Unidentified photographer, 1930s (ca), By their Lips you Shall Know Them, Gelatin silver print, 6 in (15.24 cm) x 8 in (20.32 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2446), LL/8910

Unidentified photographer, 1846 (ca), Starboard Watch of Maintopmen "Constance", Albumen print, 7.5 in (19.05 cm) x 10.5 in (26.67 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2242), LL/8911

Unidentified photographer, 1940s, Pipe Smokers, Gelatin silver print, 5.5 in (13.97 cm) x 8.5 in (21.59 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2452), LL/8913

Unidentified photographer, 1915 (ca), Women's Hats Catalog Sheet, Gelatin silver print, 6 in (15.24 cm) x 9 in (22.86 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2396), LL/8914

Unidentified photographer, 1915, Palace of Fine Arts, San Francisco (PPIE) Hand-colored, Gelatin silver print, hand-coloured, 7 in (17.78 cm) x 10.75 in (27.31 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2292), LL/8915

Michael E. Bry, 1960s, Peace March, Gelatin silver print, 14 in (35.56 cm) x 9.5 in (24.13 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2353), LL/8916

Unidentified photographer, n.d., Air Field, Gelatin silver print, 3.5 in (8.89 cm) x 4.5 in (11.43 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2339), LL/8917

Unidentified photographer, 1940s (ca), Pine Trees Silhouette, Gelatin silver print, sepia-toned, 6.5 in (16.51 cm) x 4.5 in (11.43 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2310a), LL/8918

Unidentified photographer, n.d., untitled (female nude turning head), Gelatin silver print, 4.75 in (12.06 cm) x 7 in (17.78 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2322), LL/8920

Unidentified photographer, 1940s (ca), Sheep Grazing, Monument Valley, Utah, Gelatin silver print, toned, 8 in (20.32 cm) x 6.5 in (16.51 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2302), LL/8921

Unidentified photographer, 1945 (ca), Horse and Rider (negative image), Gelatin silver print, 5.25 in (13.34 cm) x 3.5 in (8.89 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2158), LL/8922

Air Corps U.S. Army, 1930s, Ferry Building, San Francisco, California, Gelatin silver print, 6.5 in (16.51 cm) x 8.5 in (21.59 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2261), LL/8923

Unidentified photographer, 1906, Market St., San Francisco, After 1906 Earthquake, Gelatin silver print, 6 in (15.24 cm) x 8 in (20.32 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2262), LL/8924

Unidentified photographer, 1960s (ca), Crab Nebula in Taurus, Gelatin silver print, 7.5 in (19.05 cm) x 9.5 in (24.13 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2156), LL/8925

Unidentified photographer, 1908, Man with Skeleton in Doorway, Gelatin silver print, 3 in (7.62 cm) x 4 in (oval), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2165), LL/8926

Unidentified photographer, 1940s, Twelve Portraits of a Man, Gelatin silver print, 9 in (22.86 cm) x 7 in (17.78 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2115), LL/8927

Unidentified photographer, 1910 (ca), Damascus Gate, Jerusalem, Gelatin silver print, toned, 6 in (15.24 cm) x 10 in (25.40 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1843), LL/8939

Tim Matson, 1960s, Pilobolus Dance theatre, Gelatin silver print, 7.25 in (18.41 cm) x 9.25 in (23.49 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1838), LL/8940

Unidentified photographer, 1930s (ca), Bowl of Fruit, Gelatin silver print, 7.75 in (19.68 cm) x 9.75 in (24.76 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1881), LL/8943

Unidentified photographer, 1920 (ca), Bonne Année - spirit image, Gelatin silver print, postcard, 5.25 in (13.34 cm) x 3.25 in (8.26 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1772), LL/8945

Unidentified photographer, 1910, Bust Sculpture by Mario Joseph Korbel, Gelatin silver print, 10 in (25.40 cm) x 8 in (20.32 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1773), LL/8946

Unidentified photographer, 1920s (ca), Greek Corinthian Column Capitals, Gelatin silver print, 5 in (12.70 cm) x 7 in (each image), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1790), LL/8947

