1993 | ballpoint pen on paper
late 19th century | graphite on paper
August 1, 1873 | graphite on paper
1879 | graphite on paper
1886 - 1888 | graphite on paper
mid-19th century - early 20th century | graphite on paper
July 12, 1873 | graphite and ink on paper
August 5, 1873 | graphite on paper
June 1873 | graphite on paper
August 21, 1875 | graphite on paper
July 16, 1878 | graphite and black lithographic colored pencil on paper
mid-19th century - early 20th century | ink on paper
1873 | graphite on paper