August 8, 1870 | graphite on photographic paper
1881 | graphite on paper
June 1, 1893 | graphite on paper
1875 | graphite on paper, heightened with white chalk
1879 | graphite on woven commercial paper
1881 | printing ink on paper
1887 | printing ink on paper
1886 | brown printing ink on paper
1879 | printing ink on paper
1881 | printing ink on silk fabric
mid-19th century - early 20th century | ink on paper
July 13, 1910 | graphite on paper
August 5, 1873 | graphite on paper
July 11, 1873 | graphite on paper
1878 | graphite on paper
1992 | ballpoint pen on paper