1881 | printing ink on paper
1883 | printing ink on paper
1882 | printing ink on paper
1884 | printing ink on paper
mid-19th century - early 20th century | graphite on tracing paper
1887 | brown printing ink on paper
1887 | printing ink on paper
1880 | printing ink on paper
July 11, 1873 | graphite on paper
1993 | ballpoint pen on paper
1883 | brown printing ink on paper
1879 | printing ink on paper