late 19th century - mid-20th century | gelatin silver process
1899 | gelatin silver process
September 1893 | gelatin silver process
1890 | gelatin silver process
1896 | gelatin silver process
mid-19th century - early 20th century | graphite on paper
late 19th century | graphite on paper
1882 | printing ink on paper
1860 | graphite on paper
1859 | graphite on paper
late-19th century - early 20th century | graphite on paper
1880 | graphite on paper
1886 | wash and graphite on paper
1867 | graphite on paper
1888 | brown printing ink on paper
1888 | copper