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

Unidentified photographer, 1955 (before), Spider in it's Web, Gelatin silver print, 3 in (7.62 cm) x 3 in irregular, Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1746), LL/8950

Unidentified photographer, n.d., Sail Boats, hand-painted, Gelatin silver print or albumen print, hand-coloured, 9.75 in (24.76 cm) x 7.5 in (19.05 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1503), LL/8952

Reid Miles, 1985, Joan Collins Impersonating Cleopatra, C-print, 15 in (38.10 cm) x 23 in (58.42 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1481), LL/8953

Unidentified photographer, 1900 (ca), Family Band, Gelatin silver print, 3.25 in (8.26 cm) x 4.75 in (12.06 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1478), LL/8954

Arthur Wells Bawtree, 1900 (ca), Wing of a Gnat, Magnified 40 Times, Gelatin silver print, 3 in (7.62 cm) x 6 in (15.24 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1339), LL/8955

Unidentified photographer, 1910 (ca), Boy with Bicycle, Tintype, 3.25 in (8.26 cm) x 2.5 in (6.35 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1386), LL/8956

Unidentified photographer, 1940s, Foundry Stack, Gelatin silver print, 4.5 in (11.43 cm) x 3.5 in (8.89 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1226), LL/8985

Unidentified photographer, 1915, Panama Pacific International Exhibition, Gelatin silver print, toned, 15 in (38.10 cm) x 19 in (48.26 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1126), LL/8987

Unidentified photographer, 1960s (ca), Light Drawing, Gelatin silver print, 4 in (10.16 cm) x 3 in (7.62 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1060), LL/8988

Unidentified photographer, 1955 (before), Tennis Player Silhouette, Gelatin silver print, 2.75 in (6.98 cm) x 1.75 in (4.44 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1119), LL/8989

Unidentified photographer, 1930s (ca), Soap, Gelatin silver print, toned, 9.5 in (24.13 cm) x 13.5 in (34.29 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1021), LL/8990

Karl and Emilie Romaine, 1940s (ca), Paper Doll Band, Gelatin silver print, 7.5 in (19.05 cm) x 9.5 in (24.13 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1023), LL/8991

Unidentified photographer, 1930s (ca), Toil, Gelatin silver print, 3.75 in (9.52 cm) x 7 in (17.78 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #1022), LL/8992

Harcourt Studio, 1930s, Woman with Shadows, Gelatin silver print, 9 in (22.86 cm) x 6.5 in (16.51 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #2421), LL/8993

H. M. Auld, 1897, March, Early Kodak: untitled Double Exposure (man with landscape), Gelatin silver printing-out paper, 3.25 round, Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #899), LL/8994

Unidentified photographer, 1920s (ca), Basketball Team (double-sided album page), Gelatin silver print, 7 in (17.78 cm) x 9.75 in (24.76 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #785), LL/8996

Unidentified photographer, 1920s (ca), Basketball Team (double-sided album page), Gelatin silver print, 7 in (17.78 cm) x 9.75 in (24.76 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #785), LL/8997

Raymond Darolle, 1940 (ca), Radar Worker, Gelatin silver print, 8.5 in (21.59 cm) x 8.25 in (20.95 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #811), LL/8998

Unidentified photographer, 1890 (ca), Leaves with photographs, Albumen print, 4.75 in (12.06 cm) x 3.75 in (9.52 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #799), LL/8999

Unidentified photographer, 1900 (ca), Catalogue card, Albumen print, 4 in (10.16 cm) x 5.5 in (13.97 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #746), LL/9000

Unidentified photographer, 1900s (early), After the Flood, Gelatin silver print, sepia-toned, 5 in (12.70 cm) x 8 in (20.32 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #700), LL/9001

Unidentified photographer / artist, 1912 (ca), Violin Making Machine, 6.5 in (16.51 cm) x 4.5 in (11.43 cm), Robert Tat Gallery, Courtesy of Robert Tat Fine Photographs (www.roberttat.com - #705), LL/9002