., Untitled [A mother with a dead child and an angel carrying away the spiritual form], Stereocard, half, Private collection of Kevin Yee, LL/31164

Unidentified photographer / artist, n.d., Untitled [A sleeping child with watching angel], Stereocard, Private collection of Kevin Yee, LL/31167

Unidentified photographer / artist, n.d., Untitled [A sleeping child with watching angel], Stereocard, half, Private collection of Kevin Yee, LL/31168

Keystone View Company, 1899 (copyright), 9540 - the Heavenly Twins, Stereocard, Private collection of Kevin Yee, LL/31177

Keystone View Company, 1899 (copyright), 9540 - the Heavenly Twins, Stereocard, half, Private collection of Kevin Yee, LL/31178

H.P. Moore, 1869 (copyright), Planchette, Stereocard, Private collection of Kevin Yee, LL/31179

H.P. Moore, 1869 (copyright), Planchette, Stereocard, half, Private collection of Kevin Yee, LL/31180

Keystone View Company, 1898 (copyright), [6?]19 - Her Guardian Angel, Stereocard, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30177

Keystone View Company, 1898 (copyright), [6?]19 - Her Guardian Angel, Stereocard, detail, Stereoviews: Stereoviews and Fine 19th & 20th Century Antique Photographs, LL/30178

Unidentified photographer / artist, n.d., Untitled [A lady being disturbed by the appearance of a ghostly winged hourglass], Stereocard, Private collection of Kevin Yee, LL/31130

Unidentified photographer / artist, n.d., Untitled [A lady being disturbed by the appearance of a ghostly winged hourglass], Stereocard, half, Private collection of Kevin Yee, LL/31131

Keystone View Company, 1906 (copyright), 12349 - (2) She dreams of love, and lovers sees before her prostrate fall. A pensive sigh she heaves and says, "A dream, ah ! that is all." From "Character Sketches.", Stereocard, Private collection of Kevin Yee, LL/31120

Keystone View Company, 1906 (copyright), 12349 - (2) She dreams of love, and lovers sees before her prostrate fall. A pensive sigh she heaves and says, "A dream, ah ! that is all." From "Character Sketches.", Stereocard, half, Private collection of Kevin Yee, LL/31121

F.G. Weller, 1871 (copyright), Untitled [An artist being awarded a laurel wreath by a ghostly figure with a group, presumably of his peers, viewing a hanging exhibition.], Stereocard, Private collection of Kevin Yee, LL/31122

F.G. Weller, 1871 (copyright), Untitled [An artist being awarded a laurel wreath by a ghostly figure with a group, presumably of his peers, viewing a hanging exhibition.], Stereocard, half, Private collection of Kevin Yee, LL/31123

Universal Photo Art Co., 1901 (copyright), 4606 Dreaming of Sambo, Stereocard, Private collection of Kevin Yee, LL/31126

Universal Photo Art Co., 1901 (copyright), 4606 Dreaming of Sambo, Stereocard, half, Private collection of Kevin Yee, LL/31127

Benjamin West Kilburn, 1906 (copyright), 16819. the Marriage Dream, Stereocard, Private collection of Kevin Yee, LL/31138

Benjamin West Kilburn, 1906 (copyright), 16819. the Marriage Dream, Stereocard, half, Private collection of Kevin Yee, LL/31139

Unidentified photographer / artist, n.d., Untitled [A woman dreaming of her wedding day], Stereocard, Private collection of Kevin Yee, LL/31165

Unidentified photographer / artist, n.d., Untitled [A woman dreaming of her wedding day], Stereocard, half, Private collection of Kevin Yee, LL/31166

George W. Griffith, 1901 (copyright), 2043. Visions of the Future., Stereocard, Private collection of Kevin Yee, LL/31151

George W. Griffith, 1901 (copyright), 2043. Visions of the Future., Stereocard, half, Private collection of Kevin Yee, LL/31152

Underwood & Underwood, 1901 (copyright), (11) Anticipation - Visions of the future, Stereocard, Private collection of Kevin Yee, LL/31118

Underwood & Underwood, 1901 (copyright), (11) Anticipation - Visions of the future, Stereocard, half, Private collection of Kevin Yee, LL/31119

Keystone View Company, 1899 (copyright), 8018 - the Little Orphan‘s Dream, Stereocard, Private collection of Kevin Yee, LL/31146

Keystone View Company, 1899 (copyright), 8018 - the Little Orphan‘s Dream, Stereocard, half, Private collection of Kevin Yee, LL/31147

Unidentified photographer / artist, 1920-1930, [Houdini and the ghost of Abraham Lincoln], Lantern slide, Library of Congress, Prints and Photographs Division, LL/6976

Unidentified photographer, 1930 (ca), Untitled [Misbehaving angel smokes a cigarette], Gelatin silver print, double exposure, Private collection of David & Kim Leggett, LL/30033

Unidentified photographer, 1975 (ca), Untitled [Ghostly figure], Gelatin silver print, snapshot, double exposure, Private collection of John Foster, LL/29883

Unidentified photographer, 1949, May (date stamped), Untitled [A fast moving woman in the kitchen], Gelatin silver print, snapshot, double exposure, Private collection of John Foster, LL/29892

Dan Estabrook, 2002, Ghosts & Models (Ghost no.1), Calotype negative with graphite and salt print, Catherine Edelman Gallery, LL/4093