1881 | printing ink on paper
1881 | brown printing ink on paper
mid-19th century - early 20th century | graphite on tracing paper
1879 | printing ink on paper
1880 | printing ink on paper
1880 | brown printing ink on paper
late-19th century - early 20th century | graphite on paper
1889 | printing ink on paper
1889 | brown printing ink on paper
September 9, 1878 | graphite on paper
1883 | graphite on tracing paper