19th-20th century
Charcoal and white chalk on brown wove paper
19th centuryBritishGraphite on darkened off-white wove paper
19th centuryAmericanOil paint on offset lithograph, 1989 edition of Flora de la Real Expedición Botánica del Nuevo Reino de Granada (1783-1810)
21st centuryPeruvianBlack marker on paper
20th centuryGermanBlack ink and black and red wash over graphite on oiled wove paper
18th-19th centuryFrenchInk, white opaque watercolor, and charcoal on paper
18th centuryIndianBlack ink over graphite, colored washes, on off-white antique laid paper
ItalianBlack chalk on cream antique laid paper
18th centuryItalianWatercolor on off-white wove paper
19th-20th centuryAmericanGraphite and white chalk on tan laid paper
19th centuryAustrianGraphite with crayon on paper
20th centuryGerman