1913 | gelatin silver process
September 1863 | graphite on paper
1890 | graphite on blue-lined notebook paper
1881 | graphite on paper
late 19th century | graphite on paper
mid-19th century - early 20th century | graphite on paper
mid-19th century - early 20th century | graphite on tracing paper
1900 | graphite on paper envelope
possibly 1867 | graphite on paper
August 8, 1879 | graphite on paper
1902 | graphite on paper
1888 | ink on notebook paper
1881 | printing ink on paper
1885 | printing ink on paper
1887 | printing ink on paper
1882 | printing ink on paper
1880 | printing ink on paper
1879 | brown printing ink on paper
1881 | brown printing ink on paper